數據沒有使用jQuery發送到Django視圖

Question

我試圖使用Ajax發送數據，但是變量input_text，rotate總是採用默認情況下的值（input_text =''，rotate = 0）。 如果使用request.POST [ '文本']，然後我得到一個錯誤500 request.POST是空 異常類型：MultiValueDictKeyError在/加密 異常值： 「 '文本'」 views.py：

def encrypt(request): 
    input_text = request.POST.get('text','') 
    rotate = request.POST.get('rotate', 0) 
    output_text = models.encode(input_text, rotate) 
    frequency = models.get_frequency(input_text) 
    key = models.get_key(input_text) 
    data = {'input_text': input_text, 'rotate': rotate, 'output_text': output_text, 'frequency': frequency, 'key': key} 
    return HttpResponse(json.dumps(data)) 

home.html做爲：

$("#encrypt").click(function() { 
     var postData = { 
      text: $("#input-box").val(), 
      rotate: $("#rotate").val() 
     }; 
     $.ajax({ 
      url: "encrypt", 
      type: "POST", 
      data: postData, 
      dataType: "json", 
      contentType: "application/json", 
      success: function(data) { 
       console.log(data); 
       $("#input-box").val(data.input_text); 
      }, 
      error : function(xhr,errmsg,err) { 
      console.log(xhr.status + ": " + xhr.responseText); 
      } 
     }); 
     return false; 
    }); 

控制檯如果request.POST [ '文本']：

500: MultiValueDictKeyError at /encrypt 
"'text'" 

Request Method: POST 
Request URL: http://127.0.0.1:8000/encrypt 
Django Version: 1.9.5 
Python Executable: C:\Program Files (x86)\Python35-32\python.exe 
Python Version: 3.5.1 
Python Path: ['C:\\Users\\Влад\\PycharmProjects\\CezarProject', 'C:\\Users\\Влад\\PycharmProjects\\CezarProject', 'C:\\Program Files (x86)\\Python35-32\\python35.zip', 'C:\\Program Files (x86)\\Python35-32\\DLLs', 'C:\\Program Files (x86)\\Python35-32\\lib', 'C:\\Program Files (x86)\\Python35-32', 'C:\\Program Files (x86)\\Python35-32\\lib\\site-packages'] 
Server time: Tue, 12 Apr 2016 15:17:12 +0300 
Installed Applications: 
['django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'caesar'] 
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.auth.middleware.SessionAuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware'] 


Traceback: 

File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\utils\datastructures.py" in __getitem__ 
    83.    list_ = super(MultiValueDict, self).__getitem__(key) 


     During handling of the above exception ('text'), another exception occurred: 



File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\core\handlers\base.py" in get_response 
    149.      response = self.process_exception_by_middleware(e, request) 

File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\core\handlers\base.py" in get_response 
    147.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "C:\Users\Влад\PycharmProjects\CezarProject\caesar\views.py" in encrypt 
    12.  input_text = request.POST['text'] 

File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\utils\datastructures.py" in __getitem__ 
    85.    raise MultiValueDictKeyError(repr(key)) 

Exception Type: MultiValueDictKeyError at /encrypt 
Exception Value: "'text'" 
Request information: 
GET: No GET data 

POST: No POST data 

FILES: No FILES data 

控制檯如果熱曲est.POST.get（ '文本'）：

500: TypeError at /encrypt 
'NoneType' object is not iterable 

Request Method: POST 
Request URL: http://127.0.0.1:8000/encrypt 
Django Version: 1.9.5 
Python Executable: C:\Program Files (x86)\Python35-32\python.exe 
Python Version: 3.5.1 
Python Path: ['C:\\Users\\Влад\\PycharmProjects\\CezarProject', 'C:\\Users\\Влад\\PycharmProjects\\CezarProject', 'C:\\Program Files (x86)\\Python35-32\\python35.zip', 'C:\\Program Files (x86)\\Python35-32\\DLLs', 'C:\\Program Files (x86)\\Python35-32\\lib', 'C:\\Program Files (x86)\\Python35-32', 'C:\\Program Files (x86)\\Python35-32\\lib\\site-packages'] 
Server time: Tue, 12 Apr 2016 15:18:28 +0300 
Installed Applications: 
['django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'caesar'] 
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.auth.middleware.SessionAuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware'] 


Traceback: 

File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\core\handlers\base.py" in get_response 
    149.      response = self.process_exception_by_middleware(e, request) 

File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\core\handlers\base.py" in get_response 
    147.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "C:\Users\Влад\PycharmProjects\CezarProject\caesar\views.py" in encrypt 
    14.  output_text = models.encode(input_text, rotate) 

File "C:\Users\Влад\PycharmProjects\CezarProject\caesar\models.py" in encode 
    14.  for char in input_text: 

Exception Type: TypeError at /encrypt 
Exception Value: 'NoneType' object is not iterable 
Request information: 
GET: No GET data 

POST: No POST data 

FILES: No FILES data 

Answer 1

你忘了包括以JSON

的關鍵雙引號（「）

使用正確的語法Json in Javascript

var postData = { 
      "text": $("#input-box").val(), 
      "rotate": $("#rotate").val() 
     };