protected function format_field_value(OOP_ORM_Data $obj, &$data, $new_data, $format_type)
{
# 数据主键
$id = $obj->pk(',');
# 这个是对应主表的表名称，它和元数据的 table_name 字段是对应的
$table = $obj->finder()->tablename();
# 这个是metadata所在的表名称
$my_table = $this->table_name;
$meta_group = $this->meta_group;
if (null === $new_data || '' === $new_data || array() === $new_data) {
# 删除了
# 读取已经加载的所有元数据
$old_metadata = $obj->__orm_callback('get_metadata');
if (isset($old_metadata[$my_table][$meta_group])) {
foreach ($old_metadata[$my_table][$meta_group] as $hash => $item) {
# 遍历所有当前组的数据
if ($item['table_name'] === $table && $item['field_name'] === $this->field_name) {
# 把当前字段的数据全部设置成 null 以便进行删除处理
$data[$my_table][$hash] = null;
}
}
}
return;
}
# 读取已经加载的所有元数据
$old_metadata = $obj->__orm_callback('get_metadata');
$old_item_data = array();
if (isset($old_metadata[$my_table][$meta_group])) {
foreach ($old_metadata[$my_table][$meta_group] as $hash => $item) {
# 把数据整理到一个数组里
if ($item['table_name'] === $table && $item['field_name'] === $this->field_name) {
# 把当前字段的数据全部设置成 null 以便进行删除处理
$old_item_data[$hash] = $item;
}
}
}
# 读取新数据
if ($this->config['depth']) {
# 处理多行数据
$new_item_data = array();
foreach ($new_data as $k => $v) {
$tmp = $this->get_meta_item($table, $id, $k, $v);
$new_item_data[$tmp['hash']] = $tmp;
}
} else {
$tmp = $this->get_meta_item($table, $id, 0, $new_data);
$new_item_data[$tmp['hash']] = $tmp;
}
foreach ($new_item_data as $hash => $item) {
$tmp_value = $item['meta_value'];
if ($tmp_value !== array() && null !== $tmp_value) {
if ($format_type) {
# 动态格式化
if (is_array($tmp_value) || is_object($tmp_value)) {
$tmp_value = serialize($tmp_value);
}
} elseif (isset($this->config['format']) && $this->config['format']) {
# 格式化数据
$this->_format_data($tmp_value);
}
}
$tmp_value = (string) $tmp_value;
if ('' === $tmp_value) {
# 空字符串，则移除 null
unset($new_item_data[$hash]);
} else {
$new_item_data[$hash]['meta_value'] = $tmp_value;
if (isset($old_item_data[$hash]) || array_key_exists($hash, $old_item_data)) {
if ($old_item_data[$hash]['meta_value'] === $tmp_value) {
# 相同数据，全部去掉掉则不更新
unset($new_item_data[$hash]);
unset($old_item_data[$hash]);
} else {
unset($old_item_data[$hash]);
}
}
}
}
# 把老数据清理掉
if ($old_item_data) {
foreach ($old_item_data as $hash => $item) {
$new_item_data[$hash] = null;
}
}
$new_data = $new_item_data;
if (isset($data[$my_table])) {
$data[$my_table] += $new_data;
} else {
$data[$my_table] = $new_data;
}
}
/**
* 加载对应数据库所有元数据
*
* @param OOP_ORM_Data $obj
* @return $this
* @throws Exception
*/
public function load_all_metadata(OOP_ORM_Data $obj)
{
$class_name = $obj->class_name();
$meta_table_of_key = OOP_ORM_DI::get_meta_table_of_key($class_name);
$meta_group_of_key = OOP_ORM_DI::get_meta_group_of_key($class_name);
if (!$meta_table_of_key) {
# 没有元数据
return $this;
}
# 没有主键
if (!$obj->pk()) {
return $this;
}
$keys_of_table = array();
foreach ($meta_table_of_key as $key => $table) {
$keys_of_table[$table][] = $key;
}
$data = array();
$groups_of_table = array();
# 读数据
foreach ($keys_of_table as $table => $keys) {
foreach ($this->load_metadata($obj, $table) as $hash => $item) {
$data[$table][$item['meta_group']][$hash] = $item;
}
foreach ($keys as $key) {
$group = $meta_group_of_key[$key];
$groups_of_table[$table][$group] = $group;
}
}
foreach ($groups_of_table as $table => $groups) {
foreach ($groups as $group) {
# 预置空数据
$obj->__orm_callback('set_metadata', $table, $group, array());
}
}
foreach ($data as $table => $group_data) {
foreach ($group_data as $group => $item) {
$obj->__orm_callback('set_metadata', $table, $group, $item);
}
}
return $this;
}