__construct()source public

__construct( string|array $fields , object|string $repository , array $options [] )

Constructor.

Available option for $options is 'allowNullableNulls' flag. Set to true to accept composite foreign keys where one or more nullable columns are null.

Parameters

string|array $fields

The field or fields to check existence as primary key.

object|string $repository

The repository where the field will be looked for, or the association name for the repository.

array $options optional []

The options that modify the rules behavior. Options 'allowNullableNulls' will make the rule pass if given foreign keys are set to null. Notice: allowNullableNulls cannot pass by database columns set to NOT NULL.

__invoke()source public

__invoke( Cake\Datasource\EntityInterface $entity , array $options )

Performs the existence check

Parameters

Cake\Datasource\EntityInterface $entity

The entity from where to extract the fields

array $options

Options passed to the check, where the repository key is required.

Returns

boolean

Throws

RuntimeException
When the rule refers to an undefined association.

_fieldsAreNull()source protected

_fieldsAreNull( Cake\Datasource\EntityInterface $entity , Cake\ORM\Table $source )

Checks whether or not the given entity fields are nullable and null.

Parameters

Cake\Datasource\EntityInterface $entity

The entity to check.

Cake\ORM\Table $source

The table to use schema from.

Returns

boolean

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