Assets

Type
Class
Namespace
craft\fields
Inherits
craft\fields\Assets » craft\fields\BaseRelationField » craft\base\Field » craft\base\SavableComponent » craft\base\ConfigurableComponent » craft\base\Component » craft\base\Model » yii\base\Model » yii\base\Component » yii\base\BaseObject
Implements
ArrayAccess, IteratorAggregate, craft\base\ComponentInterface, craft\base\ConfigurableComponentInterface, craft\base\EagerLoadingFieldInterface, craft\base\FieldInterface, craft\base\PreviewableFieldInterface, craft\base\SavableComponentInterface, yii\base\Arrayable, yii\base\Configurable, yii\base\StaticInstanceInterface
Uses traits
craft\base\ClonefixTrait, craft\base\FieldTrait, craft\base\SavableComponentTrait, yii\base\ArrayableTrait, yii\base\StaticInstanceTrait
Since
3.0.0

Assets represents an Assets field.

View source

# Public Properties

Property Description
activeValidators yii\validators\Validator – The validators applicable to the current scenario.
allowLimit boolean – Whether to allow the Limit setting
allowMultipleSources boolean – Whether to allow multiple source selection in the settings
allowSelfRelations boolean – Whether elements should be allowed to relate themselves.
allowedKinds array, null – The file kinds that the field should be restricted to (only used if restrictFiles is true)
attributes array – Attribute values (name => value).
behaviors yii\base\Behavior – List of behaviors attached to this component
columnPrefix string, null – The field’s content column prefix
contentColumnType string – The column type.
contentGqlMutationArgumentType \GraphQL\Type\Definition\Type, array
contentGqlQueryArgumentType \GraphQL\Type\Definition\Type, array
contentGqlType \GraphQL\Type\Definition\Type, array
context string, null – The field’s context
dateCreated DateTime, null – The date that the component was created
dateUpdated DateTime, null – The date that the component was last updated
defaultUploadLocationSource string, null – Where files should be uploaded to by default, in format "folder:X", where X is the craft\models\VolumeFolder ID (only used if useSingleFolder is false)
defaultUploadLocationSubpath string, null – The subpath that files should be uploaded to by default (only used if useSingleFolder is false)
eagerLoadingGqlConditions array, false
elementValidationRules array
errors array – Errors for all attributes or the specified attribute.
fileKindOptions array
firstErrors array – The first errors.
group craft\records\FieldGroup, null
groupId integer, null – The field’s group’s ID
handle string, null – The field’s handle
id integer, string, null – The component’s ID (could be a temporary one: "new:X")
instructions string, null – The field’s instructions
isNew boolean – Whether the component is new
isTranslatable boolean
iterator ArrayIterator – An iterator for traversing the items in the list.
layoutId integer, null – The ID of the field layout that the field was fetched from
limit integer, null – The maximum number of relations this field can have (used if allowLimit is set to true)
localizeRelations integer – Whether each site should get its own unique set of relations
name string, null – The field’s name
oldHandle string, null – The field’s previous handle
oldSettings array, null – The field’s previous settings
previewMode string – How related assets should be presented within element index views.
required boolean, null – Whether the field is required in the field layout it was fetched from
restrictFiles boolean, null – Whether the available assets should be restricted to allowedKinds
scenario string – The scenario that this model is in.
searchable boolean – Whether the field's values should be registered as search keywords on the elements.
selectionLabel string, null – The label that should be used on the selection input
settings array – The component’s settings.
settingsHtml string, null
showSiteMenu boolean – Whether the site menu should be shown in element selector modals.
showUnpermittedFiles boolean – Whether to show files the user doesn’t have permission to view, per the “View files uploaded by other users” permission.
showUnpermittedVolumes boolean – Whether to show input sources for volumes the user doesn’t have permission to view.
singleUploadLocationSource string, null – Where files should be restricted to, in format "folder:X", where X is the craft\models\VolumeFolder ID (only used if useSingleFolder is true)
singleUploadLocationSubpath string, null – The subpath that files should be restricted to (only used if useSingleFolder is true)
sortOption array
sortOrder integer, null – The field’s sort position in the field layout it was fetched from
source string, null – The source key that this field can relate elements from (used if allowMultipleSources is set to false)
sourceOptions array
sources string, string[], null – The source keys that this field can relate elements from (used if allowMultipleSources is set to true)
tabId integer, null – The tab ID of the field layout that the field was fetched from
targetSiteFieldHtml string, null
targetSiteId string, null – The UID of the site that this field should relate elements from
translationDescription string, null
translationKeyFormat string, null – The field’s translation key format, if translationMethod is "custom"
translationMethod string – The field’s translation method
uid string, null – The field's UID
useSingleFolder boolean – Whether related assets should be limited to a single folder
validateRelatedElements boolean – Whether related elements should be validated when the source element is saved.
validators ArrayObject, yii\validators\Validator – All the validators declared in the model.
viewMode string, null – The view mode
viewModeFieldHtml string, null

