Class Relation

Many-to-many relationship for LeanObject

A relation consists of an array of objects, of which items can be added to, and removed from. Each field could only have one kind of object.

Namespace: LeanCloud
Located at LeanCloud/Relation.php

Methods summary
`public`	# `__construct( LeanCloud\LeanObject $parent, string $key, string $className = null )` Initialize relation Initialize relation Build a relation on parent field. It shall be rarely used directly, use `$parent->getRelation($key)` instead. Parameters `$parent` Parent object `$key` Field key on parent object `$className` ClassName the object relatedTo
`public array`	# `encode( )` Encode to JSON representation of relation. Encode to JSON representation of relation. Returns array
`public`	# `setParentAndKey( LeanCloud\LeanObject $parent, string $key )` Attempt to set and validate parent of relation Attempt to set and validate parent of relation Parameters `$parent` Parent object of relation `$key` Field key Throws RuntimeException
`public string`	# `getTargetClassName( )` Get target className of relation Get target className of relation Returns string
`public`	# `add( object\|array $objects )` Add object(s) to the field as relation Add object(s) to the field as relation Parameters `$objects` LeanObject(s) to add
`public`	# `remove( object\|array $objects )` Remove object(s) from the field Remove object(s) from the field Parameters `$objects` LeanObject(s) to remove
`public LeanCloud\Query`	# `getQuery( )` Query on the target class of relation Query on the target class of relation Returns `LeanCloud\Query`
`public LeanCloud\Query`	# `getReverseQuery( LeanCloud\LeanObject $child )` Query on the parent class where child is in the relation Query on the parent class where child is in the relation Parameters `$child` Child object Returns `LeanCloud\Query`