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hasmany.php
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/
hasmany.php
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<?php
/**
* Fuel is a fast, lightweight, community driven PHP 5.4+ framework.
*
* @package Fuel
* @version 1.9-dev
* @author Fuel Development Team
* @license MIT License
* @copyright 2010 - 2019 Fuel Development Team
* @link https://fuelphp.com
*/
namespace Orm;
class HasMany extends Relation
{
public function __construct($from, $name, array $config)
{
if (call_user_func_array(array($from, 'property'), array($name)))
{
throw new \FuelException(sprintf('"%s" is defined as both a property and a has-many relation in model %s', $name, $from));
}
$this->name = $name;
$this->model_from = $from;
$this->model_to = array_key_exists('model_to', $config)
? $config['model_to'] : \Inflector::get_namespace($from).'Model_'.\Inflector::classify($name);
$this->key_from = array_key_exists('key_from', $config)
? (array) $config['key_from'] : $this->key_from;
$this->key_to = array_key_exists('key_to', $config)
? (array) $config['key_to'] : (array) \Inflector::foreign_key($this->model_from);
$this->conditions = array_key_exists('conditions', $config)
? (array) $config['conditions'] : array();
$this->cascade_save = array_key_exists('cascade_save', $config)
? $config['cascade_save'] : $this->cascade_save;
$this->cascade_delete = array_key_exists('cascade_delete', $config)
? $config['cascade_delete'] : $this->cascade_delete;
if ( ! class_exists($this->model_to))
{
throw new \FuelException('Related model not found by Has_Many relation "'.$this->name.'": '.$this->model_to);
}
$this->model_to = get_real_class($this->model_to);
}
public function get(Model $from, array $conditions = array())
{
$query = call_user_func(array($this->model_to, 'query'));
reset($this->key_to);
foreach ($this->key_from as $key)
{
// no point running a query when a key value is null
if ($from->{$key} === null)
{
return array();
}
$query->where(current($this->key_to), $from->{$key});
next($this->key_to);
}
$conditions = \Arr::merge($this->conditions, $conditions);
$query->_parse_where_array(\Arr::get($conditions, 'where', array()));
foreach (\Arr::get($conditions, 'order_by', array()) as $field => $direction)
{
if (is_numeric($field))
{
$query->order_by($direction);
}
else
{
$query->order_by($field, $direction);
}
}
return $query->get();
}
public function join($alias_from, $rel_name, $alias_to_nr, $conditions = array())
{
$alias_to = 't'.$alias_to_nr;
$model = array(
'model' => $this->model_to,
'connection' => call_user_func(array($this->model_to, 'connection')),
'table' => array(call_user_func(array($this->model_to, 'table')), $alias_to),
'primary_key' => call_user_func(array($this->model_to, 'primary_key')),
'join_type' => \Arr::get($conditions, 'join_type') ?: \Arr::get($this->conditions, 'join_type', 'left'),
'join_on' => array(),
'columns' => $this->select($alias_to),
'rel_name' => strpos($rel_name, '.') ? substr($rel_name, strrpos($rel_name, '.') + 1) : $rel_name,
'relation' => $this,
'where' => \Arr::get($conditions, 'where', array()),
'order_by' => \Arr::get($conditions, 'order_by') ?: \Arr::get($this->conditions, 'order_by', array()),
);
reset($this->key_to);
foreach ($this->key_from as $key)
{
$model['join_on'][] = array($alias_from.'.'.$key, '=', $alias_to.'.'.current($this->key_to));
next($this->key_to);
}
foreach (array(\Arr::get($this->conditions, 'where', array()), \Arr::get($conditions, 'join_on', array())) as $c)
{
foreach ($c as $key => $condition)
{
! is_array($condition) and $condition = array($key, '=', $condition);
if ( ! $condition[0] instanceof \Fuel\Core\Database_Expression and strpos($condition[0], '.') === false)
{
$condition[0] = $alias_to.'.'.$condition[0];
}
if (count($condition) == 2) // From Query::_where()
{
$condition = array($condition[0], '=', $condition[1]);
}
is_string($condition[2]) and $condition[2] = \Db::quote($condition[2], $model['connection']);
$model['join_on'][] = $condition;
}
}
return array($rel_name => $model);
}
public function save($model_from, $models_to, $original_model_ids, $parent_saved, $cascade)
{
if ( ! $parent_saved)
{
return;
}
if ( ! is_array($models_to) and ($models_to = is_null($models_to) ? array() : $models_to) !== array())
{
throw new \FuelException('Assigned relationships must be an array or null, given relationship value for '.
