如何在改造中以多部分形式以 POJO 形式发送嵌套的 json 数据？

Question

我正在尝试发送将以这种形式显示的数据：

{
    "id": ,
    "venue": {
        "id": ,
        "name": "",
        "city": "",
        "address": "",
        "rating": null,
        "point": null
    },
    "name": "",
    "time": "",
    "event_pic": null,
    "description": "",
    "event_type": "Movie",
    "invite_only": ,
    "free": ,
    "age_restriction": ,
    "ticket_price": ,
    "user": 
}

我使用改造制作了这样的界面：

 @Multipart
    @POST("api/events/")
    Observable<Event> postEvent(
            @Part("venue") Venue venue,
            @Part("event_pic") RequestBody image,
            @Part("name") RequestBody name,
            @Part("description") RequestBody description,
            @Part("time") RequestBody date,
            @Part("event_type") RequestBody type,
            @Part("invite_only") RequestBody isInviteOnly,
            @Part("age_restriction") RequestBody isAgeRestricted,
            @Part("free") RequestBody isFree,
            @Part("ticket_price") RequestBody ticketPrice

    );

它是使用 rxjava 发布的，如下所示：

public void postEvent() {
        postEventUseCase.setAgeRestricted(ageRestricted);
        postEventUseCase.setDate(date);
        postEventUseCase.setFree(free);
        postEventUseCase.setInviteOnly(inviteOnly);
        postEventUseCase.setDescription(description);
        postEventUseCase.setName(name);
        postEventUseCase.setPath(path);
        postEventUseCase.setTicketprice(ticketprice);
        postEventUseCase.setType(type);
        postEventUseCase.setVenue(venue);

        subscription = postEventUseCase.execute().subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe();


    }

但是，当我尝试发布它时，我收到此错误：02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: <-- 400 Bad

Request http://zacmwa.pythonanywhere.com/api/events/ (7417ms)
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: Server: openresty/1.9.15.1
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: Date: Tue, 14 Feb 2017 13:21:26 GMT
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: Content-Type: application/json
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: Transfer-Encoding: chunked
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: Connection: keep-alive
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: Vary: Accept
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: X-Frame-Options: SAMEORIGIN
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: Allow: GET, POST, OPTIONS
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: {"venue":["This field is required."]}
    02-14 16:21:26.468 7133-7762/com.wyat.wyat D/OkHttp: <-- END HTTP (37-byte body)

编辑：

然而，日志显示场地已创建：

 02-14 16:21:18.620 7133-7762/com.wyat.wyat D/OkHttp: Content-  Disposition: form-data; name="venue"
02-14 16:21:18.620 7133-7762/com.wyat.wyat D/OkHttp: Content-Transfer-Encoding: binary
02-14 16:21:18.620 7133-7762/com.wyat.wyat D/OkHttp: Content-Type: application/json; charset=UTF-8
02-14 16:21:18.620 7133-7762/com.wyat.wyat D/OkHttp: Content-Length: 59
02-14 16:21:18.620 7133-7762/com.wyat.wyat D/OkHttp: {"address":"ersysaj","city":"ahgsagya","name":"hdyfjfnfjf"}

我如何发布数据？ 我已经用其他方式成功地做到了，所以我知道问题不在后端。 导致错误的原因是什么？

场地POJO是这样的：

public class Venue {

    @SerializedName("name")
    @Expose
    private String name;
    @SerializedName("city")
    @Expose
    private String city;
    @SerializedName("address")
    @Expose
    private String address;
    @SerializedName("rating")
    @Expose
    private Double rating;



    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Venue withName(String name) {
        this.name = name;
        return this;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }


    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }


    public double getRating() {
        return rating;
    }

    public void setRating(double rating) {
        this.rating = rating;
    }



}

Answer 1

你可以将它作为自定义对象发送，你可以在你的应用程序中制作这比字段更好

并且可以做到这样

@POST("api/events/")
Call<ResponseBody> events(@Body CustomObject obj);

你的对象可以嵌套任何你想要的东西

Answer 2

@Headers("Content-Type: application/json; charset=utf-8")
@POST("api/events/")
Call<ResponseBody> events(@Body String body);

在正文中发送 json

解决方案2：

MultipartBody.Part typedFile = MultipartBody.Part.createFormData("event_pic",imagefile.getName(),RequestBody.create(MediaType.parse("image"), imagefile));

 String jsonString=""venue": { "id": , "name": "", "city": "", "address": "", "rating": null, "point": null }"; 
 RequestBody venue = RequestBody.create(okhttp3.MediaType.parse("application/json‌​; charset=utf-8"),jsonString);

        @POST("api/events/")
    Observable<Event> postEvent(
            @Part("venue")  RequestBody body,
            @Part MultipartBody.Part image,
            @Part("name") RequestBody name,
            @Part("description") RequestBody description,
            @Part("time") RequestBody date,
            @Part("event_type") RequestBody type,
            @Part("invite_only") RequestBody isInviteOnly,
            @Part("age_restriction") RequestBody isAgeRestricted,
            @Part("free") RequestBody isFree,
            @Part("ticket_price") RequestBody ticketPrice

    );