Class ExistsIn
Checks that the value provided in a field exists as the primary key of another table.
Property Summary
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$_fields protected
arrayThe list of fields to check
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$_options protected
arrayOptions for the constructor
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$_repository protected
Cake\ORM\Table|Cake\ORM\Association|stringThe repository where the field will be looked for
Method Summary
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__construct() public
Constructor.
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__invoke() public
Performs the existence check
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_fieldsAreNull() protected
Checks whether or not the given entity fields are nullable and null.
Method Detail
__construct() ¶ public
__construct(string|array $fields, Cake\ORM\Table|Cake\ORM\Association|string $repository, array $options = [])Constructor.
Available option for $options is 'allowNullableNulls' flag. Set to true to accept composite foreign keys where one or more nullable columns are null.
Parameters
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string|array$fields The field or fields to check existence as primary key.
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Cake\ORM\Table|Cake\ORM\Association|string$repository The repository where the field will be looked for, or the association name for the repository.
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array$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 toNOT NULL.
__invoke() ¶ public
__invoke(Cake\Datasource\EntityInterface $entity, array $options): boolPerforms the existence check
Parameters
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Cake\Datasource\EntityInterface$entity The entity from where to extract the fields
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array$options Options passed to the check, where the
repositorykey is required.
Returns
boolThrows
RuntimeExceptionWhen the rule refers to an undefined association.
_fieldsAreNull() ¶ protected
_fieldsAreNull(Cake\Datasource\EntityInterface $entity, Cake\ORM\Table $source): boolChecks whether or not the given entity fields are nullable and null.
Parameters
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Cake\Datasource\EntityInterface$entity The entity to check.
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Cake\ORM\Table$source The table to use schema from.
Returns
bool