class DBFile extends DBComposite implements AssetContainer, Thumbnail (View source)

Represents a file reference stored in a database

Traits

Provides image manipulation functionality.

Allows an object to have extensions applied to it.

A class that can be instantiated or replaced via DI

Provides extensions to this object to integrate it with standard config API methods.

Allows an object to declare a set of custom methods

Properties

static private array $extensions

An array of extension names and parameters to be applied to this object upon construction.

from  Extensible
static private array $casting

An array of objects to cast certain fields to. This is set up as an array in the format:

from  ViewableData
static private string $default_cast

The default object to cast scalar fields to if casting information is not specified, and casting to an object is required.

from  ViewableData
static private string $escape_type

The escape type for this field when inserted into a template - either "xml" or "raw".

from  DBField
static private string $default_search_filter_class

Subclass of {@link SearchFilter} for usage in {@link defaultSearchFilter()}.

from  DBField
static private string|bool $index

The type of index to use for this field. Can either be a string (one of the DBIndexable type options) or a boolean. When a boolean is given, false will not index the field, and true will use the default index type.

from  DBField
static private array $composite_db

Similiar to {@link DataObject::$db}, holds an array of composite field names.

from  DBComposite
static private bool $force_resample

Force all images to resample in all cases Off by default, as this can be resource intensive to apply to multiple images simultaneously.

from  ImageManipulation
static private int $strip_thumbnail_width from  ImageManipulation
static private int $strip_thumbnail_height from  ImageManipulation
static private int $cms_thumbnail_width

The width of an image thumbnail in the CMS.

from  ImageManipulation
static private int $cms_thumbnail_height

The height of an image thumbnail in the CMS.

from  ImageManipulation
static private int $asset_preview_width

The width of an image preview in the Asset section

from  ImageManipulation
static private int $asset_preview_height

The height of an image preview in the Asset section

from  ImageManipulation
static private array $supported_images

List of image mime types supported by the image manipulations API

string $Hash

SHA of the file

string $Filename

Name of the file, including directory

string $Variant

Variant of the file

Methods

mixed
__call(string $method, array $arguments)

Attempts to locate and call a method dynamically added to a class at runtime if a default cannot be located

bool
hasMethod(string $method)

Return TRUE if a method exists on this object

array
allMethodNames(bool $custom = false)

Return the names of all the methods available on this object

static bool
add_extension(string $classOrExtension, string $extension = null)

Add an extension to a specific class.

static 
remove_extension(string $extension)

Remove an extension from a class.

static array
get_extensions(string $class = null, bool $includeArgumentString = false)

No description

static array|null
get_extra_config_sources(string $class = null)

Get extra config sources for this class

static bool
has_extension(string $classOrExtension, string $requiredExtension = null, bool $strict = false)

Return TRUE if a class has a specified extension.

array
invokeWithExtensions(string $method, mixed $a1 = null, mixed $a2 = null, mixed $a3 = null, mixed $a4 = null, mixed $a5 = null, mixed $a6 = null, mixed $a7 = null)

Calls a method if available on both this object and all applied {@link Extensions}, and then attempts to merge all results into an array

array
extend(string $method, mixed $a1 = null, mixed $a2 = null, mixed $a3 = null, mixed $a4 = null, mixed $a5 = null, mixed $a6 = null, mixed $a7 = null)

Run the given function on all of this object's extensions. Note that this method originally returned void, so if you wanted to return results, you're hosed

Extension|null
getExtensionInstance(string $extension)

Get an extension instance attached to this object by name.

bool
hasExtension(string $extension)

Returns TRUE if this object instance has a specific extension applied in {@link $extension_instances}. Extension instances are initialized at constructor time, meaning if you use {@link add_extension()} afterwards, the added extension will just be added to new instances of the extended class. Use the static method {@link has_extension()} to check if a class (not an instance) has a specific extension.

getExtensionInstances()

Get all extension instances for this specific object instance.

static Injectable
create(array ...$args)

An implementation of the factory method, allows you to create an instance of a class

static Injectable
singleton(string $class = null)

Creates a class instance by the "singleton" design pattern.

static Config_ForClass
config()

Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).

mixed
stat(string $name) deprecated

Get inherited config value

mixed
uninherited(string $name)

Gets the uninherited value for the given config option

$this
set_stat(string $name, mixed $value) deprecated

Update the config value for a given property

__construct(string $name = null, array|string $allowed = [])

Create a new image manipulation

bool
__isset(string $property)

Check if a field exists on this object or its failover.

mixed
__get(string $property)

Get the value of a property/field on this object. This will check if a method called get{$property} exists, then check if a field is available using {@link ViewableData::getField()}, then fall back on a failover object.

__set(string $property, mixed $value)

Set a property/field on this object. This will check for the existence of a method called set{$property}, then use the {@link ViewableData::setField()} method.

setFailover(ViewableData $failover)

Set a failover object to attempt to get data from if it is not present on this object.

getFailover()

Get the current failover object if set

bool
hasField(string $field)

Check if a field exists on this object. This should be overloaded in child classes.

mixed
getField(string $field)

get value of a single composite field

$this
setField(string $field, mixed $value, bool $markChanged = true)

Set value of a single composite field

defineMethods()

Add methods from the {@link ViewableData::$failover} object, as well as wrapping any methods prefixed with an underscore into a {@link ViewableData::cachedCall()}.

customise(array|ViewableData $data)

Merge some arbitrary data in with this object. This method returns a {@link ViewableData_Customised} instance with references to both this and the new custom data.

bool
exists()

Composite field defaults to exists only if all fields have values

string
__toString()

No description

from  DBField
setCustomisedObj(ViewableData $object)

No description

string
castingHelper(string $field)

Return the "casting helper" (a piece of PHP code that when evaluated creates a casted value object) for a field on this object. This helper will be a subclass of DBField.

string
castingClass(string $field)

Get the class name a field on this object will be casted to.

string
escapeTypeForField(string $field)

Return the string-format type for the given field.

renderWith(string|array|SSViewer $template, array $customFields = null)

Render this object into the template, and get the result as a string. You can pass one of the following as the $template parameter:

  • a template name (e.g. Page)
  • an array of possible template names - the first valid one will be used
  • an SSViewer instance

object|DBField
obj(string $fieldName, array $arguments = [], bool $cache = false, string $cacheName = null)

