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242 lines
7.2 KiB
242 lines
7.2 KiB
<?php
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/**
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* Fuel
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*
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* Fuel is a fast, lightweight, community driven PHP5 framework.
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*
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* @package Fuel
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* @version 1.8
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* @author Fuel Development Team
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* @license MIT License
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* @copyright 2010 - 2016 Fuel Development Team
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* @link http://fuelphp.com
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*/
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namespace Orm;
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class HasOne extends Relation
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{
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protected $singular = true;
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public function __construct($from, $name, array $config)
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{
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$this->name = $name;
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$this->model_from = $from;
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$this->model_to = array_key_exists('model_to', $config)
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? $config['model_to'] : \Inflector::get_namespace($from).'Model_'.\Inflector::classify($name);
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$this->key_from = array_key_exists('key_from', $config)
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? (array) $config['key_from'] : $this->key_from;
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$this->key_to = array_key_exists('key_to', $config)
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? (array) $config['key_to'] : (array) \Inflector::foreign_key($this->model_from);
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$this->conditions = array_key_exists('conditions', $config)
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? (array) $config['conditions'] : array();
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$this->cascade_save = array_key_exists('cascade_save', $config)
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? $config['cascade_save'] : $this->cascade_save;
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$this->cascade_delete = array_key_exists('cascade_delete', $config)
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? $config['cascade_delete'] : $this->cascade_delete;
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if ( ! class_exists($this->model_to))
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{
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throw new \FuelException('Related model not found by Has_One relation "'.$this->name.'": '.$this->model_to);
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}
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$this->model_to = get_real_class($this->model_to);
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}
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public function get(Model $from, array $conditions = array())
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{
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$query = call_user_func(array($this->model_to, 'query'));
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reset($this->key_to);
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foreach ($this->key_from as $key)
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{
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// no point running a query when a key value is null
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if ($from->{$key} === null)
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{
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return null;
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}
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$query->where(current($this->key_to), $from->{$key});
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next($this->key_to);
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}
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$conditions = \Arr::merge($this->conditions, $conditions);
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foreach (\Arr::get($conditions, 'where', array()) as $key => $condition)
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{
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is_array($condition) or $condition = array($key, '=', $condition);
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$query->where($condition);
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}
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return $query->get_one();
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}
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public function join($alias_from, $rel_name, $alias_to_nr, $conditions = array())
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{
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$alias_to = 't'.$alias_to_nr;
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$model = array(
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'model' => $this->model_to,
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'connection' => call_user_func(array($this->model_to, 'connection')),
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'table' => array(call_user_func(array($this->model_to, 'table')), $alias_to),
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'primary_key' => call_user_func(array($this->model_to, 'primary_key')),
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'join_type' => \Arr::get($conditions, 'join_type') ?: \Arr::get($this->conditions, 'join_type', 'left'),
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'join_on' => array(),
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'columns' => $this->select($alias_to),
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'rel_name' => strpos($rel_name, '.') ? substr($rel_name, strrpos($rel_name, '.') + 1) : $rel_name,
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'relation' => $this,
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'where' => \Arr::get($conditions, 'where', array()),
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'order_by' => \Arr::get($conditions, 'order_by') ?: \Arr::get($this->conditions, 'order_by', array()),
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);
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reset($this->key_to);
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foreach ($this->key_from as $key)
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{
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$model['join_on'][] = array($alias_from.'.'.$key, '=', $alias_to.'.'.current($this->key_to));
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next($this->key_to);
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}
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foreach (array(\Arr::get($this->conditions, 'where', array()), \Arr::get($conditions, 'join_on', array())) as $c)
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{
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foreach ($c as $key => $condition)
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{
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! is_array($condition) and $condition = array($key, '=', $condition);
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if ( ! $condition[0] instanceof \Fuel\Core\Database_Expression and strpos($condition[0], '.') === false)
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{
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$condition[0] = $alias_to.'.'.$condition[0];
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}
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is_string($condition[2]) and $condition[2] = \Db::quote($condition[2], $model['connection']);
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$model['join_on'][] = $condition;
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}
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}
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return array($rel_name => $model);
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}
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public function save($model_from, $model_to, $original_model_id, $parent_saved, $cascade)
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{
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if ( ! $parent_saved)
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{
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return;