# allowedKinds

Type
array, null

The file kinds that the field should be restricted to (only used if restrictFiles is true)

View source

# contentGqlType

Type
\GraphQL\Type\Definition\Type, array
Access
Read-only
Since
3.3.0

View source

# defaultUploadLocationSource

Type
string, null

Where files should be uploaded to by default, in format "folder:X", where X is the craft\models\VolumeFolder ID (only used if useSingleFolder is false)

View source

# defaultUploadLocationSubpath

Type
string, null

The subpath that files should be uploaded to by default (only used if useSingleFolder is false)

View source

# eagerLoadingGqlConditions

Type
array, false
Access
Read-only
Since
3.3.0

View source

# elementValidationRules

Type
array
Access
Read-only

View source

# fileKindOptions

Type
array
Access
Read-only

View source

# previewMode

Type
string
Since
3.5.11

How related assets should be presented within element index views.

View source

# restrictFiles

Type
boolean, null

Whether the available assets should be restricted to allowedKinds

View source

# settingsHtml

Type
string, null
Access
Read-only

View source

# showUnpermittedFiles

Type
boolean
Since
3.4.0

Whether to show files the user doesn’t have permission to view, per the “View files uploaded by other users” permission.

View source

# showUnpermittedVolumes

Type
boolean
Since
3.4.0

Whether to show input sources for volumes the user doesn’t have permission to view.

View source

# singleUploadLocationSource

Type
string, null

Where files should be restricted to, in format "folder:X", where X is the craft\models\VolumeFolder ID (only used if useSingleFolder is true)

View source

# singleUploadLocationSubpath

Type
string, null

The subpath that files should be restricted to (only used if useSingleFolder is true)

View source

# sourceOptions

Type
array
Access
Read-only

View source

# useSingleFolder

Type
boolean

Whether related assets should be limited to a single folder

View source

# Protected Properties

Property Description
allowLargeThumbsView boolean – Whether to allow the “Large Thumbnails” view mode
inputJsClass string, null – The JS class that should be initialized for the input
inputTemplate string – Template to use for field rendering
settingsTemplate string – Template to use for settings rendering
sortable boolean – Whether the elements have a custom sort order