Get the value of a field on this object, automatically inserting the value into any available casting objects that have been specified.

object|DBField
cachedCall(string $field, array $arguments = [], string $identifier = null)

A simple wrapper around {@link ViewableData::obj()} that automatically caches the result so it can be used again without re-running the method.

bool
hasValue(string $field, array $arguments = [], bool $cache = true)

Checks if a given method/field has a valid value. If the result is an object, this will return the result of the exists method, otherwise will check if the result is not just an empty paragraph tag.

string
XML_val(string $field, array $arguments = [], bool $cache = false)

Get the string value of a field on this object that has been suitable escaped to be inserted directly into a template.

array
getXMLValues(array $fields)

Get an array of XML-escaped values by field name

getIterator()

Return a single-item iterator so you can iterate over the fields of a single record.

array
getViewerTemplates(string $suffix = '')

Find appropriate templates for SSViewer to use to render this object

Me()

When rendering some objects it is necessary to iterate over the object being rendered, to do this, you need access to itself.

string
ThemeDir() deprecated

Return the directory if the current active theme (relative to the site root).

string
CSSClasses(string $stopAtClass = self::class)

Get part of the current classes ancestry to be used as a CSS class.

Debug()

Return debug information about this object that can be rendered into a template

static DBField
create_field(string $spec, mixed $value, string $name = null, mixed ...$args)

Create a DBField object that's not bound to any particular field.

from  DBField
$this
setName(string $name)

Set the name of this field.

from  DBField
string
getName()

Returns the name of this field.

from  DBField
mixed
getValue()

Returns the value of this field.

$this
setValue(mixed $value, DataObject|array $record = null, bool $markChanged = true)

Assign the given value.

mixed
getDefaultValue()

Get default value assigned at the DB level

from  DBField
$this
setDefaultValue(mixed $defaultValue)

Set default value to use at the DB level

from  DBField
$this
setOptions(array $options = [])

Update the optional parameters for this field

from  DBField
array
getOptions()

Get optional parameters for this field

from  DBField
$this
setIndexType(string|bool $type)

Set the desired index type to use

from  DBField
string|bool
getIndexType()

Return the desired index type to use. Will return false if the field instance should not be indexed.

from  DBField
mixed
prepValueForDB(mixed $value)

Return the transformed value ready to be sent to the database. This value will be escaped automatically by the prepared query processor, so it should not be escaped or quoted at all.

from  DBField
writeToManipulation(array $manipulation)

Write all nested fields into a manipulation

addToQuery(SQLSelect $query)

Add all columns which are defined through {@link requireField()} and {@link $composite_db}, or any additional SQL that is required to get to these columns. Will mostly just write to the {@link SQLSelect->select} array.

$this
setTable(string $tableName)

Assign this DBField to a table

from  DBField
string|null
getTable()

Get the table this field belongs to, if assigned

from  DBField
string
forTemplate()

Determine 'default' casting for this field.

from  DBField
string
HTMLATT()

Gets the value appropriate for a HTML attribute string

from  DBField
string
URLATT()

urlencode this string

from  DBField
string
RAWURLATT()

rawurlencode this string

from  DBField
string
ATT()

Gets the value appropriate for a HTML attribute string

from  DBField
mixed
RAW()

Gets the raw value for this field.

from  DBField
string
JS()

Gets javascript string literal value

from  DBField
string
JSON()

Return JSON encoded value

from  DBField
string
HTML()

Alias for {see XML()}

from  DBField
string
XML()

Return a html5 tag of the appropriate for this file (normally img or a)

string
CDATA()

Safely escape for XML string

from  DBField
mixed
nullValue()

Returns the value to be set in the database to blank this field.

from  DBField
saveInto(DataObject $dataObject)

Saves this field to the given data object.

scaffoldFormField(string $title = null, array $params = null)

Returns a FormField instance used as a default for form scaffolding.

scaffoldSearchField(string $title = null)

Returns a FormField instance used as a default for searchform scaffolding.

from  DBField
defaultSearchFilter(string $name = null)

No description

from  DBField
requireField()

Add the field to the underlying database.

debug()

No description

from  DBField
array
getArrayValue()

No description

from  DBField
$this
setArrayValue(array $value)

No description

from  DBField
string|array
getSchemaValue()

Get formfield schema value

from  DBField
array
getIndexSpecs()

Returns the index specifications for the field instance, for example:

bool
scalarValueOnly()

Whether or not this DBField only accepts scalar values.

array
compositeDatabaseFields()

Return array in the format of {@link $composite_db}.

isChanged()

Returns true if this composite field has changed.

bindTo(DataObject $dataObject)

Bind this field to the dataobject, and set the underlying table to that of the owner

DBField|null
dbObject(string $field)

Get a db object for the named field

$this
setAllowGeneration(bool $allow)

Set whether image resizes are allowed

bool
getAllowGeneration()

Check if resizes are allowed

existingOnly()

Return clone of self which promises to only return existing thumbnails

string
getString()

No description

resource
getStream()

No description

string
getURL(bool $grant = true)

No description

string
getAbsoluteURL()

Get the absolute URL to this resource

array|null
getMetaData()

Get metadata for this file

string
getMimeType()

Get mime type

int
getAbsoluteSize()

Return file size in bytes.

string
getFilename()

Get value of filename

string
getHash()

Get value of hash

string
getVariant()

Get value of variant

bool
getIsImage()

Determine if a valid non-empty image exists behind this asset, which is a format compatible with image manipulations

Pad(int $width, int $height, string $backgroundColor = 'FFFFFF', int $transparencyPercent = 0)

Fit image to specified dimensions and fill leftover space with a solid colour (default white). Use in templates with $Pad.

Resampled()

Forces the image to be resampled, if possible

updateURL(string $url)

Update the url to point to a resampled version if forcing

ResizedImage(int $width, int $height)

Generate a resized copy of this image with the given width & height.

Fit(int $width, int $height)

Scale image proportionally to fit within the specified bounds

FitMax(int $width, int $height)

Proportionally scale down this image if it is wider or taller than the specified dimensions.

ScaleWidth(int $width)

Scale image proportionally by width. Use in templates with $ScaleWidth.

