pictcode / lib / Cake / Model / Behavior / ContainableBehavior.php @ 0b1b8047
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<?php
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/**
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* Behavior for binding management.
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*
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* Behavior to simplify manipulating a model's bindings when doing a find operation
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package Cake.Model.Behavior
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* @since CakePHP(tm) v 1.2.0.5669
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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App::uses('ModelBehavior', 'Model'); |
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/**
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* Behavior to allow for dynamic and atomic manipulation of a Model's associations
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* used for a find call. Most useful for limiting the amount of associations and
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* data returned.
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*
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* @package Cake.Model.Behavior
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* @link http://book.cakephp.org/2.0/en/core-libraries/behaviors/containable.html
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*/
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class ContainableBehavior extends ModelBehavior { |
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/**
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* Types of relationships available for models
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*
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* @var array
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*/
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public $types = array('belongsTo', 'hasOne', 'hasMany', 'hasAndBelongsToMany'); |
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/**
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* Runtime configuration for this behavior
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*
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* @var array
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*/
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public $runtime = array(); |
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/**
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* Initiate behavior for the model using specified settings.
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*
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* Available settings:
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*
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* - recursive: (boolean, optional) set to true to allow containable to automatically
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* determine the recursiveness level needed to fetch specified models,
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* and set the model recursiveness to this level. setting it to false
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* disables this feature. DEFAULTS TO: true
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* - notices: (boolean, optional) issues E_NOTICES for bindings referenced in a
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* containable call that are not valid. DEFAULTS TO: true
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* - autoFields: (boolean, optional) auto-add needed fields to fetch requested
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* bindings. DEFAULTS TO: true
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*
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* @param Model $Model Model using the behavior
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* @param array $settings Settings to override for model.
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* @return void
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*/
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public function setup(Model $Model, $settings = array()) { |
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if (!isset($this->settings[$Model->alias])) { |
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$this->settings[$Model->alias] = array('recursive' => true, 'notices' => true, 'autoFields' => true); |
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} |
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$this->settings[$Model->alias] = array_merge($this->settings[$Model->alias], $settings); |
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} |
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/**
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* Runs before a find() operation. Used to allow 'contain' setting
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* as part of the find call, like this:
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*
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* `Model->find('all', array('contain' => array('Model1', 'Model2')));`
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*
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* ```
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* Model->find('all', array('contain' => array(
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* 'Model1' => array('Model11', 'Model12'),
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* 'Model2',
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* 'Model3' => array(
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* 'Model31' => 'Model311',
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* 'Model32',
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* 'Model33' => array('Model331', 'Model332')
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* )));
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* ```
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*
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* @param Model $Model Model using the behavior
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* @param array $query Query parameters as set by cake
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* @return array
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*/
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public function beforeFind(Model $Model, $query) { |
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$reset = (isset($query['reset']) ? $query['reset'] : true); |
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$noContain = false; |
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$contain = array(); |
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if (isset($this->runtime[$Model->alias]['contain'])) { |
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$noContain = empty($this->runtime[$Model->alias]['contain']); |
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$contain = $this->runtime[$Model->alias]['contain']; |
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unset($this->runtime[$Model->alias]['contain']); |
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} |
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if (isset($query['contain'])) { |
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$noContain = $noContain || empty($query['contain']); |
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if ($query['contain'] !== false) { |
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$contain = array_merge($contain, (array)$query['contain']); |
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} |
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} |
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$noContain = $noContain && empty($contain); |
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if ($noContain || empty($contain)) { |
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if ($noContain) { |
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$query['recursive'] = -1; |
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} |
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return $query; |
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} |
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if ((isset($contain[0]) && is_bool($contain[0])) || is_bool(end($contain))) { |
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$reset = is_bool(end($contain)) |
