有关如何在JSON内部使用外键的方法吗？
尝试使用查询构建器，但它只返回一个任务并在位置模型中。
$positions = DB::table('positions')
->join('tasks', function ($join) {
$join->on('positions.id', '=', 'tasks.data->to_position->id');
})
->get();
{
"id": 14,
"code": "002",
"level": 1,
"side": "right",
"street_id": 1,
"position_type_id": 1,
"position_state_id": 2,
"granel": 0,
"kind": "picking",
"created_at": "2017-07-11 15:37:11",
"updated_at": "2017-07-14 16:36:38",
"task_state_id": 3,
"task_type_id": 2,
"data": "{\"orders\": [48], \"user_id\": 1, \"from_dock\": \"Muelle de ingreso pañol\", \"date_stored\": {\"date\": \"2017-07-14 16:36:38.000000\", \"timezone\": \"America/Argentina/Buenos_Aires\", \"timezone_type\": 3}, \"to_position\": {\"id\": 9, \"code\": \"002\", \"kind\": \"picking\", \"side\": \"right\", \"level\": 1, \"pivot\": {\"position_id\": 9, \"packaging_id\": 92, \"packaging_max\": 150, \"packaging_units\": 0, \"single_product_units\": 0}, \"state\": {\"id\": 3, \"state\": \"RESERVED\", \"description\": \"Tiene tareas en proceso asignandole stock\"}, \"granel\": 0, \"street\": {\"id\": 1, \"code\": \"100\", \"pallets\": 0, \"sector_id\": 1, \"description\": \"Pañol 100\", \"accept_picking\": 1}, \"street_id\": 1, \"position_type_id\": 1, \"position_state_id\": 3}, \"packaging_id\": 92, \"packaging_quantity\": 1}",
"finished": null
},