[英]How to hide created_at and updated_at when using ActiveModel::Serializer
我在rails應用程序中使用active_model_serializers
可以正常工作,但是在處理關聯時,它將返回我不想返回的關聯模型的所有屬性(包括created_at和updated_at)。
class ReservationSerializer < ActiveModel::Serializer
attributes :id, :pnr_no, :train_no, :passenger_name, :from_to,
:travel_class, :cancelled, :travel_time
has_many :reservation_seats
end
...
attributes of reservation are returned, which are fine therefore only
including the relationship attributes i.e for reservation_seats
...
"relationships": {
"reservation-seats": {
"data": [
{
"id": 4,
"reservation-id": 5,
"seat-no": "26",
"position" : "2",
"created-at": "2017-05-27T23:59:56.000+05:30",
"updated-at": "2017-05-27T23:59:56.000+05:30"
}
]
}
我也嘗試創建一個新文件,在其中定義了需要返回的屬性,但是在這種情況下,它只是返回類型。
class ReservationSeatSerializer < ActiveModel::Serializer
attributes :id, :seat_no, :position
belongs_to :reservation
end
這導致:
"relationships": {
"reservation-seats": {
"data": [
{
"id": "4",
"type": "reservation-seats"
}
]
}
}
基本上,對於關聯,我只希望返回幾個屬性。
謝謝
JSON API規范希望您僅通過添加關系的類型和標識符來減少響應數據和數據庫請求。 如果要包含相關對象,則必須包含它:
ActiveModelSerializer示例:
render json: @reservation, include: '*'
這包括所有關系的遞歸。 這些相關對象將最終出現在included
數組中。
您可以嘗試在其中添加關聯的序列化器:
class ReservationSerializer < ActiveModel::Serializer
attributes :id, :pnr_no, :train_no, :passenger_name, :from_to,
:travel_class, :cancelled, :travel_time
has_many :reservation_seats
class ReservationSeatSerializer < ActiveModel::Serializer
attributes :id, :seat_no, :position
end
end
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