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? array_pop($contain) |
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: array_shift($contain); |
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} |
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$containments = $this->containments($Model, $contain); |
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$map = $this->containmentsMap($containments); |
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$mandatory = array(); |
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foreach ($containments['models'] as $model) { |
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$instance = $model['instance']; |
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$needed = $this->fieldDependencies($instance, $map, false); |
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if (!empty($needed)) { |
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$mandatory = array_merge($mandatory, $needed); |
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} |
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if ($contain) { |
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$backupBindings = array(); |
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foreach ($this->types as $relation) { |
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if (!empty($instance->__backAssociation[$relation])) { |
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$backupBindings[$relation] = $instance->__backAssociation[$relation]; |
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} else {
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$backupBindings[$relation] = $instance->{$relation}; |
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} |
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} |
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foreach ($this->types as $type) { |
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$unbind = array(); |
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foreach ($instance->{$type} as $assoc => $options) { |
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if (!isset($model['keep'][$assoc])) { |
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$unbind[] = $assoc; |
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} |
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} |
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if (!empty($unbind)) { |
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if (!$reset && empty($instance->__backOriginalAssociation)) { |
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$instance->__backOriginalAssociation = $backupBindings; |
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} |
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$instance->unbindModel(array($type => $unbind), $reset); |
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} |
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foreach ($instance->{$type} as $assoc => $options) { |
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if (isset($model['keep'][$assoc]) && !empty($model['keep'][$assoc])) { |
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if (isset($model['keep'][$assoc]['fields'])) { |
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$model['keep'][$assoc]['fields'] = $this->fieldDependencies($containments['models'][$assoc]['instance'], $map, $model['keep'][$assoc]['fields']); |
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} |
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if (!$reset && empty($instance->__backOriginalAssociation)) { |
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$instance->__backOriginalAssociation = $backupBindings; |
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} elseif ($reset) { |
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$instance->__backAssociation[$type] = $backupBindings[$type]; |
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} |
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$instance->{$type}[$assoc] = array_merge($instance->{$type}[$assoc], $model['keep'][$assoc]); |
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} |
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if (!$reset) { |
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$instance->__backInnerAssociation[] = $assoc; |
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} |
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} |
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} |
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} |
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} |
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if ($this->settings[$Model->alias]['recursive']) { |
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$query['recursive'] = (isset($query['recursive'])) ? max($query['recursive'], $containments['depth']) : $containments['depth']; |
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} |
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$autoFields = ($this->settings[$Model->alias]['autoFields'] |
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&& !in_array($Model->findQueryType, array('list', 'count')) |
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&& !empty($query['fields'])); |
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if (!$autoFields) { |
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return $query; |
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} |
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$query['fields'] = (array)$query['fields']; |
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foreach (array('hasOne', 'belongsTo') as $type) { |
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if (!empty($Model->{$type})) { |
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foreach ($Model->{$type} as $assoc => $data) { |
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if ($Model->useDbConfig === $Model->{$assoc}->useDbConfig && !empty($data['fields'])) { |
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foreach ((array)$data['fields'] as $field) { |
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$query['fields'][] = (strpos($field, '.') === false ? $assoc . '.' : '') . $field; |
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} |
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} |
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} |
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} |
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} |
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if (!empty($mandatory[$Model->alias])) { |
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foreach ($mandatory[$Model->alias] as $field) { |
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if ($field === '--primaryKey--') { |
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$field = $Model->primaryKey; |
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} elseif (preg_match('/^.+\.\-\-[^-]+\-\-$/', $field)) { |
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list($modelName, $field) = explode('.', $field); |
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if ($Model->useDbConfig === $Model->{$modelName}->useDbConfig) { |
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$field = $modelName . '.' . ( |
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($field === '--primaryKey--') ? $Model->$modelName->primaryKey : $field |
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); |
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} else {
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$field = null; |
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} |
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} |
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if ($field !== null) { |
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$query['fields'][] = $field; |
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} |
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} |
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} |
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$query['fields'] = array_unique($query['fields']); |
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return $query; |
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} |
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/**
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* Unbinds all relations from a model except the specified ones. Calling this function without
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* parameters unbinds all related models.
