Django SingleObjectMixin

Question

我嘗試創建簡單的SingleObjectMixin類，稍後我將與render_json_response（）一起使用它來提供AJAX數據流。主要目標是網上商店的購物籃。因此，有簡單的測試類：

class Test(SingleObjectMixin): 
    model = GoodsDescription 
    slug_url_kwarg = 'test_id' 
    slug_field = 'artikul' # pk field in 'GoodsDescription' table 

    def get(self, request, *args, **kwargs): 
     self.object = self.get_object() 
     return render(request, 'temp_code.html', {'msg':self.object.name}) 

所以犯的錯誤是：

Environment: 


Request Method: GET 
Request URL: http://127.0.0.1:8000/admin/test%3D5/ 

Django Version: 1.10.5 
Python Version: 2.7.12 
Installed Applications: 
['alexbase', 
'django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'easy_thumbnails'] 
Installed Middleware: 
['django.middleware.security.SecurityMiddleware', 
'django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.common.CommonMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware'] 



Traceback: 

File "/home/user/.local/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner 
    39.    response = get_response(request) 

File "/home/user/.local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response 
    187.     response = self.process_exception_by_middleware(e, request) 

File "/home/user/.local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response 
    185.     response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "/home/user/.local/lib/python2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view 
    23.     return view_func(request, *args, **kwargs) 

Exception Type: TypeError at /admin/test=5/ 
Exception Value: object() takes no parameters 

Answer 1

SingleObjectMixin是，好了，一個mixin。這不是一個可以繼承的完整視圖。您應該使用DetailView來代替。

Answer 2

URL的conf字符串應該是正確的：

url(r'^(?:test=(?P<test_id>\d+))/$', login_required(views.TestAJAXView), name='temp_code'), 

最後，我想用類是這樣的：

class TestAJAXView(JSONResponseMixin, SingleObjectMixin): 
    model = GoodsDescription 
    slug_url_kwarg = 'test_id' 
    slug_field = 'artikul' 
    json_dumps_kwargs = {"indent": 2} 

    def get(self, request, *args, **kwargs): 
     self.object = self.get_object() 

     context_dict = { 
      "category": self.object.category, 
      "name": self.object.name 
     } 

     return self.render_json_response(context_dict) 

但異常發生，所以我想這：

class Test(SingleObjectMixin): 
    model = GoodsDescription 
    slug_url_kwarg = 'test_id' 
    slug_field = 'artikul' # pk field in 'GoodsDescription' table 

    def get(self, request, *args, **kwargs): 
     self.object = self.get_object() 
     return render(request, 'temp_code.html', {'msg':self.object.name})