当视图模型关联规则:public $viewFields不为空时,$this->add()后的SQL语句为:INSERT INTO cooperation_v2_task cooperation_v2_task LEFT JOIN patient patient ON cooperation_v2_task.pat_id=patient.user_id LEFT JOIN doctors doctors ON cooperation_v2_task.doc_id=doctors.user_id (`create_time`) VALUES (1438749638)
当视图模型关联规则:public $viewFields为空时,$this->add()后的SQL语句为:INSERT INTO (`create_time`) VALUES (1438750038)