ScaleMaxWidth(int $width)

Proportionally scale down this image if it is wider than the specified width.

ScaleHeight(int $height)

Scale image proportionally by height. Use in templates with $ScaleHeight.

ScaleMaxHeight(int $height)

Proportionally scale down this image if it is taller than the specified height.

CropWidth(int $width)

Crop image on X axis if it exceeds specified width. Retain height.

CropHeight(int $height)

Crop image on Y axis if it exceeds specified height. Retain width.

FillMax(int $width, int $height)

Crop this image to the aspect ratio defined by the specified width and height, then scale down the image to those dimensions if it exceeds them.

Fill(int $width, int $height)

Resize and crop image to fill specified dimensions.

Quality(int $quality)

Set the quality of the resampled image

CMSThumbnail()

Default CMS thumbnail

StripThumbnail()

Generates a thumbnail for use in the gridfield view

PreviewThumbnail()

Get preview for this file

Thumbnail(int $width, int $height)

Default thumbnail generation for Images

ThumbnailIcon(int $width, int $height)

Thubnail generation for all file types.

IconTag()

Get HTML for img containing the icon for this file

string
ThumbnailURL(int $width, int $height)

Get URL to thumbnail of the given size.

string
getIcon()

Return the relative URL of an icon for the file type, based on the {@link appCategory()} value.

getImageBackend()

Get Image_Backend instance for this image

$this
setImageBackend(Image_Backend $backend)

No description

int
getWidth()

Get the width of this image.

int
getHeight()

Get the height of this image.

int
getOrientation()

Get the orientation of this image.

bool
isSize(int $width, int $height)

Determine if this image is of the specified size

bool
isWidth(int $width)

Determine if this image is of the specified width

bool
isHeight(int $height)

Determine if this image is of the specified width

manipulateImage(string $variant, callable $callback)

Wrapper for manipulate that passes in and stores Image_Backend objects instead of tuples

manipulate(string $variant, callable $callback)

Generate a new DBFile instance using the given callback if it hasn't been created yet, or return the existing one if it has.

string
variantName(string $format, $arg = null)

Name a variant based on a format with arbitrary parameters

array|null
variantParts($variantName)

Reverses {@link variantName()}.

setAttribute(string $name, mixed $value)

Add a HTML attribute when rendering this object. This method is immutable, it will return you a copy of the original object.

mixed|null
getAttribute($name)

Retrieve the value of an HTML attribute

array
getAttributes()

Allows customization through an 'updateAttributes' hook on the base class.

string
getAttributesHTML(array $attributes = null)

Custom attributes to process. Falls back to {@link getAttributes()}.

bool
IsLazyLoaded()

Determine whether the image should be lazy loaded

LazyLoad(mixed $lazyLoad)

Set the lazy loading state for this Image

string
getTag()

Return a html5 tag of the appropriate for this file (normally img or a)

string
getFrontendTemplate()

Determine the template to render as on the frontend

string
getBasename()

Get trailing part of filename

string
getExtension()

Get file extension

string
getTitle()

Alt title for this

array
setFromLocalFile(string $path, string $filename = null, string $hash = null, string $variant = null, array $config = [])

Assign a local file to the backend.

array
setFromStream(resource $stream, string $filename, string $hash = null, string $variant = null, array $config = [])

Assign a stream to the backend

array
setFromString(string $data, string $filename, string $hash = null, string $variant = null, array $config = [])

Assign a set of data to the backend

string
Link()

Return URL for this image. Alias for getURL()

string
AbsoluteLink()

Return absolute URL for this image. Alias for getAbsoluteURL()

string
getSourceURL(bool $grant = true)

Get URL, but without resampling.

string
getVisibility()

Determine visibility of the given file

$this
setOriginal(AssetContainer $original)

Customise this object with an "original" record for getting other customised fields

array
getAllowedCategories()

Get list of allowed file categories

$this
setAllowedCategories(array|string $categories)

Assign allowed categories

bool
validate(ValidationResult $result, string $filename = null)

Hook to validate this record against a validation result

string|false
getSize()

Returns the size of the file type in an appropriate format.

bool
deleteFile()

Delete a file (and all variants).

publishFile()

Publicly expose the file (and all variants) identified by the given filename and hash {see AssetStore::publish}

protectFile()

Protect a file (and all variants) from public access, identified by the given filename and hash.

grantFile()

Ensures that access to the specified protected file is granted for the current user.

revokeFile()

Revoke access to the given file for the current user.

bool
canViewFile()

Check if the current user can view the given file.

string
renameFile(string $newName)

Rename to new filename, and point to new file

string
copyFile(string $newName)

Copy to new filename.

Details

mixed __call(string $method, array $arguments)

Attempts to locate and call a method dynamically added to a class at runtime if a default cannot be located

You can add extra methods to a class using {@link Extensions}, {@link Object::createMethod()} or {@link Object::addWrapperMethod()}

Parameters

string $method
array $arguments

Return Value

mixed

Exceptions

BadMethodCallException

bool hasMethod(string $method)

Return TRUE if a method exists on this object

This should be used rather than PHP's inbuild method_exists() as it takes into account methods added via extensions

Parameters

string $method

Return Value

bool

array allMethodNames(bool $custom = false)

Return the names of all the methods available on this object

Parameters

bool $custom

include methods added dynamically at runtime

Return Value

array

static bool add_extension(string $classOrExtension, string $extension = null)

Add an extension to a specific class.

The preferred method for adding extensions is through YAML config, since it avoids autoloading the class, and is easier to override in more specific configurations.

As an alternative, extensions can be added to a specific class directly in the {@link Object::$extensions} array. See {@link SiteTree::$extensions} for examples. Keep in mind that the extension will only be applied to new instances, not existing ones (including all instances created through {@link singleton()}).

Parameters

string $classOrExtension

Class that should be extended - has to be a subclass of {@link Object}

string $extension

Subclass of {@link Extension} with optional parameters as a string, e.g. "Versioned" or "Translatable('Param')"

Return Value

bool

Flag if the extension was added

See also

http://doc.silverstripe.org/framework/en/trunk/reference/dataextension

static remove_extension(string $extension)

Remove an extension from a class.