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*
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* @param Model $Model Model on which binding restriction is being applied
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* @return void
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* @link http://book.cakephp.org/2.0/en/core-libraries/behaviors/containable.html#using-containable
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*/
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public function contain(Model $Model) { |
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$args = func_get_args(); |
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$contain = call_user_func_array('am', array_slice($args, 1)); |
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$this->runtime[$Model->alias]['contain'] = $contain; |
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} |
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/**
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* Permanently restore the original binding settings of given model, useful
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* for restoring the bindings after using 'reset' => false as part of the
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* contain call.
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*
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* @param Model $Model Model on which to reset bindings
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* @return void
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*/
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public function resetBindings(Model $Model) { |
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if (!empty($Model->__backOriginalAssociation)) { |
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$Model->__backAssociation = $Model->__backOriginalAssociation; |
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unset($Model->__backOriginalAssociation); |
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} |
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$Model->resetAssociations();
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if (!empty($Model->__backInnerAssociation)) { |
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$assocs = $Model->__backInnerAssociation; |
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$Model->__backInnerAssociation = array(); |
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foreach ($assocs as $currentModel) { |
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$this->resetBindings($Model->$currentModel); |
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} |
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} |
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} |
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/**
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* Process containments for model.
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*
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* @param Model $Model Model on which binding restriction is being applied
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* @param array $contain Parameters to use for restricting this model
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* @param array $containments Current set of containments
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* @param bool $throwErrors Whether non-existent bindings show throw errors
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* @return array Containments
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*/
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public function containments(Model $Model, $contain, $containments = array(), $throwErrors = null) { |
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$options = array('className', 'joinTable', 'with', 'foreignKey', 'associationForeignKey', 'conditions', 'fields', 'order', 'limit', 'offset', 'unique', 'finderQuery'); |
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$keep = array(); |
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if ($throwErrors === null) { |
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$throwErrors = (empty($this->settings[$Model->alias]) ? true : $this->settings[$Model->alias]['notices']); |
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} |
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foreach ((array)$contain as $name => $children) { |
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if (is_numeric($name)) { |
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$name = $children; |
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$children = array(); |
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} |
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if (preg_match('/(?<!\.)\(/', $name)) { |
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$name = str_replace('(', '.(', $name); |
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} |
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if (strpos($name, '.') !== false) { |
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$chain = explode('.', $name); |
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$name = array_shift($chain); |
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$children = array(implode('.', $chain) => $children); |
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} |
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$children = (array)$children; |
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foreach ($children as $key => $val) { |
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if (is_string($key) && is_string($val) && !in_array($key, $options, true)) { |
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$children[$key] = (array)$val; |
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} |
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} |
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$keys = array_keys($children); |
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if ($keys && isset($children[0])) { |
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$keys = array_merge(array_values($children), $keys); |
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} |
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foreach ($keys as $i => $key) { |
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if (is_array($key)) { |
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continue;
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} |
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$optionKey = in_array($key, $options, true); |
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if (!$optionKey && is_string($key) && preg_match('/^[a-z(]/', $key) && (!isset($Model->{$key}) || !is_object($Model->{$key}))) { |
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$option = 'fields'; |
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$val = array($key); |
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if ($key{0} === '(') { |
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$val = preg_split('/\s*,\s*/', substr($key, 1, -1)); |
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} elseif (preg_match('/ASC|DESC$/', $key)) { |
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$option = 'order'; |
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$val = $Model->{$name}->alias . '.' . $key; |
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} elseif (preg_match('/[ =!]/', $key)) { |
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$option = 'conditions'; |
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$val = $Model->{$name}->alias . '.' . $key; |
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} |
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$children[$option] = is_array($val) ? $val : array($val); |
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$newChildren = null; |
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if (!empty($name) && !empty($children[$key])) { |
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$newChildren = $children[$key]; |
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} |
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unset($children[$key], $children[$i]); |
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$key = $option; |
