无法测试数据存储操作

Question

我一直在尝试测试“从我的博客中读取帖子”，但看起来处理程序使用的数据存储区与测试使用的数据存储区不同。

这是测试：

def test_read_handler(self): 
    self.testbed.init_memcache_stub() 
    self.testbed.init_datastore_v3_stub() 
    self.testbed.init_user_stub() 
    data = { 
     'primary_title': 'Primary Post Title', 
     'secondary_title': 'Secondary Post Title', 
     'content': 'This is a sample' 
    } 
    new_post = models.Post(primary_title=data['primary_title'], secondary_title=data['secondary_title'], 
          content=data['content']) 
    key = new_post.put() 

    response = self.test_app.get('/read', {'id': key.id()}) 

    self.assertEqual(response.status_int, 200) 
    self.assertEqual(response.content_type, 'application/json') 
    self.assertEqual(response.json, 'OK') 

这是处理程序：

class ReadHandler(webapp2.RequestHandler): 
    def get(self): 
     post_id = self.request.get('id') 
     returned_post = models.Post.get_by_id(post_id) 
     self.response.headers['Content-Type'] = 'application/json' 
     self.response.out.write(json.dumps(returned_post.to_dict())) 

这是我得到的错误：

test_read_handler (tests.BlogTest) ... ERROR:root:'NoneType' object has no attribute 'to_dict' 
Traceback (most recent call last): 
    File "/usr/local/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1535, in __call__ 
    rv = self.handle_exception(request, response, e) 
    File "/usr/local/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1529, in __call__ 
    rv = self.router.dispatch(request, response) 
    File "/usr/local/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1278, in default_dispatcher 
    return route.handler_adapter(request, response) 
    File "/usr/local/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1102, in __call__ 
    return handler.dispatch() 
    File "/usr/local/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 572, in dispatch 
    return self.handle_exception(e, self.app.debug) 
    File "/usr/local/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 570, in dispatch 
    return method(*args, **kwargs) 
    File "/vagrant/blog.py", line 28, in get 
    self.response.out.write(json.dumps(returned_post.to_dict())) 
AttributeError: 'NoneType' object has no attribute 'to_dict' 

任何想法，我可能是失踪？

Answer 1

在你的处理器，你需要投你寻找到一个int ID - 作为一个请求参数，它会被视为一个字符串：

class ReadHandler(webapp2.RequestHandler): 
    def get(self): 
     post_id = int(self.request.get('id')) 
     returned_post = models.Post.get_by_id(post_id) 
     self.response.headers['Content-Type'] = 'application/json' 
     self.response.out.write(json.dumps(returned_post.to_dict()))