如何連接3個表？

Question

就我而言，我有三個表：

• type

  • ID
  • 類型
  • 原因_id

• reason

  • ID
  • 原因

• permission

  • ID
  • type_id
  • reason_id（不確定有沒有）

我希望：

{
    "message": "Get all permissions with type and reason",
    "data": [
        {
            "id": "1",
            "types": [
                "id": "1",
                "type": "Sick",
                "reasons": [
                    "id": "1",
                    "reason": "covid-19"
                ]
            ]
        }

Answer 1

在 laravel 試試這個：

Reason::select(
    'reasons.id as reasonId',
    'reasons.reason as reason',
    'types.id as typeId',
    'types.type as type',
    'permissions.id as permissionId',
)
    ->join('types', 'reasons.id', '=', 'types.reason_id')
    ->join('permissions', 'types.id', '=', 'permissions.type_id')
    ->get();