function init()
{
if ($this->_inited) {
return $this;
}
parent::init();
$p = $this->_init_config;
$this->source_key = !empty($p['source_key']) ? $p['source_key'] : reset($this->source_meta->idname);
$this->target_key = !empty($p['target_key']) ? $p['target_key'] : reset($this->source_meta->idname);
unset($this->_init_config);
return $this;
}
function init()
{
if ($this->_inited) {
return $this;
}
parent::init();
$p = $this->_init_config;
if (empty($p['mid_class'])) {
// 如果没有指定中间表对应的 ActiveRecord 类，则使用表数据入口直接处理中间表
$this->mid_meta = null;
if (empty($p['mid_table_name'])) {
// 尝试自动确定中间表名称
$t1 = $this->source_meta->table->name;
$t2 = $this->target_meta->table->name;
if ($t1 <= $t2) {
$mid_table_name = $t1 . '_has_' . $t2;
} else {
$mid_table_name = $t2 . '_has_' . $t1;
}
} else {
$mid_table_name = $p['mid_table_name'];
}
$this->mid_table = new QDB_Table(array('name' => $mid_table_name));
} else {
// 如果中间表作为实体，则由指定的 ActiveRecord 继承类负责处理中间表
$this->mid_meta = QDB_ActiveRecord_Meta::instance($p['mid_class']);
$this->mid_table = $this->mid_meta->table;
}
$this->source_key = !empty($p['source_key']) ? $p['source_key'] : reset($this->source_meta->idname);
$this->target_key = !empty($p['target_key']) ? $p['target_key'] : reset($this->target_meta->idname);
$this->mid_source_key = !empty($p['mid_source_key']) ? $p['mid_source_key'] : reset($this->source_meta->idname);
$this->mid_target_key = !empty($p['mid_target_key']) ? $p['mid_target_key'] : reset($this->target_meta->idname);
$this->mid_mapping_to = !empty($p['mid_mapping_to']) ? $p['mid_mapping_to'] : 'mid_data';
$class = $this->target_meta->class_name;
// $this->source_meta->addDynamicMethod("bind{$class}", array($this, 'bindTarget'));
// $this->source_meta->addDynamicMethod("unbind{$class}", array($this, 'unbindTarget'));
unset($this->_init_config);
return $this;
}
/**
* 添加一个对象关联
*
* $prop_name 参数指定使用 ActiveRecord 对象的什么属性来引用关联的对象。
* 例如“文章”对象的 comments 属性引用了多个关联的“评论”对象。
*
* $assoc_type 指定了关联的类型，可以是 QDB::BELONGS_TO、QDB::HAS_MANY、QDB::HAS_ONE 或 QDB::MANY_TO_MANY。
*
* $config 指定了关联的属性，可用的属性有多项。
*
* @param string $prop_name
* @param int $assoc_type
* @param array $config
*
* @return QDB_ActiveRecord_Meta
*/
function addAssoc($prop_name, $assoc_type, array $config)
{
switch ($assoc_type) {
case QDB::HAS_ONE:
case QDB::HAS_MANY:
if (empty($config['target_key'])) {
$config['target_key'] = strtolower($this->class_name) . '_id';
}
break;
case QDB::BELONGS_TO:
if (empty($config['source_key'])) {
$config['source_key'] = strtolower($config['assoc_class']) . '_id';
}
break;
case QDB::MANY_TO_MANY:
if (empty($config['mid_source_key'])) {
$config['mid_source_key'] = strtolower($this->class_name) . '_id';
}
if (empty($config['mid_target_key'])) {
$config['mid_target_key'] = strtolower($config['assoc_class']) . '_id';
}
}
$assoc = $config['assoc_params'];
$assoc['mapping_name'] = $prop_name;
$assoc['target_class'] = $config['assoc_class'];
unset($assoc[$assoc_type]);
$association = QDB_ActiveRecord_Association_Abstract::create($assoc_type, $assoc, $this);
$association->registerCallbacks($assoc);
$this->associations[$prop_name] = $association;
if ($association->type == QDB::BELONGS_TO) {
$association->init();
$this->belongsto_props[$association->source_key] = $association;
}
return $association;
}