# allowLargeThumbsView

Type
boolean

Whether to allow the “Large Thumbnails” view mode

View source

# inputJsClass

Type
string, null

The JS class that should be initialized for the input

View source

# inputTemplate

Type
string

Template to use for field rendering

View source

# settingsTemplate

Type
string

Template to use for settings rendering

View source

# Public Methods

Method Description
__call() Calls the named method which is not a class method.
__clone()
__construct() Constructor.
__get() Returns the value of an object property.
__isset() Checks if a property is set, i.e. defined and not null.
__set() Sets value of an object property.
__toString() Use the translated field name as the string representation.
__unset() Sets an object property to null.
_volumeIdBySourceKey() Returns a volume ID from an upload source key.
activeAttributes() Returns the attribute names that are subject to validation in the current scenario.
addError() Adds a new error to the specified attribute.
addErrors() Adds a list of errors.
addModelErrors() Adds errors from another model, with a given attribute name prefix.
afterDelete() Performs actions after a component is deleted.
afterElementDelete() Performs actions after the element has been deleted.
afterElementPropagate() Performs actions after the element has been fully saved and propagated to other sites.
afterElementRestore() Performs actions after the element has been restored.
afterElementSave() Performs actions after the element has been saved.
afterSave() Performs actions after a component is saved.
afterValidate() This method is invoked after validation ends.
attachBehavior() Attaches a behavior to this component.
attachBehaviors() Attaches a list of behaviors to the component.
attributeHints() Returns the attribute hints.
attributeLabels() Returns the attribute labels.
attributes() Returns the list of attribute names.
beforeApplyDelete() Performs actions before a component delete is applied to the database.
beforeDelete() Performs actions before a component is deleted.
beforeElementDelete() Performs actions before an element is deleted.
beforeElementRestore() Performs actions before an element is restored.
beforeElementSave() Performs actions before an element is saved.
beforeSave() Performs actions before a component is saved.
beforeValidate() This method is invoked before validation starts.
behaviors() Returns a list of behaviors that this component should behave as.
canGetProperty() Returns a value indicating whether a property can be read.
canSetProperty() Returns a value indicating whether a property can be set.
className() Returns the fully qualified name of this class.
clearErrors() Removes errors for all attributes or a single attribute.
createValidators() Creates validator objects based on the validation rules specified in rules().
datetimeAttributes() Returns the names of any attributes that should hold DateTime values.
defaultSelectionLabel() Returns the default selectionLabel value.
detachBehavior() Detaches a behavior from the component.
detachBehaviors() Detaches all behaviors from the component.
displayName() Returns the display name of this class.
ensureBehaviors() Makes sure that the behaviors declared in behaviors() are attached to this component.
extraFields() Returns the list of fields that can be expanded further and returned by toArray().
fields() Returns the list of fields that should be returned by default by toArray() when no specific fields are specified.
formName() Returns the form name that this model class should use.
generateAttributeLabel() Generates a user friendly attribute label based on the give attribute name.
getActiveValidators() Returns the validators applicable to the current scenario.
getAttributeHint() Returns the text hint for the specified attribute.
getAttributeLabel() Returns the text label for the specified attribute.
getAttributes() Returns attribute values.
getBehavior() Returns the named behavior object.
getBehaviors() Returns all behaviors attached to this component.
getContentColumnType() Returns the column type that this field should get within the content table.
getContentGqlMutationArgumentType() Returns the GraphQL type to be used as an argument in mutations for this field type.
getContentGqlQueryArgumentType() Returns the GraphQL type to be used as an argument in queries for this field type.
getContentGqlType() Returns the GraphQL type to be used for this field type.
getEagerLoadingGqlConditions() Returns an array that lists the scopes this custom field allows when eager-loading or false if eager-loading should not be allowed in the GraphQL context.
getEagerLoadingMap() Returns an array that maps source-to-target element IDs based on this custom field.