Note: This will not remove extensions from parent classes, and must be called directly on the class assigned the extension.

Keep in mind that this won't revert any datamodel additions of the extension at runtime, unless its used before the schema building kicks in (in your _config.php). Doesn't remove the extension from any {@link Object} instances which are already created, but will have an effect on new extensions. Clears any previously created singletons through {@link singleton()} to avoid side-effects from stale extension information.

Parameters

string $extension

class name of an {@link Extension} subclass, without parameters

static array get_extensions(string $class = null, bool $includeArgumentString = false)

Parameters

string $class

If omitted, will get extensions for the current class

bool $includeArgumentString

Include the argument string in the return array, FALSE would return array("Versioned"), TRUE returns array("Versioned('Stage','Live')").

Return Value

array

Numeric array of either {@link DataExtension} class names, or eval'ed class name strings with constructor arguments.

static array|null get_extra_config_sources(string $class = null)

Get extra config sources for this class

Parameters

string $class

Name of class. If left null will return for the current class

Return Value

array|null

static bool has_extension(string $classOrExtension, string $requiredExtension = null, bool $strict = false)

Return TRUE if a class has a specified extension.

This supports backwards-compatible format (static Object::has_extension($requiredExtension)) and new format ($object->has_extension($class, $requiredExtension))

Parameters

string $classOrExtension

Class to check extension for, or the extension name to check if the second argument is null.

string $requiredExtension

If the first argument is the parent class, this is the extension to check. If left null, the first parameter will be treated as the extension.

bool $strict

if the extension has to match the required extension and not be a subclass

Return Value

bool

Flag if the extension exists

array invokeWithExtensions(string $method, mixed $a1 = null, mixed $a2 = null, mixed $a3 = null, mixed $a4 = null, mixed $a5 = null, mixed $a6 = null, mixed $a7 = null)

Calls a method if available on both this object and all applied {@link Extensions}, and then attempts to merge all results into an array

Parameters

string $method

the method name to call

mixed $a1
mixed $a2
mixed $a3
mixed $a4
mixed $a5
mixed $a6
mixed $a7

Return Value

array

List of results with nulls filtered out

array extend(string $method, mixed $a1 = null, mixed $a2 = null, mixed $a3 = null, mixed $a4 = null, mixed $a5 = null, mixed $a6 = null, mixed $a7 = null)

Run the given function on all of this object's extensions. Note that this method originally returned void, so if you wanted to return results, you're hosed

Currently returns an array, with an index resulting every time the function is called. Only adds returns if they're not NULL, to avoid bogus results from methods just defined on the parent extension. This is important for permission-checks through extend, as they use min() to determine if any of the returns is FALSE. As min() doesn't do type checking, an included NULL return would fail the permission checks.

The extension methods are defined during {@link __construct()} in {@link defineMethods()}.

Parameters

string $method

the name of the method to call on each extension

mixed $a1
mixed $a2
mixed $a3
mixed $a4
mixed $a5
mixed $a6
mixed $a7

Return Value

array

Extension|null getExtensionInstance(string $extension)

Get an extension instance attached to this object by name.

Parameters

string $extension

Return Value

Extension|null

bool hasExtension(string $extension)

Returns TRUE if this object instance has a specific extension applied in {@link $extension_instances}. Extension instances are initialized at constructor time, meaning if you use {@link add_extension()} afterwards, the added extension will just be added to new instances of the extended class. Use the static method {@link has_extension()} to check if a class (not an instance) has a specific extension.

Caution: Don't use singleton()->hasExtension() as it will give you inconsistent results based on when the singleton was first accessed.

Parameters

string $extension

Classname of an {@link Extension} subclass without parameters

Return Value

bool

Extension[] getExtensionInstances()

Get all extension instances for this specific object instance.

See {@link get_extensions()} to get all applied extension classes for this class (not the instance).

This method also provides lazy-population of the extension_instances property.

Return Value

Extension[]

Map of {@link DataExtension} instances, keyed by classname.

static Injectable create(array ...$args)

An implementation of the factory method, allows you to create an instance of a class

This method will defer class substitution to the Injector API, which can be customised via the Config API to declare substitution classes.

This can be called in one of two ways - either calling via the class directly, or calling on Object and passing the class name as the first parameter. The following are equivalent: $list = DataList::create('SiteTree'); $list = SiteTree::get();

Parameters

array ...$args

Return Value

Injectable

static Injectable singleton(string $class = null)

Creates a class instance by the "singleton" design pattern.

It will always return the same instance for this class, which can be used for performance reasons and as a simple way to access instance methods which don't rely on instance data (e.g. the custom SilverStripe static handling).

Parameters

string $class

Optional classname to create, if the called class should not be used

Return Value

Injectable

The singleton instance

static Config_ForClass config()

Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).

Return Value

Config_ForClass

mixed stat(string $name) deprecated

deprecated 5.0 Use ->config()->get() instead

Get inherited config value

Parameters

string $name

Return Value

mixed

mixed uninherited(string $name)

Gets the uninherited value for the given config option

Parameters

string $name

Return Value

mixed

$this set_stat(string $name, mixed $value) deprecated

deprecated 5.0 Use ->config()->set() instead

Update the config value for a given property

Parameters

string $name
mixed $value

Return Value

$this

__construct(string $name = null, array|string $allowed = [])

Create a new image manipulation

Parameters

string $name
array|string $allowed

List of allowed file categories (not extensions), as per File::$app_categories

bool __isset(string $property)

Check if a field exists on this object or its failover.

Note that, unlike the core isset() implementation, this will return true if the property is defined and set to null.

Parameters

string $property

Return Value

bool

mixed __get(string $property)

Get the value of a property/field on this object. This will check if a method called get{$property} exists, then check if a field is available using {@link ViewableData::getField()}, then fall back on a failover object.

Parameters

string $property

Return Value

mixed

__set(string $property, mixed $value)

Set a property/field on this object. This will check for the existence of a method called set{$property}, then use the {@link ViewableData::setField()} method.

Parameters

string $property
mixed $value

setFailover(ViewableData $failover)

Set a failover object to attempt to get data from if it is not present on this object.

Parameters

ViewableData $failover

ViewableData|null getFailover()

Get the current failover object if set

Return Value

ViewableData|null

bool hasField(string $field)

Check if a field exists on this object. This should be overloaded in child classes.

