CheckType::class, 'check_status' => CheckStatus::class, 'is_enable' => 'boolean', 'subject_data' => 'json', ]; public function user() { return $this->belongsTo(Employee::class, 'user_id'); } public function checkUser() { return $this->belongsTo(Employee::class, 'check_user_id'); } public function subject() { // 定义反向关联 // $this->morphMany(WorkflowLog::class, 'subject'); return $this->morphTo(); } }