Django中的外键管理Tastypie

Question

我正在尝试使用API​​插入数据，并且想要管理将数据传递给外键的方式。不过，我不断收到空值，即使他们不在束空

MODELS.PY

class LCUser(models.Model): 
     email = models.CharField(max_length=100,unique=True) 
     password = models.CharField(max_length=100) 
     first_name = models.CharField(max_length=100) 
     last_name=models.CharField(max_length=100) 

     class Meta: 
      db_table = "user" 

    class UserProfile(models.Model): 
     user = models.ForeignKey(LCUser, on_delete=models.CASCADE,primary_key=True) 
     mobile_phone = models.IntegerField() 
     city=models.CharField(max_length=50) 

     class Meta: 
      db_table = "profile" 

API.PY

class MultipartResource(object): 

    def deserialize(self, request, data, format=None): 

     if not format: 
      format = request.META.get('CONTENT_TYPE', 'application/json') 

     if format == 'application/x-www-form-urlencoded': 
      return request.POST 

     if format.startswith('multipart/form-data'): 
      multipart_data = request.POST.copy() 
      multipart_data.update(request.FILES) 
      return multipart_data 

     return super(MultipartResource, self).deserialize(request, data, format) 

    def put_detail(self, request, **kwargs): 
     if request.META.get('CONTENT_TYPE', '').startswith('multipart/form-data') and not hasattr(request, '_body'): 
      request._body = '' 
     return super(MultipartResource, self).put_detail(request, **kwargs) 

    def patch_detail(self, request, **kwargs): 
     if request.META.get('CONTENT_TYPE', '').startswith('multipart/form-data') and not hasattr(request, '_body'): 
      request._body = '' 
     return super(MultipartResource, self).patch_detail(request, **kwargs)  

class ProfileResource(MultipartResource,ModelResource): 
#Get the id from the request and obtain the correcct user object 
    user_id = LCUser.objects.get(id=1) #For testing 
    class Meta: 
     queryset = UserProfile.objects.all() 
     resource_name = 'profile' 
     authorization = Authorization() 

    def obj_create(self,bundle,request=None,**kwargs): 
     try: 
      print repr(bundle) 
      bundle = super(ProfileResource, self).obj_create(bundle, request=request, **kwargs) 
      bundle.obj.save() 
     except: 
      traceback.print_exc() 
      raise BadRequest('Error') 
     return bundle 

REQUEST

POST /api/profile/? HTTP/1.1 
Host: 127.0.0.1:8000 
Cache-Control: no-cache 
Postman-Token: c3cddfd3-a2ec-06fc-e916-ed5ff8f21077 
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW 

----WebKitFormBoundary7MA4YWxkTrZu0gW 
Content-Disposition: form-data; name="user" 

1 
----WebKitFormBoundary7MA4YWxkTrZu0gW 
Content-Disposition: form-data; name="mobile_phone" 

123 
----WebKitFormBoundary7MA4YWxkTrZu0gW 
Content-Disposition: form-data; name="city" 

123 

当我尝试插入我得到一个完整性错误， IntegrityError：列“user_id”中的空值违反不是空约束 失败行包含（NULL，123，123）

束

<Bundle for obj: 'UserProfile object' and with data: '{'mobile_phone': u'123', 'user': u'1', 'city': u'123'}'> 

Answer 1

您需要手动在你的资源指定相关领域：也http://django-tastypie.readthedocs.org/en/latest/fields.html?highlight=meta#toonefield

class UserResource(MultipartResource, ModelResource): 
    class Meta: 
     queryset = User.objects.all() 
     resource_name = 'user' 

class ProfileResource(MultipartResource, ModelResource): 
    user = fields.ToOneField(UserResource) 

    class Meta: 
     queryset = UserProfile.objects.all() 
     resource_name = 'profile' 
     authorization = Authorization() 

    def obj_create(self, bundle, request=None, **kwargs): 
     try: 
      print repr(bundle) 
      bundle = super(ProfileResource, self).obj_create(bundle, request=request, **kwargs) 
      bundle.obj.save() 
     except: 
      traceback.print_exc() 
      raise BadRequest('Error') 
     return bundle 

，唐忘记配置您的授权和身份验证。

Answer 2

那么我设法通过覆盖obj_create方法来解决它。

def obj_create(self, bundle, request=None, **kwargs): 
    try: 
     bundle.obj = UserProfile(user_id=bundle.data['user'], mobile_phone=bundle.data['mobile_phone'],city=bundle.data['city']) 
     bundle.obj.save() 
    except: 
     traceback.print_exc() 
     raise #On error raise it back to wrap_view() 
    return bundle