Parameters

string $field

Return Value

bool

mixed getField(string $field)

get value of a single composite field

Parameters

string $field

Return Value

mixed

$this setField(string $field, mixed $value, bool $markChanged = true)

Set value of a single composite field

Parameters

string $field
mixed $value
bool $markChanged

Return Value

$this

defineMethods()

Add methods from the {@link ViewableData::$failover} object, as well as wrapping any methods prefixed with an underscore into a {@link ViewableData::cachedCall()}.

Exceptions

LogicException

ViewableData_Customised customise(array|ViewableData $data)

Merge some arbitrary data in with this object. This method returns a {@link ViewableData_Customised} instance with references to both this and the new custom data.

Note that any fields you specify will take precedence over the fields on this object.

Parameters

array|ViewableData $data

Return Value

ViewableData_Customised

bool exists()

Composite field defaults to exists only if all fields have values

Return Value

bool

string __toString()

Return Value

string

the class name

ViewableData getCustomisedObj()

Return Value

ViewableData

setCustomisedObj(ViewableData $object)

Parameters

ViewableData $object

string castingHelper(string $field)

Return the "casting helper" (a piece of PHP code that when evaluated creates a casted value object) for a field on this object. This helper will be a subclass of DBField.

Parameters

string $field

Return Value

string

Casting helper As a constructor pattern, and may include arguments.

Exceptions

Exception

string castingClass(string $field)

Get the class name a field on this object will be casted to.

Parameters

string $field

Return Value

string

string escapeTypeForField(string $field)

Return the string-format type for the given field.

Parameters

string $field

Return Value

string

'xml'|'raw'

DBHTMLText renderWith(string|array|SSViewer $template, array $customFields = null)

Render this object into the template, and get the result as a string. You can pass one of the following as the $template parameter:

  • a template name (e.g. Page)
  • an array of possible template names - the first valid one will be used
  • an SSViewer instance

Parameters

string|array|SSViewer $template

the template to render into

array $customFields

fields to customise() the object with before rendering

Return Value

DBHTMLText

object|DBField obj(string $fieldName, array $arguments = [], bool $cache = false, string $cacheName = null)

Get the value of a field on this object, automatically inserting the value into any available casting objects that have been specified.

Parameters

string $fieldName
array $arguments
bool $cache

Cache this object

string $cacheName

a custom cache name

Return Value

object|DBField

object|DBField cachedCall(string $field, array $arguments = [], string $identifier = null)

A simple wrapper around {@link ViewableData::obj()} that automatically caches the result so it can be used again without re-running the method.

Parameters

string $field
array $arguments
string $identifier

an optional custom cache identifier

Return Value

object|DBField

bool hasValue(string $field, array $arguments = [], bool $cache = true)

Checks if a given method/field has a valid value. If the result is an object, this will return the result of the exists method, otherwise will check if the result is not just an empty paragraph tag.

Parameters

string $field
array $arguments
bool $cache

Return Value

bool

string XML_val(string $field, array $arguments = [], bool $cache = false)

Get the string value of a field on this object that has been suitable escaped to be inserted directly into a template.

Parameters

string $field
array $arguments
bool $cache

Return Value

string

array getXMLValues(array $fields)

Get an array of XML-escaped values by field name

Parameters

array $fields

an array of field names

Return Value

array

ArrayIterator getIterator()

Return a single-item iterator so you can iterate over the fields of a single record.

This is useful so you can use a single record inside a <% control %> block in a template - and then use to access individual fields on this object.

Return Value

ArrayIterator

array getViewerTemplates(string $suffix = '')

Find appropriate templates for SSViewer to use to render this object

Parameters

string $suffix

Return Value

array

ViewableData Me()

When rendering some objects it is necessary to iterate over the object being rendered, to do this, you need access to itself.

Return Value

ViewableData

string ThemeDir() deprecated

deprecated 4.0.0:5.0.0 Use $resourcePath or $resourceURL template helpers instead

Return the directory if the current active theme (relative to the site root).

This method is useful for things such as accessing theme images from your template without hardcoding the theme page - e.g. .

This method should only be used when a theme is currently active. However, it will fall over to the current project directory.

Return Value

string

URL to the current theme

string CSSClasses(string $stopAtClass = self::class)

Get part of the current classes ancestry to be used as a CSS class.

This method returns an escaped string of CSS classes representing the current classes ancestry until it hits a stop point - e.g. "Page DataObject ViewableData".

Parameters

string $stopAtClass

the class to stop at (default: ViewableData)

Return Value

string

ViewableData_Debugger Debug()

Return debug information about this object that can be rendered into a template

Return Value

ViewableData_Debugger

static DBField create_field(string $spec, mixed $value, string $name = null, mixed ...$args)

Create a DBField object that's not bound to any particular field.

Useful for accessing the classes behaviour for other parts of your code.

Parameters

string $spec

Class specification to construct. May include both service name and additional constructor arguments in the same format as DataObject.db config.

mixed $value

value of field

string $name

Name of field

mixed ...$args

Additional arguments to pass to constructor if not using args in service $spec Note: Will raise a warning if using both

Return Value

DBField

$this setName(string $name)

Set the name of this field.

The name should never be altered, but it if was never given a name in the first place you can set a name.

If you try an alter the name a warning will be thrown.

Parameters

string $name

Return Value

$this

string getName()

Returns the name of this field.

Return Value

string

mixed getValue()

Returns the value of this field.

Return Value

mixed

$this setValue(mixed $value, DataObject|array $record = null, bool $markChanged = true)

Assign the given value.

If $record is assigned to a dataobject, this field becomes a loose wrapper over the records on that object instead.

{see \SilverStripe\ORM\FieldType\ViewableData::obj}

Parameters

mixed $value
DataObject|array $record

An array or object that this field is part of

bool $markChanged

Indicate whether this field should be marked changed. Set to FALSE if you are initializing this field after construction, rather than setting a new value.

Return Value

$this

mixed getDefaultValue()

Get default value assigned at the DB level

Return Value

mixed

$this setDefaultValue(mixed $defaultValue)

Set default value to use at the DB level

Parameters

mixed $defaultValue

Return Value

$this

$this setOptions(array $options = [])

Update the optional parameters for this field

Parameters

array $options

Array of options

Return Value

$this

array getOptions()

Get optional parameters for this field

Return Value

array

$this setIndexType(string|bool $type)

Set the desired index type to use

Parameters

string|bool $type

Either of the types listed in {@link SilverStripe\ORM\FieldType\DBIndexable}, or boolean true to indicate that the default index type should be used.

Return Value

$this

Exceptions

InvalidArgumentException

If $type is not one of TYPE_INDEX, TYPE_UNIQUE or TYPE_FULLTEXT

string|bool getIndexType()

Return the desired index type to use. Will return false if the field instance should not be indexed.

Return Value

string|bool

mixed prepValueForDB(mixed $value)

Return the transformed value ready to be sent to the database. This value will be escaped automatically by the prepared query processor, so it should not be escaped or quoted at all.

Parameters

mixed $value

The value to check

Return Value

mixed

The raw value, or escaped parameterised details

writeToManipulation(array $manipulation)

Write all nested fields into a manipulation

Parameters

array $manipulation

addToQuery(SQLSelect $query)

Add all columns which are defined through {@link requireField()} and {@link $composite_db}, or any additional SQL that is required to get to these columns. Will mostly just write to the {@link SQLSelect->select} array.

Parameters

SQLSelect $query

$this setTable(string $tableName)

Assign this DBField to a table

Parameters

string $tableName

Return Value

$this

string|null getTable()

Get the table this field belongs to, if assigned

Return Value

string|null

string forTemplate()

Determine 'default' casting for this field.

Return Value

string

string HTMLATT()

Gets the value appropriate for a HTML attribute string

Return Value

string

string URLATT()

urlencode this string

Return Value

string

string RAWURLATT()

rawurlencode this string

Return Value

string

string ATT()

Gets the value appropriate for a HTML attribute string

Return Value

string

mixed RAW()

Gets the raw value for this field.

Note: Skips processors implemented via forTemplate()

Return Value

mixed

string JS()

Gets javascript string literal value

Return Value

string

string JSON()

Return JSON encoded value

Return Value

string

string HTML()

Alias for {see XML()}

Return Value

string

string XML()

Return a html5 tag of the appropriate for this file (normally img or a)

Return Value

string

string CDATA()

Safely escape for XML string

Return Value

string

mixed nullValue()

Returns the value to be set in the database to blank this field.

Usually it's a choice between null, 0, and ''

Return Value

mixed

saveInto(DataObject $dataObject)

Saves this field to the given data object.

Parameters

DataObject $dataObject

FormField scaffoldFormField(string $title = null, array $params = null)

Returns a FormField instance used as a default for form scaffolding.

Used by {@link SearchContext}, {@link ModelAdmin}, {@link DataObject::scaffoldFormFields()}

Parameters

string $title

Optional. Localized title of the generated instance

array $params

Return Value

FormField

FormField scaffoldSearchField(string $title = null)

Returns a FormField instance used as a default for searchform scaffolding.

Used by {@link SearchContext}, {@link ModelAdmin}, {@link DataObject::scaffoldFormFields()}.

Parameters

string $title

Optional. Localized title of the generated instance

Return Value

FormField

SearchFilter defaultSearchFilter(string $name = null)

Parameters

string $name

Override name of this field

Return Value

SearchFilter

requireField()

Add the field to the underlying database.

debug()

array getArrayValue()

Return Value

array

$this setArrayValue(array $value)

Parameters

array $value

Return Value

$this

string|array getSchemaValue()

Get formfield schema value

Return Value

string|array

Encoded string for use in formschema response

array getIndexSpecs()

Returns the index specifications for the field instance, for example:

[ 'type' => 'unique', 'columns' => ['FieldName'] ]

Return Value

array

bool scalarValueOnly()

Whether or not this DBField only accepts scalar values.

Composite DBFields can override this method and return false so they can accept arrays of values.

Return Value

bool

array compositeDatabaseFields()

Return array in the format of {@link $composite_db}.

Used by {@link DataObject->hasOwnDatabaseField()}.

Return Value

array

isChanged()

Returns true if this composite field has changed.

For fields bound to a DataObject, this will be cleared when the DataObject is written.

bindTo(DataObject $dataObject)

Bind this field to the dataobject, and set the underlying table to that of the owner

Parameters

DataObject $dataObject

DBField|null dbObject(string $field)

Get a db object for the named field

Parameters

string $field

Field name

Return Value

DBField|null

$this setAllowGeneration(bool $allow)

Set whether image resizes are allowed

Parameters

bool $allow

Return Value

$this

bool getAllowGeneration()

Check if resizes are allowed

Return Value

bool

DBFile existingOnly()

Return clone of self which promises to only return existing thumbnails

Return Value

DBFile

string getString()

Return Value

string

Data from the file in this container

resource getStream()

Return Value

resource

Data stream to the asset in this container

string getURL(bool $grant = true)

Parameters

bool $grant

Ensures that the url for any protected assets is granted for the current user. If set to true, and the file is currently in protected mode, the asset store will ensure the returned URL is accessible for the duration of the current session / user. This will have no effect if the file is in published mode. This will not grant access to users other than the owner of the current session.

Return Value

string

public url to the asset in this container

string getAbsoluteURL()

Get the absolute URL to this resource

Return Value

string

The absolute URL to the asset in this container

array|null getMetaData()

Get metadata for this file

Return Value

array|null

File information

string getMimeType()

Get mime type

Return Value

string

Mime type for this file

int getAbsoluteSize()

Return file size in bytes.

Return Value

int

string getFilename()

Get value of filename

Return Value

string

string getHash()

Get value of hash

Return Value

string

string getVariant()

Get value of variant

Return Value

string

bool getIsImage()

Determine if a valid non-empty image exists behind this asset, which is a format compatible with image manipulations

Return Value

bool

AssetContainer Pad(int $width, int $height, string $backgroundColor = 'FFFFFF', int $transparencyPercent = 0)

Fit image to specified dimensions and fill leftover space with a solid colour (default white). Use in templates with $Pad.

