NestedElementManager

Type: Class
Namespace: craft\elements
Inherits: craft\elements\NestedElementManager » yii\base\Component » yii\base\BaseObject
Implements: yii\base\Configurable
Since: 5.0.0

Nested Element Manager

This can be used by elements or fields to manage nested elements, such as users → addresses, or Matrix fields → nested entries.

If this is for a custom field, field must be set. Otherwise, attribute must be set.

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Public Properties

Property	Description
attribute	string, null – The attribute name used to access nested elements.
behaviors	yii\base\Behavior – List of behaviors attached to this component.
criteria	array – Additional element query params that should be set when fetching nested elements.
field	craft\base\FieldInterface, null – The field associated with this nested element manager.
isTranslatable	boolean
ownerIdParam	string – The name of the element query param that nested elements use to associate with the owner’s ID
primaryOwnerIdParam	string – The name of the element query param that nested elements use to associate with the primary owner’s ID
propagationKeyFormat	string, null – The propagation key format that the nested elements should use, if propagationMethod is set to `PropagationMethod::Custom`.
propagationMethod	`\craft\enums\PropagationMethod` – The propagation method that the nested elements should use.
translationDescription	string, null
valueGetter	Closure, null – Closure that will get the value.
valueSetter	Closure, null, false – Closure that will update the value.

`attribute`

Type: string, null
Default value: null

The attribute name used to access nested elements.

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`criteria`

Type: array
Default value: []

Additional element query params that should be set when fetching nested elements.

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`field`

Type: craft\base\FieldInterface, null
Default value: null

The field associated with this nested element manager.

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`isTranslatable`

Type: boolean
Default value: null
Access: Read-only

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`ownerIdParam`

Type: string
Default value: 'ownerId'

The name of the element query param that nested elements use to associate with the owner’s ID

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`primaryOwnerIdParam`

Type: string
Default value: 'primaryOwnerId'

The name of the element query param that nested elements use to associate with the primary owner’s ID

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`propagationKeyFormat`

Type: string, null
Default value: null

The propagation key format that the nested elements should use, if propagationMethod is set to PropagationMethod::Custom.

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`propagationMethod`

Type: \craft\enums\PropagationMethod
Default value: \craft\enums\PropagationMethod::All

The propagation method that the nested elements should use.

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`translationDescription`

Type: string, null
Default value: null
Access: Read-only

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`valueGetter`

Type: Closure, null
Default value: null

Closure that will get the value.

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`valueSetter`

Type: Closure, null, false
Default value: null

Closure that will update the value.

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Public Methods

Method	Description
__call()	Calls the named method which is not a class method.
__clone()	This method is called after the object is created by cloning an existing one.
__construct()	Constructor
__get()	Returns the value of a component property.
__isset()	Checks if a property is set, i.e. defined and not null.
__set()	Sets the value of a component property.
__unset()	Sets a component property to be null.
attachBehavior()	Attaches a behavior to this component.
attachBehaviors()	Attaches a list of behaviors to the component.
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.
deleteNestedElements()	Deletes nested elements alongside the given owner element.
detachBehavior()	Detaches a behavior from the component.
detachBehaviors()	Detaches all behaviors from the component.
ensureBehaviors()	Makes sure that the behaviors declared in behaviors() are attached to this component.
getBehavior()	Returns the named behavior object.
getBehaviors()	Returns all behaviors attached to this component.
getCardsHtml()	Returns the HTML for managing nested elements via cards.
getIndexHtml()	Returns the HTML for managing nested elements via an element index.
getIsTranslatable()	Returns whether the field or attribute should be shown as translatable in the UI, for the given owner element.
getSearchKeywords()	Returns the search keywords for nested elements of the given owner element.
getSupportedSiteIds()	Returns the site IDs that are supported by nested elements for the given owner element.
getTranslationDescription()	Returns the description of this field or attribute’s translation support, for the given owner element.
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 for this component.
init()	Initializes the object.
maintainNestedElements()	Maintains the nested elements after an owner element has been saved.
off()	Detaches an existing event handler from this component.
on()	Attaches an event handler to an event.
restoreNestedElements()	Restores nested elements which had been deleted alongside their owner.
trigger()	Triggers an event.

`__construct()`

Constructor

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Arguments

$elementType (class-string<\craft\base\NestedElementInterface>) – The nested element type.
$queryFactory (callable) – A factory method which returns a query for fetching nested elements
$config (array) – Name-value pairs that will be used to initialize the object properties.

`deleteNestedElements()`

Deletes nested elements alongside the given owner element.

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Arguments

$owner (craft\base\ElementInterface)
$hardDelete (boolean) – Whether the nested elements should be hard-deleted immediately, instead of soft-deleted.