title: Error Domain=com.alamofire.error.serialization.response Code=-1011 "Request failed: bad request (400)
body: <p>I am using AFnetworking library to post data on server.</p>
  
  <p>Following is my code to post data on server.</p>
  
  <pre><code>- (void) callLoginAPI:(NSDictionary *)dictProfile{
      // 1
      NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:[dictProfile valueForKey:@"name"], @"username",
                                                                      [dictProfile valueForKey:@"first_name"],@"first_name",
                                                                      [dictProfile valueForKey:@"last_name"],@"last_name",
                                                                      [dictProfile valueForKey:@"email"],@"email",
                                                                      [dictProfile valueForKey:@"birthday"],@"dob",
                                                                      [dictProfile valueForKey:@"gender"],@"gender",
                                                                      [[dictProfile valueForKey:@"location"] valueForKey:@"name"],@"location",
                                                                      [dictProfile valueForKey:@"timezone"],@"timezone",
                                                                      @"",@"language",
                                                                      [NSString stringWithFormat:@"http://graph.facebook.com/%@/picture?type=large",[dictProfile valueForKey:@"id"]],@"profile_pic_url",
                                                                      @"",@"cover_pic_url",nil];
  
      AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
      manager.requestSerializer = [AFJSONRequestSerializer serializer];
  
      [manager POST:@"http://10.1.81.35:8000/api/login/" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
          NSLog(@"JSON: %@", responseObject);
      } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
          NSLog(@"Error: %@", error);
      }];
  }
  </code></pre>
  
  <p>and in response I got following error</p>
  
  <pre><code>Error Domain=com.alamofire.error.serialization.response Code=-1011 "Request failed: bad request (400)" UserInfo=0x7c87b6f0 {com.alamofire.serialization.response.error.response=&lt;NSHTTPURLResponse: 0x7cc220e0&gt; { URL: http://10.1.81.35:8000/api/login/ } { status code: 400, headers {
      Allow = "POST, OPTIONS";
      "Content-Type" = "application/json";
      Date = "Tue, 07 Oct 2014 10:45:08 GMT";
      Server = "WSGIServer/0.1 Python/2.7.6";
      Vary = "Accept, Cookie";
      "X-Frame-Options" = SAMEORIGIN;
  } }, NSErrorFailingURLKey=http://10.1.81.35:8000/api/login/, NSLocalizedDescription=Request failed: bad request (400), com.alamofire.serialization.response.error.data=&lt;7b226465 7461696c 223a2022 4a534f4e 20706172 73652065 72726f72 202d204e 6f204a53 4f4e206f 626a6563 7420636f 756c6420 62652064 65636f64 6564227d&gt;}
  </code></pre>
  
  <p>I am not able to understand why I got the such kind of error. What is missing in my code?</p>