Question

在我的EF数据模型中，我有一个Location实体和LocationType实体。位置具有FkLocationTypeID属性。现在，如果我从API端点返回一个Location对象，它将返回一个大对象，所有导航属性都附加到该对象。因此，我创建了LocationDto以仅返回我想要的那些属性。我的DTO看起来像这样：

 public class LocationDto
{
    public int LocationId { get; set; }
    public LocationDto ParentLocation { get; set; }
    public LocationType LocationType { get; set; }
    public string LocationName { get; set; }
    public string LocationCode { get; set; }
    // other properties here
}

现在问题是-我的DTO中有一个LocationType属性，它是一个EF对象。添加它的那一刻，由于与LocationType的所有关联，我的JSON又很长。

有没有办法避免这种情况，只检索LocationType对象？

以下是包含LocationType之后我的json的样子。

    {
  "locationId": 0,
  "locationType": {
    "locationTypeId": 0,
    "locationTypeName": "string",
    "locationTypeDisplayName": "string",
    "localizedKey": "string",
    "locations": [
      {
        "locationId": 0,
        "fkParentLocationId": 0,
        "fkLocationTypeId": 0,
        "fkTimeZoneId": 0,
        "locationName": "string",
        "locationDisplayName": "string",
        "locationCode": "string",
        "address1": "string",
        "address2": "string",
        "city": "string",
        "state": "string",
        "country": "string",
        "zipCode": "string",
        "phoneNumber": "string",
        "faxNumber": "string",
        "phoneExtention": "string",
        "email": "string",
        "longitude": 0,
        "latitude": 0,
        "useAppointments": true,
        "availabilityWindowDays": 0,
        "appointmentCutOffDays": 0,
        "dailySummaryEmailTime": "string",
        "durationBeforeFirstApptHours": 0,
        "reminderBeforeApptSmsHours": 0,
        "reminderBeforeApptEmailHours": 0,
        "createdBy": 0,
        "createdDate": "2018-10-26T06:51:00.288Z",
        "changedBy": 0,
        "changedDate": "2018-10-26T06:51:00.288Z",
        "activeStatus": 0,
        "enableStaffSelection": true,
        "showInWidget": true,
        "autoAssign_FloatPriorityMode": 0,
        "googleReserveEnabled": true,
        "messageLogs": [
          {
            "messageLogId": 0,
            "fkMessageFormatTypeId": 0,
            "fkMessageTypeId": 0,
            "fkLocationId": 0,
            "fkUserId": 0,
            "fkAppointmentId": 0,
            "sentTime": "2018-10-26T06:51:00.288Z",
            "messageUid": "string",
            "messageFormatType": {
              "messageFormatTypeId": 0,
              "messageFormatTypeName": "string",
              "messageTemplates": [
                {
                  "messageTemplateId": 0,
                  "fkMessageFormatTypeId": 0,
            .....................................
          }
       }

Answer 1

请勿将EF模型和DTO混用！
在单独的命名空间（项目，程序集）中创建完整的DTO集
使用映射器（即自动映射或类似工具）在EF模型和DTO之间进行映射

EF避免将导航属性附加到DTO

1 个答案: