class FormTemplateHelper (View source)

A helper class for managing Form} and {@link FormField HTML template output.

This primarily exists to maintain backwards compatibility between Form and FormField template changes since developers may rely on specific HTML output in their applications. Any core changes to templates (such as changing ID's) may have the potential to silently prevent websites from working.

To provide a form with a custom FormTemplateHelper use the following snippet:

$form->setTemplateHelper('ClassName');

Globally, the FormTemplateHelper can be set via the Injector API.

Traits

A class that can be instantiated or replaced via DI

Methods

public static 
create(mixed ...$args)

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

public static 
singleton(string $class = null)

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

public
string
generateFormID(Form $form)

No description

public
string
generateFieldHolderID(FormField $field)

No description

public
string
generateFieldID(FormField $field)

Generate the field ID value

Details

static Injectable create(mixed ...$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::class); $list = SiteTree::get();

Parameters

mixed ...$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

string generateFormID(Form $form)

No description

Parameters

Form $form

Return Value

string

string generateFieldHolderID(FormField $field)

No description

Parameters

FormField $field

Return Value

string

string generateFieldID(FormField $field)

Generate the field ID value

Parameters

FormField $field

Return Value

string