Parameters

int $width

The width to size to

int $height

The height to size to

string $backgroundColor
int $transparencyPercent

Level of transparency

Return Value

AssetContainer

AssetContainer Resampled()

Forces the image to be resampled, if possible

Return Value

AssetContainer

updateURL(string $url)

Update the url to point to a resampled version if forcing

Parameters

string $url

AssetContainer ResizedImage(int $width, int $height)

Generate a resized copy of this image with the given width & height.

This can be used in templates with $ResizedImage but should be avoided, as it's the only image manipulation function which can skew an image.

Parameters

int $width

Width to resize to

int $height

Height to resize to

Return Value

AssetContainer

AssetContainer Fit(int $width, int $height)

Scale image proportionally to fit within the specified bounds

Parameters

int $width

The width to size within

int $height

The height to size within

Return Value

AssetContainer

AssetContainer FitMax(int $width, int $height)

Proportionally scale down this image if it is wider or taller than the specified dimensions.

Similar to Fit but without up-sampling. Use in templates with $FitMax.

Parameters

int $width

The maximum width of the output image

int $height

The maximum height of the output image

Return Value

AssetContainer

AssetContainer ScaleWidth(int $width)

Scale image proportionally by width. Use in templates with $ScaleWidth.

Parameters

int $width

The width to set

Return Value

AssetContainer

AssetContainer ScaleMaxWidth(int $width)

Proportionally scale down this image if it is wider than the specified width.

Similar to ScaleWidth but without up-sampling. Use in templates with $ScaleMaxWidth.

Parameters

int $width

The maximum width of the output image

Return Value

AssetContainer

AssetContainer ScaleHeight(int $height)

Scale image proportionally by height. Use in templates with $ScaleHeight.

Parameters

int $height

The height to set

Return Value

AssetContainer

AssetContainer ScaleMaxHeight(int $height)

Proportionally scale down this image if it is taller than the specified height.

Similar to ScaleHeight but without up-sampling. Use in templates with $ScaleMaxHeight.

Parameters

int $height

The maximum height of the output image

Return Value

AssetContainer

AssetContainer CropWidth(int $width)

Crop image on X axis if it exceeds specified width. Retain height.

Use in templates with $CropWidth. Example: $Image.ScaleHeight(100).$CropWidth(100)

Parameters

int $width

The maximum width of the output image

Return Value

AssetContainer

AssetContainer CropHeight(int $height)

Crop image on Y axis if it exceeds specified height. Retain width.

Use in templates with $CropHeight. Example: $Image.ScaleWidth(100).CropHeight(100)

Parameters

int $height

The maximum height of the output image

Return Value

AssetContainer

AssetContainer FillMax(int $width, int $height)

Crop this image to the aspect ratio defined by the specified width and height, then scale down the image to those dimensions if it exceeds them.

Similar to Fill but without up-sampling. Use in templates with $FillMax.

Parameters

int $width

The relative (used to determine aspect ratio) and maximum width of the output image

int $height

The relative (used to determine aspect ratio) and maximum height of the output image

Return Value

AssetContainer

AssetContainer Fill(int $width, int $height)

Resize and crop image to fill specified dimensions.

Use in templates with $Fill

Parameters

int $width

Width to crop to

int $height

Height to crop to

Return Value

AssetContainer

AssetContainer Quality(int $quality)

Set the quality of the resampled image

Parameters

int $quality

Quality level from 0 - 100

Return Value

AssetContainer

Exceptions

InvalidArgumentException

DBFile|DBHTMLText CMSThumbnail()

Default CMS thumbnail

Return Value

DBFile|DBHTMLText

Either a resized thumbnail, or html for a thumbnail icon

AssetContainer|DBHTMLText StripThumbnail()

Generates a thumbnail for use in the gridfield view

Return Value

AssetContainer|DBHTMLText

Either a resized thumbnail, or html for a thumbnail icon

AssetContainer|DBHTMLText PreviewThumbnail()

Get preview for this file

Return Value

AssetContainer|DBHTMLText

Either a resized thumbnail, or html for a thumbnail icon

AssetContainer Thumbnail(int $width, int $height)

Default thumbnail generation for Images

Parameters

int $width
int $height

Return Value

AssetContainer

AssetContainer|DBHTMLText ThumbnailIcon(int $width, int $height)

Thubnail generation for all file types.

Resizes images, but returns an icon <img /> tag if this is not a resizable image

Parameters

int $width
int $height

Return Value

AssetContainer|DBHTMLText

DBHTMLText IconTag()

Get HTML for img containing the icon for this file

Return Value

DBHTMLText

string ThumbnailURL(int $width, int $height)

Get URL to thumbnail of the given size.

May fallback to default icon

Parameters

int $width
int $height

Return Value

string

string getIcon()

Return the relative URL of an icon for the file type, based on the {@link appCategory()} value.

Images are searched for in "framework/images/app_icons/".

Return Value

string

URL to icon

Image_Backend getImageBackend()

Get Image_Backend instance for this image

Return Value

Image_Backend

$this setImageBackend(Image_Backend $backend)

Parameters

Image_Backend $backend

Return Value

$this

int getWidth()

Get the width of this image.

Return Value

int

int getHeight()

Get the height of this image.

Return Value

int

int getOrientation()

Get the orientation of this image.

Return Value

int

ORIENTATION_SQUARE | ORIENTATION_PORTRAIT | ORIENTATION_LANDSCAPE

bool isSize(int $width, int $height)

Determine if this image is of the specified size

Parameters

int $width

Width to check

int $height

Height to check

Return Value

bool

bool isWidth(int $width)

Determine if this image is of the specified width

Parameters

int $width

Width to check

Return Value

bool

bool isHeight(int $height)

Determine if this image is of the specified width

Parameters

int $height

Height to check

Return Value

bool

DBFile manipulateImage(string $variant, callable $callback)

Wrapper for manipulate that passes in and stores Image_Backend objects instead of tuples

Parameters

string $variant
callable $callback

Callback which takes an Image_Backend object, and returns an Image_Backend result. If this callback returns true then the current image will be duplicated without modification.

Return Value

DBFile

The manipulated file

DBFile manipulate(string $variant, callable $callback)

Generate a new DBFile instance using the given callback if it hasn't been created yet, or return the existing one if it has.

Parameters

string $variant

name of the variant to create

callable $callback

Callback which should return a new tuple as an array. This callback will be passed the backend, filename, hash, and variant This will not be called if the file does not need to be created.

