Django Rest Framework - 在同一個API調用中的兩個模型

Question

我試圖用Django Rest框架做一件事。 我有一個類通過外鍵鏈接到另一個類。 現在，我想創建一個API調用創建這兩個模型。

class A(models.Model): 
    text = models.CharField(...) 
... 


class B(models.Model): 
... 
     myfield= models.ForeignKey(A) 

這很好。

class SerializerForB(serializers.HyperlinkedModelSerializer): 
    text = serializers.CharField() 
.... 

這也很好（我已經設置了meta等）。如果我去的API，我看到表格B加一的所有字段的URL把文本A.

然後我寫了這個觀點

class BCreate(CreateAPIView): 
    serializer_class = SerializerForB 


def pre_save(self, obj): 
    b = B(text=self.request.DATA['text']) 
    b.save() 
    obj.B=b 

的萬阿英，蔣達清與實際工作中節省的，並且數據具有場text事實上，它說

'text' is an invalid keyword argument for this function 

我應該寫一個API創建並使用pk當我創建通過API個B？或者我可以在一個電話中做到這一點？

環境：

Request Method: POST 
Request URL: http://localhost:8000/api/task/human/create/ 

Django Version: 1.5.1 
Python Version: 2.7.2 
Installed Applications: 
('django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.sites', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'django.contrib.humanize', 
'django.contrib.messages', 
'django.contrib.flatpages', 
'django.contrib.markup', 
'django.contrib.admin', 
'general', 
'requester', 
'executor', 
'crispy_forms', 
'social_auth', 
'developer', 
'restapi', 
'requests', 
'rest_framework', 
'rest_framework.authtoken', 
'djrill', 
'mturk', 
'jsonify', 
'gravatar') 
Installed Middleware: 
('django.middleware.common.CommonMiddleware', 
'django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware') 


Traceback: 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 
    115.       response = callback(request, *callback_args, **callback_kwargs) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/django/views/generic/base.py" in view 
    68.    return self.dispatch(request, *args, **kwargs) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/django/views/decorators/csrf.py" in wrapped_view 
    77.   return view_func(*args, **kwargs) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/rest_framework/views.py" in dispatch 
    326.    response = self.handle_exception(exc) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/rest_framework/views.py" in dispatch 
    323.    response = handler(request, *args, **kwargs) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/rest_framework/generics.py" in post 
    361.   return self.create(request, *args, **kwargs) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/rest_framework/mixins.py" in create 
    50.   if serializer.is_valid(): 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/rest_framework/serializers.py" in is_valid 
    478.   return not self.errors 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/rest_framework/serializers.py" in errors 
    470.     ret = self.from_native(data, files) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/rest_framework/serializers.py" in from_native 
    866.   instance = super(ModelSerializer, self).from_native(data, files) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/rest_framework/serializers.py" in from_native 
    323.    return self.restore_object(attrs, instance=getattr(self, 'object', None)) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/rest_framework/serializers.py" in restore_object 
    851.    instance = self.opts.model(**attrs) 
File "/Users/stefanotranquillini/.virtualenvs/CC/lib/python2.7/site-packages/django/db/models/base.py" in __init__ 
    415.     raise TypeError("'%s' is an invalid keyword argument for this function" % list(kwargs)[0]) 

Exception Type: TypeError at /api/task/human/create/ 
Exception Value: 'reward_quantity' is an invalid keyword argument for this function 

Answer 1

模型類「B」是提高你所看到的例外，當您嘗試與B(text=self.request.DATA['text'])初始化它，想必模型類B沒有text場。