'datetime', 'expected_return_at' => 'datetime', 'returned_at' => 'datetime', ]; public function tool() { return $this->belongsTo(MaintenanceTool::class, 'tool_id'); } public function user() { return $this->belongsTo(User::class, 'user_id'); } public function workOrder() { return $this->belongsTo(WorkOrder::class, 'work_order_id'); } public function equipment() { return $this->belongsTo(Equipment::class, 'equipment_id'); } }