Return Value

DBFile

The manipulated file

string variantName(string $format, $arg = null)

Name a variant based on a format with arbitrary parameters

Parameters

string $format

The format name.

$arg

Return Value

string

array|null variantParts($variantName)

Reverses {@link variantName()}.

The "format" part of a variant name is a method name on the owner of this trait. For legacy reasons, there's no delimiter between this part, and the encoded arguments. This means we have to use a whitelist of "known formats", based on methods available on the {@link Image} class as the "main" user of this trait. This class is commonly decorated with additional manipulation methods through {@link DataExtension}.

Parameters

$variantName

Return Value

array|null

An array of arguments passed to {@link variantName}. The first item is the "format".

Exceptions

InvalidArgumentException

AssetContainer setAttribute(string $name, mixed $value)

Add a HTML attribute when rendering this object. This method is immutable, it will return you a copy of the original object.

Parameters

string $name
mixed $value

Return Value

AssetContainer

mixed|null getAttribute($name)

Retrieve the value of an HTML attribute

Parameters

$name

Return Value

mixed|null

array getAttributes()

Allows customization through an 'updateAttributes' hook on the base class.

Existing attributes are passed in as the first argument and can be manipulated, but any attributes added through a subclass implementation won't be included.

Return Value

array

string getAttributesHTML(array $attributes = null)

Custom attributes to process. Falls back to {@link getAttributes()}.

If at least one argument is passed as a string, all arguments act as excludes, by name.

Parameters

array $attributes

Return Value

string

bool IsLazyLoaded()

Determine whether the image should be lazy loaded

Return Value

bool

AssetContainer LazyLoad(mixed $lazyLoad)

Set the lazy loading state for this Image

Parameters

mixed $lazyLoad

Return Value

AssetContainer

string getTag()

Return a html5 tag of the appropriate for this file (normally img or a)

Return Value

string

string getFrontendTemplate()

Determine the template to render as on the frontend

Return Value

string

Name of template

string getBasename()

Get trailing part of filename

Return Value

string

string getExtension()

Get file extension

Return Value

string

string getTitle()

Alt title for this

Return Value

string

array setFromLocalFile(string $path, string $filename = null, string $hash = null, string $variant = null, array $config = [])

Assign a local file to the backend.

Parameters

string $path

Absolute filesystem path to file

string $filename

Optional path to ask the backend to name as. Will default to the filename of the $path, excluding directories.

string $hash

Hash of original file, if storing a variant.

string $variant

Name of variant, if storing a variant.

array $config

Write options. {see \SilverStripe\Assets\Storage\AssetStore}

Return Value

array

Tuple associative array (Filename, Hash, Variant) Unless storing a variant, the hash will be calculated from the local file content.

array setFromStream(resource $stream, string $filename, string $hash = null, string $variant = null, array $config = [])

Assign a stream to the backend

Parameters

resource $stream

Streamable resource

string $filename

Name for the resulting file

string $hash

Hash of original file, if storing a variant.

string $variant

Name of variant, if storing a variant.

array $config

Write options. {see \SilverStripe\Assets\Storage\AssetStore}

Return Value

array

Tuple associative array (Filename, Hash, Variant) Unless storing a variant, the hash will be calculated from the raw stream.

array setFromString(string $data, string $filename, string $hash = null, string $variant = null, array $config = [])

Assign a set of data to the backend

Parameters

string $data

Raw binary/text content

string $filename

Name for the resulting file

string $hash

Hash of original file, if storing a variant.

string $variant

Name of variant, if storing a variant.

array $config

Write options. {see \SilverStripe\Assets\Storage\AssetStore}

Return Value

array

Tuple associative array (Filename, Hash, Variant) Unless storing a variant, the hash will be calculated from the given data.

Return URL for this image. Alias for getURL()

Return Value

string

Return absolute URL for this image. Alias for getAbsoluteURL()

Return Value

string

string getSourceURL(bool $grant = true)

Get URL, but without resampling.

Note that this will return the url even if the file does not exist.

Parameters

bool $grant

Ensures that the url for any protected assets is granted for the current user.

Return Value

string

string getVisibility()

Determine visibility of the given file

Return Value

string

one of values defined by the constants VISIBILITY_PROTECTED or VISIBILITY_PUBLIC, or null if the file does not exist

$this setOriginal(AssetContainer $original)

Customise this object with an "original" record for getting other customised fields

Parameters

AssetContainer $original

Return Value

$this

array getAllowedCategories()

Get list of allowed file categories

Return Value

array

$this setAllowedCategories(array|string $categories)

Assign allowed categories

Parameters

array|string $categories

Return Value

$this

bool validate(ValidationResult $result, string $filename = null)

Hook to validate this record against a validation result

Parameters

ValidationResult $result
string $filename

Optional filename to validate. If omitted, the current value is validated.

Return Value

bool

Valid flag

string|false getSize()

Returns the size of the file type in an appropriate format.

Return Value

string|false

String value, or false if doesn't exist

bool deleteFile()

Delete a file (and all variants).

{see \SilverStripe\Assets\Storage\AssetStore::delete()}

Return Value

bool

Flag if a file was deleted

publishFile()

Publicly expose the file (and all variants) identified by the given filename and hash {see AssetStore::publish}

protectFile()

Protect a file (and all variants) from public access, identified by the given filename and hash.

{see \SilverStripe\Assets\Storage\AssetStore::protect()}

grantFile()

Ensures that access to the specified protected file is granted for the current user.

If this file is currently in protected mode, the asset store will ensure the returned asset for the duration of the current session / user. This will have no effect if the file is in published mode. This will not grant access to users other than the owner of the current session. Does not require a member to be logged in.

revokeFile()

Revoke access to the given file for the current user.

Note: This will have no effect if the given file is public

bool canViewFile()

Check if the current user can view the given file.

Return Value

bool

True if the file is verified and grants access to the current session / user.

string renameFile(string $newName)

Rename to new filename, and point to new file

Parameters

string $newName

Return Value

string

Updated Filename

string copyFile(string $newName)

Copy to new filename.

This will not automatically point to the new file (as renameFile() does)

Parameters

string $newName

Return Value

string

Updated filename