Class RulesChecker

existsIn()source public

existsIn( string|array $field , object|string $table , string|array|null $message null )

Returns a callable that can be used as a rule for checking that the values extracted from the entity to check exist as the primary key in another table.

This is useful for enforcing foreign key integrity checks.

Example:

$rules->add($rules->existsIn('author_id', 'Authors', 'Invalid Author'));

$rules->add($rules->existsIn('site_id', new SitesTable(), 'Invalid Site'));

Available $options are error 'message' and 'allowNullableNulls' flag. 'message' sets a custom error message. Set 'allowNullableNulls' to true to accept composite foreign keys where one or more nullable columns are null.

Parameters

string|array $field

The field or list of fields to check for existence by primary key lookup in the other table.

object|string $table

The table name where the fields existence will be checked.

string|array|null $message optional null

The error message to show in case the rule does not pass. Can also be an array of options. When an array, the 'message' key can be used to provide a message.

Returns

callable

isUnique()source public

isUnique( array $fields , string|array|null $message null )

Returns a callable that can be used as a rule for checking the uniqueness of a value in the table.

Example:

$rules->add($rules->isUnique(['email'], 'The email should be unique'));

Parameters

array $fields

The list of fields to check for uniqueness.

string|array|null $message optional null

The error message to show in case the rule does not pass. Can also be an array of options. When an array, the 'message' key can be used to provide a message.

Returns

callable

validCount()source public

validCount( string $field , integer $count 0 , string $operator '>' , string|null $message null )

Validates the count of associated records.

Parameters

string $field

The field to check the count on.

integer $count optional 0

The expected count.

string $operator optional '>'

The operator for the count comparison.

string|null $message optional null

The error message to show in case the rule does not pass.

Returns

callable

__construct()source public

__construct( array $options [] )

Constructor. Takes the options to be passed to all rules.

Parameters

array $options optional []

The options to pass to every rule

_addError()source protected

_addError( callable $rule , string $name , array $options )

Utility method for decorating any callable so that if it returns false, the correct property in the entity is marked as invalid.

Parameters

callable $rule

The rule to decorate

string $name

The alias for a rule.

array $options

The options containing the error message and field.

Returns

callable

_checkRules()source protected

_checkRules( Cake\Datasource\EntityInterface $entity , array $options [] , array $rules [] )

Used by top level functions checkDelete, checkCreate and checkUpdate, this function iterates an array containing the rules to be checked and checks them all.

Parameters

Cake\Datasource\EntityInterface $entity

The entity to check for validity.

array $options optional []

Extra options to pass to checker functions.

array $rules optional []

The list of rules that must be checked.

Returns

boolean

add()source public

add( callable $rule , string|null $name null , array $options [] )

Adds a rule that will be applied to the entity both on create and update operations.

Options

The options array accept the following special keys:

• errorField: The name of the entity field that will be marked as invalid if the rule does not pass.
• message: The error message to set to errorField if the rule does not pass.

Parameters

callable $rule

A callable function or object that will return whether the entity is valid or not.

string|null $name optional null

The alias for a rule.

array $options optional []

List of extra options to pass to the rule callable as second argument.

Returns

$this

addCreate()source public

addCreate( callable $rule , string|null $name null , array $options [] )

Adds a rule that will be applied to the entity on create operations.

Options

The options array accept the following special keys:

• errorField: The name of the entity field that will be marked as invalid if the rule does not pass.
• message: The error message to set to errorField if the rule does not pass.

Parameters

callable $rule

A callable function or object that will return whether the entity is valid or not.

string|null $name optional null

The alias for a rule.

array $options optional []

List of extra options to pass to the rule callable as second argument.

Returns

$this

addDelete()source public

addDelete( callable $rule , string|null $name null , array $options [] )

Adds a rule that will be applied to the entity on delete operations.

Options

The options array accept the following special keys:

• errorField: The name of the entity field that will be marked as invalid if the rule does not pass.
• message: The error message to set to errorField if the rule does not pass.

Parameters

callable $rule

A callable function or object that will return whether the entity is valid or not.

string|null $name optional null

The alias for a rule.

array $options optional []

List of extra options to pass to the rule callable as second argument.

Returns

$this

addUpdate()source public

addUpdate( callable $rule , string|null $name null , array $options [] )

Adds a rule that will be applied to the entity on update operations.

Options

The options array accept the following special keys:

• errorField: The name of the entity field that will be marked as invalid if the rule does not pass.
• message: The error message to set to errorField if the rule does not pass.

Parameters

callable $rule

A callable function or object that will return whether the entity is valid or not.

string|null $name optional null

The alias for a rule.

array $options optional []

List of extra options to pass to the rule callable as second argument.

Returns

$this

check()source public

check( Cake\Datasource\EntityInterface $entity , string $mode , array $options [] )

Runs each of the rules by passing the provided entity and returns true if all of them pass. The rules to be applied are depended on the $mode parameter which can only be RulesChecker::CREATE, RulesChecker::UPDATE or RulesChecker::DELETE

Parameters

Cake\Datasource\EntityInterface $entity

The entity to check for validity.

string $mode

Either 'create, 'update' or 'delete'.

array $options optional []

Extra options to pass to checker functions.

Returns

boolean

Throws

InvalidArgumentException
if an invalid mode is passed.

checkCreate()source public

checkCreate( Cake\Datasource\EntityInterface $entity , array $options [] )

Runs each of the rules by passing the provided entity and returns true if all of them pass. The rules selected will be only those specified to be run on 'create'

Parameters

Cake\Datasource\EntityInterface $entity

The entity to check for validity.

array $options optional []

Extra options to pass to checker functions.

Returns

boolean

checkDelete()source public

checkDelete( Cake\Datasource\EntityInterface $entity , array $options [] )

Runs each of the rules by passing the provided entity and returns true if all of them pass. The rules selected will be only those specified to be run on 'delete'

Parameters

Cake\Datasource\EntityInterface $entity

The entity to check for validity.

array $options optional []

Extra options to pass to checker functions.

Returns

boolean

checkUpdate()source public

checkUpdate( Cake\Datasource\EntityInterface $entity , array $options [] )

Runs each of the rules by passing the provided entity and returns true if all of them pass. The rules selected will be only those specified to be run on 'update'

Parameters

Cake\Datasource\EntityInterface $entity

The entity to check for validity.

array $options optional []

Extra options to pass to checker functions.

Returns

boolean