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}
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if ( ! $model_to instanceof $this->model_to and $model_to !== null)
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{
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throw new \FuelException('Invalid Model instance added to relations in this model.');
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}
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$current_model_id = ($model_to and ! $model_to->is_new()) ? $model_to->implode_pk($model_to) : null;
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// Check if there was another model assigned (this supersedes any change to the foreign key(s))
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if (($model_to and $model_to->is_new()) or $current_model_id != $original_model_id)
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{
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// assign this object to the new objects foreign keys
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if ( ! empty($model_to))
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{
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reset($this->key_to);
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$frozen = $model_to->frozen(); // only unfreeze/refreeze when it was frozen
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$frozen and $model_to->unfreeze();
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foreach ($this->key_from as $pk)
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{
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$model_to->{current($this->key_to)} = $model_from->{$pk};
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next($this->key_to);
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}
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$frozen and $model_to->freeze();
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}
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// if still loaded set this object's old relation's foreign keys to null
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if ($original_model_id and $obj = call_user_func(array($this->model_to, 'find'),
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count($this->key_to) == 1 ? array($original_model_id) : explode('][', substr($original_model_id, 1, -1))))
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{
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// check whether the object still refers to this model_from
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$changed = false;
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reset($this->key_to);
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foreach ($this->key_from as $pk)
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{
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if ($obj->{current($this->key_to)} != $model_from->{$pk})
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{
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$changed = true;
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}
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next($this->key_to);
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}
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// when it still refers to this object, reset the foreign key(s)
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if ( ! $changed)
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{
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$frozen = $obj->frozen(); // only unfreeze/refreeze when it was frozen
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$frozen and $obj->unfreeze();
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foreach ($this->key_to as $fk)
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{
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$obj->{$fk} = null;
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}
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$frozen and $obj->freeze();
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// cascading this change won't work here, save just the object with cascading switched off
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$obj->save(false);
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}
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}
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}
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// if not empty check the model_to's foreign_keys, when empty nothing changed
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elseif ( ! empty($model_to))
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{
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// check if model_to still refers to this model_from
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$changed = false;
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reset($this->key_to);
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foreach ($this->key_from as $pk)
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{
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if ($model_to->{current($this->key_to)} != $model_from->{$pk})
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{
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$changed = true;
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}
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next($this->key_to);
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}
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// if any of the keys changed, the relationship was broken - remove model_to from loaded objects
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if ($changed)
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{
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// Remove the model_to from the relationships of model_from
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$model_from->unfreeze();
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$rel = $model_from->_relate();
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$rel[$this->name] = null;
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$model_from->_relate($rel);
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$model_from->freeze();
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}
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}
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$cascade = is_null($cascade) ? $this->cascade_save : (bool) $cascade;
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if ($cascade and ! empty($model_to))
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{
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$model_to->save();
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}
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}
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public function delete($model_from, $model_to, $parent_deleted, $cascade)
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{
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if ( ! $parent_deleted)
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{
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return;
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}
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// break current relations
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$model_from->unfreeze();
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$rels = $model_from->_relate();
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$rels[$this->name] = null;
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$model_from->_relate($rels);
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$model_from->freeze();
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if ( ! empty($model_to))
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{
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$cascade = is_null($cascade) ? $this->cascade_delete : (bool) $cascade;
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if ($cascade)
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{
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$model_to->delete();
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}
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elseif ( ! $model_to->frozen())
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{
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foreach ($this->key_to as $fk)
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{
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$model_to->{$fk} = null;
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}
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$model_to->is_changed() and $model_to->save();
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}
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}
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}
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}
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