getElementValidationRules() Returns the validation rules for an element with this field.
getError() Returns the first error of the specified attribute.
getErrorSummary() Returns the errors for all attributes as a one-dimensional array.
getErrors() Returns the errors for all attributes or a single attribute.
getFileKindOptions() Returns the available file kind options for the settings
getFirstError() Returns the first error of the specified attribute.
getFirstErrors() Returns the first error of every attribute in the model.
getGroup() Returns the field’s group.
getInputHtml() Returns the field’s input HTML.
getIsNew() Returns whether the component is new (unsaved).
getIsTranslatable() Returns whether the field should be shown as translatable in the UI.
getIterator() Returns an iterator for traversing the attributes in the model.
getScenario() Returns the scenario that this model is used in.
getSearchKeywords() Returns the search keywords that should be associated with this field.
getSettings() Returns an array of the component’s settings.
getSettingsHtml() Returns the component’s settings HTML.
getSortOption() Returns the sort option array that should be included in the element’s sortOptions() response.
getSourceOptions() Normalizes the available sources into select input options.
getStaticHtml() Returns a static (non-editable) version of the field’s input HTML.
getTableAttributeHtml() Returns the HTML that should be shown for this field in Table View.
getTargetSiteFieldHtml() Returns the HTML for the Target Site setting.
getTranslationDescription() Returns the description of this field’s translation support.
getTranslationKey() Returns the field’s translation key, based on a given element.
getValidators() Returns all the validators declared in rules().
getViewModeFieldHtml() Returns the HTML for the View Mode setting.
hasContentColumn() Returns whether this field has a column in the content table.
hasErrors() Returns a value indicating whether there is any validation error.
hasEventHandlers() Returns a value indicating whether there is any handler attached to the named event.
hasMethod() Returns a value indicating whether a method is defined.
hasProperty() Returns a value indicating whether a property is defined.
init() Initializes the object.
instance() Returns static class instance, which can be used to obtain meta information.
isAttributeActive() Returns a value indicating whether the attribute is active in the current scenario.
isAttributeRequired() Returns a value indicating whether the attribute is required.
isAttributeSafe() Returns a value indicating whether the attribute is safe for massive assignments.
isEmpty()
isSelectable() Returns whether the component should be selectable in component Type selects.
isValueEmpty() Returns whether the given value should be considered “empty” to a validator.
load() Populates the model with input data.
loadMultiple() Populates a set of models with the data from end user.
modifyElementIndexQuery() Modifies an element index query.
modifyElementsQuery() Modifies an element query.
normalizeValue() Normalizes the field’s value for use.
off() Detaches an existing event handler from this component.
offsetExists() Returns whether there is an element at the specified offset.
offsetGet() Returns the element at the specified offset.
offsetSet() Sets the element at the specified offset.
offsetUnset() Sets the element value at the specified offset to null.
on() Attaches an event handler to an event.
onUnsafeAttribute() This method is invoked when an unsafe attribute is being massively assigned.
resolveDynamicPathToFolderId() Resolve source path for uploading for this field.
rules() Returns the validation rules for attributes.
safeAttributes() Returns the attribute names that are safe to be massively assigned in the current scenario.
scenarios() Returns a list of scenarios and the corresponding active attributes.
serializeValue() Prepares the field’s value to be stored somewhere, like the content table.
setAttributes() Sets the attribute values in a massive way.
setIsFresh() Sets whether the field is fresh.
setScenario() Sets the scenario for the model.
settingsAttributes() Returns the list of settings attribute names.
supportedTranslationMethods() Returns which translation methods the field supports.
toArray() Converts the model into an array.
trigger() Triggers an event.
validate() Performs the data validation.
validateFileSize() Validates the files to make sure they are one of the allowed file kinds.
validateFileType() Validates the files to make sure they are one of the allowed file kinds.
validateMultiple() Validates multiple models.
validateRelatedElements() Validates the related elements.
valueType() Returns the PHPDoc type this field’s values will have.

