在看似有效的 Django Rest Framework Post 请求上获取错误请求，要求在序列化程序数据中请求 FK

Question

我正在创建一个新的 SearchNeighborhood 对象并将其连接到 POST 请求中已创建的 SearchCity 对象。

我有以下型号

class SearchCity(models.Model):
    city = models.CharField(max_length=200)

class SearchNeighborhood(models.Model):
    city = models.ForeignKey(SearchCity, on_delete=models.CASCADE)
    neighborhood = models.CharField(max_length=200)

我的相关序列化程序是：

class SearchNeighborhoodSerializer(serializers.ModelSerializer):
    class Meta:
        model = SearchNeighborhood
        fields = ('pk', 'neighborhood')

我的看法和相关方法是：

class CityNeighborhoodsListCreate(APIView):
 def post(self, request, *args, **kwargs):
        citypk = kwargs.get('citypk', None)
        city=get_object_or_404(SearchCity,pk=citypk)
        serialized = SearchNeighborhoodSerializer(data=request.data)
        if serialized.is_valid(raise_exception=True):
            validatedData = serialized.validated_data
            neighborhood = validatedData.get('neighborhood')
            neighborhoodobject = SearchNeighborhood(neighborhood= neighborhood, city = city)
            neighborhoodobject.save()
            createdneighborhood = SearchNeighborhoodSerializer(neighborhoodobject)
            return Response({
                'neighborhood': createdneighborhood.data
            })

我正在使用 Angular 4

我的AJAX 请求是：

addneighborhood(){
     const payload = {
       neighborhood: this.addneighborhoodform.form.value.addneighborhoodinput
     };
     this.suitsettingsservice.addneighborhood(payload)
       .subscribe(
         (req: any)=>{
             this.selectedcityneighborhoods.push(req);
         });

我得到的错误是：

HttpErrorResponse {headers: HttpHeaders, status: 400, statusText: "Bad Request", url: "http://127.0.0.1:8000/api/suitsadmin/settings/neighborhoodbycity", ok: false, …}
error:city :  "This field is required."

这是说城市对象是必需的。但我不是在序列化程序中要求它。我不确定我做错了什么。

编辑：我尝试了这篇文章中推荐的修复： Django REST Framework : "This field is required." with required=False and unique_together

将城市对象传递给序列化器

  def post(self, request, *args, **kwargs):
        citypk = kwargs.get('citypk', None)
        city=get_object_or_404(SearchCity,pk=citypk)
        serialized = SearchNeighborhoodSerializer(city,data=request.data)

city 传入上面的序列化器

但它并没有改变任何东西

编辑：

我试图将序列化程序的城市字段设置为只读。但这也没有帮助

感谢您的帮助。

Answer 1

再次回答我自己的问题

它在我的 AJAX 中

我在 json 中包含了一个社区字段，但没有包含一个城市。为了满足 serailizer 我必须填充这个字段

addneighborhood(){
     const payload = {
       city: this.selectedcityname,
       neighborhood: this.addneighborhoodform.form.value.addneighborhoodinput
     };
     this.suitsettingsservice.addneighborhood(payload)
       .subscribe(
         (req: any)=>{
             this.selectedcityneighborhoods.push(req);
         });