$this->name.' is invalid.');
}
$original_model_ids === null and $original_model_ids = array();
foreach ($models_to as $key => $model_to)
{
if ( ! $model_to instanceof $this->model_to)
{
throw new \FuelException('Invalid Model instance added to relations in this model.');
}
$current_model_id = ($model_to and ! $model_to->is_new()) ? $model_to->implode_pk($model_to) : null;
// Check if the model was already assigned
if (($model_to and $model_to->is_new()) or ! in_array($current_model_id, $original_model_ids))
{
// assign this object to the new objects foreign keys
reset($this->key_to);
$frozen = $model_to->frozen(); // only unfreeze/refreeze when it was frozen
$frozen and $model_to->unfreeze();
foreach ($this->key_from as $pk)
{
$model_to->{current($this->key_to)} = $model_from->{$pk};
next($this->key_to);
}
$model_to->is_new() and $model_to->save(false);
$frozen and $model_to->freeze();
}
// check if the model_to's foreign_keys match the model_from's primary keys
else
{
// unset current model from from array
unset($original_model_ids[array_search($current_model_id, $original_model_ids)]);
// check if model_to still refers to this model_from
$changed = false;
reset($this->key_to);
foreach ($this->key_from as $pk)
{
if ($model_to->{current($this->key_to)} != $model_from->{$pk})
{
$changed = true;
}
next($this->key_to);
}
// if any of the keys changed, the relationship was broken - remove model_to from loaded objects
if ($changed)
{
$model_from->unfreeze();
$rel = $model_from->_relate();
unset($rel[$this->name][$key]);
$model_from->_relate($rel);
$model_from->freeze();
// cascading this change won't work here, save just the object with cascading switched off
$model_from->save(false);
}
}
// Fix it if key isn't an imploded PK
if ($key != ($current_model_id = $model_to->implode_pk($model_to)))
{
$model_from->unfreeze();
$rel = $model_from->_relate();
if ( ! empty($rel[$this->name][$key]) and $rel[$this->name][$key] === $model_to)
{
unset($rel[$this->name][$key]);
}
$rel[$this->name][$current_model_id] = $model_to;
$model_from->_relate($rel);
$model_from->freeze();
}
}
// if any original ids are left over in the array, they're no longer related - break them
foreach ($original_model_ids as $original_model_id)
{
// if still loaded set this object's old relation's foreign keys to null
if ($original_model_id and $obj = call_user_func(array($this->model_to, 'find'),
count($this->key_to) == 1 ? array($original_model_id) : explode('][', substr($original_model_id, 1, -1))))
{
$frozen = $obj->frozen(); // only unfreeze/refreeze when it was frozen
$frozen and $obj->unfreeze();
foreach ($this->key_to as $fk)
{
$obj->{$fk} = null;
}
$frozen and $obj->freeze();
// cascading this change won't work here, save just the object with cascading switched off
$obj->save(false);
}
}
$cascade = is_null($cascade) ? $this->cascade_save : (bool) $cascade;
if ($cascade and ! empty($models_to))
{
foreach ($models_to as $m)
{
$m->save();
}
}
}
public function delete($model_from, $parent_deleted, $cascade)
{
if ( ! $parent_deleted)
{
return;
}
// break current relations, may be incomplete
$model_from->unfreeze();
$rels = $model_from->_relate();
unset($rels[$this->name]);
$model_from->_relate($rels);
$model_from->freeze();
// fetch all related records
$model_from->get($this->name);
// check if we need to cascate the delete
$cascade = is_null($cascade) ? $this->cascade_delete : (bool) $cascade;
if ($cascade)
{
// delete the reclated records
foreach ($model_from->{$this->name} as $m)
{
$m->delete();
}
}
else
{
// no, reset the foreign key and decouple
foreach ($model_from->{$this->name} as $m)
{
if ( ! $m->frozen())
{
foreach ($this->key_to as $fk)
{
$m->{$fk} = null;
}
$m->is_changed() and $m->save();
}
}
}
}
}