# __construct()

Constructor.

The default implementation does two things:

  • Initializes the object with the given configuration $config.
  • Call init().

If this method is overridden in a child class, it is recommended that

  • the last parameter of the constructor is a configuration array, like $config here.
  • call the parent implementation at the end of the constructor.

View source

Arguments

  • $config (array) – Name-value pairs that will be used to initialize the object properties

# _volumeIdBySourceKey()

Returns a volume ID from an upload source key.

View source

Arguments

Returns

integer, null

# afterElementSave()

Performs actions after the element has been saved.

View source

Arguments

# defaultSelectionLabel()

Returns the default selectionLabel value.

View source

Returns

string – The default selection label

# displayName()

Returns the display name of this class.

View source

Returns

string – The display name of this class.

# getContentGqlType()

Since
3.3.0

Returns the GraphQL type to be used for this field type.

View source

Returns

\GraphQL\Type\Definition\Type, array

# getEagerLoadingGqlConditions()

Since
3.3.0

Returns an array that lists the scopes this custom field allows when eager-loading or false if eager-loading should not be allowed in the GraphQL context.

View source

Returns

array, false

# getElementValidationRules()

Returns the validation rules for an element with this field.

Rules should be defined in the array syntax required by yii\base\Model::rules(), with one difference: you can skip the first argument (the attribute list).

[
    // explicitly specify the field attribute
    [$this->handle, 'string', 'min' => 3, 'max' => 12],
    // skip the field attribute
    ['string', 'min' => 3, 'max' => 12],
    // you can only pass the validator class name/handle if not setting any params
    'bool',
]

To register validation rules that should only be enforced for live elements, set the rule scenario to live:

[
    ['string', 'min' => 3, 'max' => 12, 'on' => \craft\base\Element::SCENARIO_LIVE],
]

View source

Returns

array

# getFileKindOptions()

Returns the available file kind options for the settings

View source

Returns

array

# getSettingsHtml()

Returns the component’s settings HTML.

An extremely simple implementation would be to directly return some HTML:

return '<textarea name="foo">'.$this->foo.'</textarea>';

For more complex settings, you might prefer to create a template, and render it via craft\web\View::renderTemplate(). For example, the following code would render a template located at src/templates/_settings.html, passing the settings to it:

return Craft::$app->view->renderTemplate('plugin-handle/_widget-settings', [
    'widget' => $this
]);

If you need to tie any JavaScript code to your settings, it’s important to know that any name and id attributes within the returned HTML will probably get namespaced, however your JavaScript code will be left untouched. For example, if getSettingsHtml() returns the following HTML:

<textarea id="foo" name="foo"></textarea>
<script type="text/javascript">
    var textarea = document.getElementById('foo');
</script>

…then it might actually look like this before getting output to the browser:

<textarea id="namespace-foo" name="namespace[foo]"></textarea>
<script type="text/javascript">
    var textarea = document.getElementById('foo');
</script>

As you can see, that JavaScript code will not be able to find the textarea, because the textarea’s id attribute was changed from foo to namespace-foo. Before you start adding namespace- to the beginning of your element ID selectors, keep in mind that the actual namespace is going to change depending on the context. Often they are randomly generated. So it’s not quite that simple.

Thankfully, Craft provides a couple handy methods that can help you deal with this:

So here’s what a getSettingsHtml() method that includes field-targeting JavaScript code might look like:

public function getSettingsHtml()
{
    // Figure out what the ID is going to be namespaced into
    $id = 'foo';
    $namespacedId = Craft::$app->view->namespaceInputId($id);
    // Render and return the input template
    return Craft::$app->view->renderTemplate('plugin-handle/_widget-settings', [
        'id' => $id,
        'namespacedId' => $namespacedId,
        'widget' => $this,
    ]);
}

And the _widget-settings.twig template might look like this:

<textarea id="{{ id }}" name="foo">{{ widget.foo }}</textarea>
<script type="text/javascript">
    var textarea = document.getElementById('{{ namespacedId }}');
</script>

The same principles also apply if you’re including your JavaScript code with craft\web\View::registerJs().

View source

Returns

string, null

# getSourceOptions()

Normalizes the available sources into select input options.

View source

Returns

array

# init()

Initializes the object.

This method is invoked at the end of the constructor after the object is initialized with the given configuration.

View source

# isValueEmpty()

Returns whether the given value should be considered “empty” to a validator.

View source

Arguments

  • $value (mixed) – The field’s value
  • $element (craft\base\ElementInterface) – The element the field is associated with, if there is one

Returns

boolean – Whether the value should be considered “empty”

# normalizeValue()

Normalizes the field’s value for use.

This method is called when the field’s value is first accessed from the element. For example, the first time element.myFieldHandle is called from a template, or right before getInputHtml() is called. Whatever this method returns is what element.myFieldHandle will likewise return, and what getInputHtml()’s and serializeValue()’s $value arguments will be set to.

The value passed into this method will vary depending on the context.