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$optionKey = true; |
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if (!empty($newChildren)) { |
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$children = Hash::merge($children, $newChildren); |
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} |
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} |
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if ($optionKey && isset($children[$key])) { |
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if (!empty($keep[$name][$key]) && is_array($keep[$name][$key])) { |
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$keep[$name][$key] = array_merge((isset($keep[$name][$key]) ? $keep[$name][$key] : array()), (array)$children[$key]); |
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} else {
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$keep[$name][$key] = $children[$key]; |
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} |
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unset($children[$key]); |
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} |
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} |
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if (!isset($Model->{$name}) || !is_object($Model->{$name})) { |
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if ($throwErrors) { |
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trigger_error(__d('cake_dev', 'Model "%s" is not associated with model "%s"', $Model->alias, $name), E_USER_WARNING); |
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} |
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continue;
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} |
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$containments = $this->containments($Model->{$name}, $children, $containments); |
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$depths[] = $containments['depth'] + 1; |
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if (!isset($keep[$name])) { |
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$keep[$name] = array(); |
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} |
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} |
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if (!isset($containments['models'][$Model->alias])) { |
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$containments['models'][$Model->alias] = array('keep' => array(), 'instance' => &$Model); |
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} |
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$containments['models'][$Model->alias]['keep'] = array_merge($containments['models'][$Model->alias]['keep'], $keep); |
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$containments['depth'] = empty($depths) ? 0 : max($depths); |
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return $containments; |
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} |
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/**
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* Calculate needed fields to fetch the required bindings for the given model.
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*
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* @param Model $Model Model
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* @param array $map Map of relations for given model
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* @param array|bool $fields If array, fields to initially load, if false use $Model as primary model
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* @return array Fields
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*/
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public function fieldDependencies(Model $Model, $map, $fields = array()) { |
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if ($fields === false) { |
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foreach ($map as $parent => $children) { |
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foreach ($children as $type => $bindings) { |
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foreach ($bindings as $dependency) { |
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if ($type === 'hasAndBelongsToMany') { |
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$fields[$parent][] = '--primaryKey--'; |
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} elseif ($type === 'belongsTo') { |
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$fields[$parent][] = $dependency . '.--primaryKey--'; |
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} |
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} |
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} |
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} |
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return $fields; |
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} |
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if (empty($map[$Model->alias])) { |
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return $fields; |
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} |
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foreach ($map[$Model->alias] as $type => $bindings) { |
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foreach ($bindings as $dependency) { |
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$innerFields = array(); |
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switch ($type) { |
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case 'belongsTo': |
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$fields[] = $Model->{$type}[$dependency]['foreignKey']; |
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break;
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case 'hasOne': |
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case 'hasMany': |
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$innerFields[] = $Model->$dependency->primaryKey; |
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$fields[] = $Model->primaryKey; |
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break;
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} |
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if (!empty($innerFields) && !empty($Model->{$type}[$dependency]['fields'])) { |
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$Model->{$type}[$dependency]['fields'] = array_unique(array_merge($Model->{$type}[$dependency]['fields'], $innerFields)); |
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} |
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} |
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} |
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return array_unique($fields); |
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} |
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/**
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* Build the map of containments
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*
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* @param array $containments Containments
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* @return array Built containments
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*/
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public function containmentsMap($containments) { |
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$map = array(); |
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foreach ($containments['models'] as $name => $model) { |
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$instance = $model['instance']; |
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foreach ($this->types as $type) { |
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foreach ($instance->{$type} as $assoc => $options) { |
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if (isset($model['keep'][$assoc])) { |
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$map[$name][$type] = isset($map[$name][$type]) ? array_merge($map[$name][$type], (array)$assoc) : (array)$assoc; |
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} |
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} |
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} |
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} |
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return $map; |
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} |
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} |