KeyError at/farm django python

我刚刚学了烧瓶之后，我在学习django。我有一个项目，我必须在烧瓶中做，现在在django有相同的项目。我尽管用相同的代码去“转换”过来。它在/ farm处抛出一个错误KeyError。如果有人能告诉我在上班途中KeyError at/farm django python

每个请求的错误是在代码

if request.POST["building"] == "farm": 
    request.session['farmprint']+= 'Earned' +str(request.session['farm']) + 'golds from the farm!' 

if request.POST["building"] == "cave": 
    request.session['farmprint']+= "Earned" +str(request.session['cave']) + 'golds from the cave!' 

if request.POST["building"] == "house": 
    sessrequest.sessionion['farmprint']+= "Earned" +str(request.session['house']) + 'golds from the house' 

if request.POST["building"] == "casino": 
    if request.session['casino'] > 0: 
     request.session['farmprint']+= "Earned" +str(request.session['casino']) + 'golds from the casino' 
if request.POST["building"] == "casino": 
    if request.session['casino'] < 0: 
     request.session['farmprint']+= "Earned" +str(request.session['casino']) + 'golds from the casino' 

    return render(request.session, 'ninjagold/index.html') 

else: 
    return render(request.session, 'ninjagold/index.html')

完全踪迹，这部分回如下

Traceback: 

File "C:\Users\dbhol\Desktop\DojoAssignments\Python\myenvirnoments\djangoENv\lib\site-packages\django\core\handlers\exception.py" in inner 
    42.    response = get_response(request) 

File "C:\Users\dbhol\Desktop\DojoAssignments\Python\myenvirnoments\djangoENv\lib\site-packages\django\core\handlers\base.py" in _get_response 
    187.     response = self.process_exception_by_middleware(e, request) 

File "C:\Users\dbhol\Desktop\DojoAssignments\Python\myenvirnoments\djangoENv\lib\site-packages\django\core\handlers\base.py" in _get_response 
    185.     response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "C:\Users\dbhol\Desktop\DojoAssignments\Python\myenvirnoments\project7\ningagold\apps\ninjagold\views.py" in building 
    48.  print request.session['farmprint'] 

File "C:\Users\dbhol\Desktop\DojoAssignments\Python\myenvirnoments\djangoENv\lib\site-packages\django\contrib\sessions\backends\base.py" in __getitem__ 
    57.   return self._session[key] 

Exception Type: KeyError at /farm 
Exception Value: 'farmprint' 
HTML 

<!DOCTYPE html> 
<html> 
<head> 
    <title></title> 
    <meta charset="utf-8"> 
    <script type="text/javascript" src='http://code.jquery.com/jquery-1.10.2.min.js'></script> 
    <script> 
    </script> 

</head> 
<body> 
<div><P>Farm</P><form action="/farm" method="post"> 
    {% csrf_token %} 
    <input type="hidden" name="building" value="farm" /> 
    <input type="submit" value="Find Gold!"/> 
</form> </div> 
<div><p>Cave</p><form action="/farm" method="post"> 
    {% csrf_token %} 
    <input type="hidden" name="building" value="cave" /> 
    <input type="submit" value="Find Gold!"/> 
</form> </div> 
<div><p>House</p><form action="/farm" method="post"> 
    {% csrf_token %} 
    <input type="hidden" name="building" value="house" /> 
    <input type="submit" value="Find Gold!"/> 
</form> </div> 
<div><p>Casino</p><form action="/farm" method="post"> 
    {% csrf_token %} 
    <input type="hidden" name="building" value="casino" /> 
    <input type="submit" value="Find Gold!"/> 
</form> </div> 
<div><p> 
</p></div> 
</form> 
</body> 
</html> 
views.py 

from django.shortcuts import render, redirect, HttpResponse 
import random 
import string 

def index(request): 
    return render(request, 'ninjagold/index.html') 

def building(request): 
    if request.method == ['POST']: 
     try: 
      request.session['farmprint'] += "" 
     except Exception: 
      request.session['farmprint'] = "" 
     try: 
      request.session['caveprint'] += "" 
     except Exception: 
      request.session['caveprint'] = "" 
     try: 
      request.session['houseprint'] += "" 
     except Exception: 
      request.session['houseprint'] = "" 
     try: 
      request.session['casinoprint'] += "" 
     except Exception: 
      request.session['casinoprint'] = "" 
    request.session['farm'] = 0 
    request.session['cave'] = 0 
    request.session['house'] = 0 
    request.session['casino'] = 0 
    if 'gold' not in request.session: 
     request.session['gold'] = 0 
    if request.POST["building"] == "farm": 
     request.session['farm'] = random.randint(10, 20) 
     print request.session['farm'] 
    elif request.POST["building"] == "cave": 
     request.session['cave'] = random.randint(5, 10) 
     print request.session['cave'] 
    elif request.POST["building"] == "house": 
     request.session['house'] = random.randint(2, 5) 
     print request.session['house'] 
    elif request.POST["building"] == "casino": 
     request.session['casino'] = random.randint(-50, 50) 
     print request.session['casino'] 
    if request.POST["building"] == "farm": 
     request.session['farmprint'] += 'Earned' +str(request.session['farm']) + 'golds from the farm!\n' 

    if request.POST["building"] == "cave": 
     request.session['farmprint'] += "Earned" +str(request.session['cave']) + 'golds from the cave!\n'  
    if request.POST["building"] == "house": 
     sessrequest.sessionion['farmprint'] += "Earned" +str(request.session['house']) + 'golds from the house\n' 
    if request.POST["building"] == "casino": 
     if request.session['casino'] > 0: 
      request.session['farmprint'] += "Earned" +str(request.session['casino']) + 'golds from the casino\n'  
    if request.POST["building"] == "casino": 
     if request.session['casino'] < 0: 
      request.session['farmprint'] += "Earned" +str(request.session['casino']) + 'golds from the casino\n'  
     return render(request.session, 'ninjagold/index.html') 
    else: 
     return render(request.session, 'ninjagold/index.html') 
urls.py 

from django.conf.urls import url 
from . import views 
from django.template import RequestContext 

urlpatterns = [ 
    url(r'^$', views.index), 
    url(r'^farm$', views.building) 
]

来源

2017-03-16 David Hollenbeck

最初在哪里设置request.session ['farmprint']'？ –

不需要在烧瓶中放置其他地方。我应该把它设置为0吗？开始？ –

在哪里打印request.session ['farmprint']'？ –

看来，无论是：

你有一个print声明（print request.session['farmprint']）的request.session['farmprint']在什么地方实际上是充满价值或
你有这个print声明（print request.session['farmprint']），并永远不会执行的值填充request.session['farmprint']的代码。顺便说一下，你永远不会初始化request.session['farmprint']。只有当请求方法是POST时才可以。

来源

2017-03-16 17:27:59

我遇到的问题的答案是我有一个[POST]错误，而不是'POST'，因为我删除了它的工作。

来源

2017-03-16 17:36:37

去大卫的路。恭喜。将您的答案标记为已接受且快乐的编码！ –

回答

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