Class EntityContext

Provides a form context around a single entity and its relations. It also can be used as context around an array or iterator of entities.

This class lets FormHelper interface with entities or collections of entities.

Important Keys:

  • entity The entity this context is operating on.
  • table Either the ORM\Table instance to fetch schema/validators from, an array of table instances in the case of a form spanning multiple entities, or the name(s) of the table. If this is null the table name(s) will be determined using naming conventions.
  • validator Either the Validation\Validator to use, or the name of the validation method to call on the table object. For example 'default'. Defaults to 'default'. Can be an array of table alias=>validators when dealing with associated forms.
Cake\View\Form\EntityContext implements Cake\View\Form\ContextInterface
Namespace: Cake\View\Form
Location: View/Form/EntityContext.php

Properties summary

Method Summary

  • __construct() public
    Constructor.
  • _extractMultiple() protected

    Helper method used to extract all the primary key values out of an array, The primary key column is guessed out of the provided $path array

  • _getProp() protected
    Read property values or traverse arrays/iterators.
  • _getTable() protected
    Get the table instance from a property path
  • _getValidator() protected

    Get the validator associated to an entity based on naming conventions.

  • _prepare() protected
    Prepare some additional data from the context.
  • _schemaDefault() protected
    Get default value from table schema for given entity field.
  • attributes() public
    Get an associative array of other attributes for a field name.
  • entity() public
    Fetch the leaf entity for the given path.
  • error() public
    Get the errors for a given field
  • fieldNames() public
    Get the field names from the top level entity.
  • hasError() public
    Check whether or not a field has an error attached to it
  • isCreate() public
    Check whether or not this form is a create or update.
  • Returns true if the passed field name is part of the primary key for this context
  • isRequired() public
    Check if a field should be marked as required.
  • primaryKey() public
    Get the primary key data for the context.
  • type() public
    Get the abstract field type for a given field name.
  • val() public
    Get the value for a given path.

Method Detail

__construct()source public 

__construct( Cake\Http\ServerRequest $request , array $context )

Constructor.

Parameters

Cake\Http\ServerRequest $request
The request object.
array $context
Context info.

_extractMultiple()source protected 

_extractMultiple( array|Traversable $values , array $path )

Helper method used to extract all the primary key values out of an array, The primary key column is guessed out of the provided $path array

Parameters

array|Traversable $values
The list from which to extract primary keys from
array $path
Each one of the parts in a path for a field name

Returns

array|null

_getProp()source protected 

_getProp( mixed $target , string $field )

Read property values or traverse arrays/iterators.

Parameters

mixed $target
The entity/array/collection to fetch $field from.
string $field
The next field to fetch.

Returns

mixed

_getTable()source protected 

_getTable( array $parts , boolean $fallback true )

Get the table instance from a property path

Parameters

array $parts
Each one of the parts in a path for a field name
boolean $fallback optional true

Whether or not to fallback to the last found table when a non-existent field/property is being encountered.

Returns

Cake\ORM\Table|boolean
Table instance or false

_getValidator()source protected 

_getValidator( array $parts )

Get the validator associated to an entity based on naming conventions.

Parameters

array $parts
Each one of the parts in a path for a field name

Returns

Cake\Validation\Validator

_prepare()source protected 

_prepare( )

Prepare some additional data from the context.

If the table option was provided to the constructor and it was a string, ORM\TableRegistry will be used to get the correct table instance.

If an object is provided as the table option, it will be used as is.

If no table option is provided, the table name will be derived based on naming conventions. This inference will work with a number of common objects like arrays, Collection objects and ResultSets.

Throws

RuntimeException
When a table object cannot be located/inferred.

_schemaDefault()source protected 

_schemaDefault( string $field , Cake\Datasource\EntityInterface $entity )

Get default value from table schema for given entity field.

Parameters

string $field
Field name.
Cake\Datasource\EntityInterface $entity
The entity.

Returns

mixed

attributes()source public 

attributes( string $field )

Get an associative array of other attributes for a field name.

Parameters

string $field
A dot separated path to get additional data on.

Returns

array
An array of data describing the additional attributes on a field.

Implementation of

Cake\View\Form\ContextInterface::attributes()

entity()source public 

entity( array|null $path null )

Fetch the leaf entity for the given path.

This method will traverse the given path and find the leaf entity. If the path does not contain a leaf entity false will be returned.

Parameters

array|null $path optional null

Each one of the parts in a path for a field name or null to get the entity passed in constructor context.

Returns

Cake\Datasource\EntityInterface|Traversable|array|boolean

Throws

RuntimeException
When properties cannot be read.

error()source public 

error( string $field )

Get the errors for a given field

Parameters

string $field
A dot separated path to check errors on.

Returns

array
An array of errors.

Implementation of

Cake\View\Form\ContextInterface::error()

fieldNames()source public 

fieldNames( )

Get the field names from the top level entity.

If the context is for an array of entities, the 0th index will be used.

Returns

array
Array of fieldnames in the table/entity.

Implementation of

Cake\View\Form\ContextInterface::fieldNames()

hasError()source public 

hasError( string $field )

Check whether or not a field has an error attached to it

Parameters

string $field
A dot separated path to check errors on.

Returns

boolean
Returns true if the errors for the field are not empty.

Implementation of

Cake\View\Form\ContextInterface::hasError()

isCreate()source public 

isCreate( )

Check whether or not this form is a create or update.

If the context is for a single entity, the entity's isNew() method will be used. If isNew() returns null, a create operation will be assumed.

If the context is for a collection or array the first object in the collection will be used.

Returns

boolean

Implementation of

Cake\View\Form\ContextInterface::isCreate()

isPrimaryKey()source public 

isPrimaryKey( string $field )

Returns true if the passed field name is part of the primary key for this context

Parameters

string $field

A dot separated path to the field a value is needed for.

Returns

boolean

Implementation of

Cake\View\Form\ContextInterface::isPrimaryKey()

isRequired()source public 

isRequired( string $field )

Check if a field should be marked as required.

Parameters

string $field
The dot separated path to the field you want to check.

Returns

boolean

Implementation of

Cake\View\Form\ContextInterface::isRequired()

primaryKey()source public 

primaryKey( )

Get the primary key data for the context.

Gets the primary key columns from the root entity's schema.

Returns

array

Implementation of

Cake\View\Form\ContextInterface::primaryKey()

type()source public 

type( string $field )

Get the abstract field type for a given field name.

Parameters

string $field
A dot separated path to get a schema type for.

Returns

null|string
An abstract data type or null.

See

Cake\Database\Type

Implementation of

Cake\View\Form\ContextInterface::type()

val()source public 

val( string $field , array $options [] )

Get the value for a given path.

Traverses the entity data and finds the value for $path.

Parameters

string $field
The dot separated path to the value.
array $options optional []

Options: - default: Default value to return if no value found in request data or entity. - schemaDefault: Boolean indicating whether default value from table schema should be used if it's not explicitly provided.

Returns

mixed
The value of the field or null on a miss.

Implementation of

Cake\View\Form\ContextInterface::val()

Properties detail

$_contextsource

protected array

Context data for this object.

$_isCollectionsource

protected boolean

Boolean to track whether or not the entity is a collection.

false

$_requestsource

protected Cake\Http\ServerRequest

The request object.

$_rootNamesource

protected string

The name of the top level entity/table object.

$_tablessource

protected array

A dictionary of tables

[]

$_validatorsource

protected Cake\Validation\Validator[]

Dictionary of validators.

[]

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https://api.cakephp.org/3.4/class-Cake.View.Form.EntityContext.html