belongsTo(Plant::class); } public function checkPointTimes1() { return $this->hasMany(CheckPointTime::class, 'check_point1_id', 'id'); } public function checkPointTimes2() { return $this->hasMany(CheckPointTime::class, 'check_point2_id', 'id'); } public function guardPatrolEntries() { return $this->hasMany(GuardPatrolEntry::class, 'check_point_name_id', 'id'); } }