  • If a new, unsaved element is being edited for the first time (such as an entry within a Quick Post widget on the Dashboard), the value will be null.
  • If an element is currently being saved, the value will be the field’s POST data.
  • If an existing element was retrieved from the database, the value will be whatever is stored in the field’s content table column. (Or if the field doesn’t have a content table column per hasContentColumn(), the value will be null.)

View source

Arguments

Returns

mixed – The prepared field value

# resolveDynamicPathToFolderId()

Resolve source path for uploading for this field.

View source

Arguments

Returns

integer

# validateFileSize()

Validates the files to make sure they are one of the allowed file kinds.

View source

Arguments

# validateFileType()

Validates the files to make sure they are one of the allowed file kinds.

View source

Arguments

# valueType()

Since
3.2.0

Returns the PHPDoc type this field’s values will have.

It will be used by the generated CustomFieldBehavior class.

If the values can be of more than one type, return multiple types separated by |s.

public static function phpDocType()
{
     return 'int|mixed|\\craft\\elements\\db\\ElementQuery';
}

View source

Returns

string

# Protected Methods

Method Description
availableSources() Returns the sources that should be available to choose from within the field's settings
defineRules() Returns the validation rules for attributes.
elementPreviewHtml() Renders a related element’s HTML for the element index.
elementType() Returns the element class associated with this field type.
extractFieldsFor() Extract nested fields from a fields collection for a given root field Nested fields are separated with dots (.). e.g: "item.id" The previous example would extract "id".
extractRootFields() Extracts the root field names from nested fields.
inputHtml() Returns the field’s input HTML.
inputSelectionCriteria() Returns any additional criteria parameters limiting which elements the field should be able to select.
inputSiteId() Returns the site ID that the input should select elements from.
inputSources() Returns an array of the source keys the field should be able to select elements from.
inputTemplateVariables() Returns an array of variables that should be passed to the input template.
isFresh() Returns whether this is the first time the element's content has been edited.
requestParamName() Returns the field’s param name on the request.
resolveFields() Determines which fields can be returned by toArray().
searchKeywords() Returns the search keywords that should be associated with this field.
settingsTemplateVariables() Returns an array of variables that should be passed to the settings template.
supportedViewModes() Returns the field’s supported view modes.
targetSiteId() Returns the site ID that target elements should have.
viewMode() Returns the field’s current view mode.

# defineRules()

Since
3.4.9

Returns the validation rules for attributes.

See rules() for details about what should be returned.

Models should override this method instead of rules() so EVENT_DEFINE_RULES handlers can modify the class-defined rules.

View source

Returns

array

# elementPreviewHtml()

Since
3.5.11

Renders a related element’s HTML for the element index.

View source

Arguments

Returns

string

# elementType()

Returns the element class associated with this field type.

View source

Returns

string – The Element class name

Throws

# inputHtml()

Since
3.5.0

Returns the field’s input HTML.

View source

Arguments

  • $value (mixed) – The field’s value. This will either be the normalized value, raw POST data (i.e. if there was a validation error), or null
  • $element (craft\base\ElementInterface, null) – The element the field is associated with, if there is one

Returns

string – The input HTML.

# inputSelectionCriteria()

Returns any additional criteria parameters limiting which elements the field should be able to select.

View source

Returns

array

# inputSiteId()

Since
3.4.19

Returns the site ID that the input should select elements from.

View source

Arguments

Returns

integer, null

# inputSources()

Returns an array of the source keys the field should be able to select elements from.

View source

Arguments

Returns

array, string

# inputTemplateVariables()

Returns an array of variables that should be passed to the input template.

View source

Arguments

Returns

array

# Constants

Constant Description
PREVIEW_MODE_FULL
PREVIEW_MODE_THUMBS
SCENARIO_DEFAULT The name of the default scenario.
TRANSLATION_METHOD_CUSTOM
TRANSLATION_METHOD_LANGUAGE
TRANSLATION_METHOD_NONE
TRANSLATION_METHOD_SITE
TRANSLATION_METHOD_SITE_GROUP