/**
* 根据组ID获取指定的offset和数量的数据
*
* 返回 false 表示不存在对应的组
*
* @param $group_id
* @param int $offset 起始位置
* @param int $limit 返回数量，0表示返回全部
* @return array 返回数组
*/
public static function get_data_by_group_id($group_id, $offset = 0, $limit = 0)
{
if (!isset(OOP_ORM_Result::$GROUP_DATA[$group_id]) && !isset(OOP_ORM_Result::$GROUP_RESOURCE[$group_id])) {
return array();
}
$max = OOP_ORM_Result::get_count_by_group_id($group_id);
if ($limit > 0) {
$max = min($max, $offset + $limit);
}
$rs = array();
for ($i = $offset; $i < $max; $i++) {
$rs[$i] = OOP_ORM_Result::get_offset_data_by_group_id($group_id, $i);
}
return $rs;
}
protected function __orm_callback_set_key_batch_orm_group(OOP_ORM_Result $result)
{
$this->_cached_key_batch_group_ids[] = $group_id = $result->id();
# 保存起来，待对象销毁时分组才销毁
OOP_ORM_Data::$KEY_BATCH_GROUPS[$group_id] = $result;
}
/**
* 用于给ORM回调初始化数据
*/
protected function __orm_callback_ini_result_(OOP_ORM_Result $result)
{
$this->_orm_result_uniqid = $result->get_uniqid();
}
/**
* 批量获取数据
*
* @param OOP_ORM $finder
* @param OOP_ORM_Data $obj
* @return null|OOP_ORM_Data
*/
protected function get_data_batch_type(OOP_ORM $finder, OOP_ORM_Data $obj, $type)
{
$config = $this->config();
$mapping = $config['mapping'];
$where = $config['where'];
$bind = isset($config['bind']) ? $config['bind'] : null;
$bind_field = $this->field_name;
$group = array();
if ($group_ids = $obj->__orm_callback('get_group_ids')) {
$obj_class = get_class($obj);
$next = true;
// 用来判断使得要跳出while循环
$offset = 0;
// 起始位置
$limit = 100;
// 单组批量获取数，这样可以避免某些组数量特别多时导致异常问题
while ($next) {
$found_count = 0;
foreach ($group_ids as $group_id) {
$tmp_group_data = OOP_ORM_Result::get_data_by_group_id($group_id, $offset, $limit);
$found_count += count($tmp_group_data);
foreach ($tmp_group_data as $item) {
if (get_class($item) !== $obj_class) {
# 不是相同类型的对象
continue;
}
if ($item === $obj) {
# 同一个对象
$next = false;
}
if ($item->__orm_callback('is_compiled', $this->key)) {
# 已经构造过的数据忽略
continue;
}
if ($found_count > $limit) {
$next = false;
}
$group[] = $item;
}
}
if (!$found_count) {
# 没有可用的返回数
break;
}
$offset += $limit;
}
}
if (!$group) {
# 没有获取到任何组，则采样单个获取的方法
OOP_ORM_DI_ORM::set_query_info($obj, $finder, $config);
return $finder->find()->current();
}
$batch_where = array();
foreach ($group as $item) {
/**
* @var $item OOP_ORM_Data
*/
foreach ($mapping as $k => $v) {
$batch_where[$k][] = $item->{$v};
}
foreach ($where as $k => $v) {
$batch_where[$k][] = $v;
}
if ($bind) {
$batch_where[$bind][] = $item->get_data_by_field_name($bind_field, true);
}
}
# 对数据进行去重处理
$batch_where = array_map('array_unique', $batch_where);
$return = null;
if (1 === count($batch_where)) {
# 只有1个条件
$c_key = key($batch_where);
//当前字段名
$in = current($batch_where);
//获取where条件
$rs = array();
$g = $finder->in($c_key, $in)->find();
$obj->__orm_callback('set_key_batch_orm_group', $g);
foreach ($g as $item) {
$k = $item->get_data_by_field_name($c_key, true);
$item->__orm_callback('add_parent_group_id', $group_ids);
$rs[$k][] = $item;
}
foreach ($group as $item) {
if ($mapping) {
$v = current($mapping);
$k = $item->{$v};
} elseif ($where) {
$k = current($where);
} elseif ($bind) {
$k = $item->get_data_by_field_name($bind_field, true);
} else {
$k = null;
}
if (!isset($rs[$k])) {
if ($type !== OOP_ORM::PARAM_TYPE_O2O) {
$current = array();
} else {
$current = null;
}
} else {
$current = $rs[$k];
if ($type === OOP_ORM::PARAM_TYPE_O2O) {
$current = current($current);
}
}
if ($item === $obj) {
$return = $current;
} else {
# 通过回调设置ORM批量获取的数据
$item->__orm_callback('set_batch_orm_data', $this->key, $current);
}
}
} else {
foreach ($batch_where as $k => $v) {
$finder->in($k, $v);
$finder->group_by($k);
}
# 组织数据
$rs = array();
foreach ($finder->find() as $item) {
/**
* @var $item OOP_ORM_Data
*/
$k = '';
foreach ($mapping as $m_k => $v) {
$k .= ',' . $item->{$m_k};
}
foreach ($where as $m_value) {
$k .= ',' . $m_value;
}
if ($bind) {
$k .= ',' . $item->get_data_by_field_name($bind, true);
}
if (!isset($rs[$k])) {
$rs[$k] = $item;
}
}
foreach ($group as $i => $item) {
$k = '';
foreach ($mapping as $m_key) {
$k .= ',' . $item->{$m_key};
}
foreach ($where as $m_value) {
$k .= ',' . $m_value;
}
if ($bind) {
$k .= ',' . $item->get_data_by_field_name($bind_field, true);
}
if (!isset($rs[$k])) {
# 有可能数据库中没有对应的数据
if ($type !== OOP_ORM::PARAM_TYPE_O2O) {
$current = array();
} else {
$current = null;
}
} else {
$current = $rs[$k];
if ($type === OOP_ORM::PARAM_TYPE_O2O) {
$current = current($current);
}
}
if ($item === $obj) {
$return = $current;
} else {
# 通过回调设置ORM批量获取的数据
$item->__orm_callback('set_batch_orm_data', $this->key, $current);
}
}
}
return $return;
}
