Django：NameError at/approved/filter/7/- name'testElement'未定義

我是Django的新手，我試圖根據if語句滿足而發送不同的上下文變量。這是我的看法：Django：NameError at/approved/filter/7/- name'testElement'未定義

class FilterSearch(View): 
    template_name = 'approved/approvedElementsSEView.html' 

    def post(self,request,testPlanId): 
     elemType = request.POST.get('testElementType'); 
     elemCategory = request.POST.get('category'); 

     if(elemCategory=='routing'): 
      global testElement; 
      testElement=ApprovedTestElement.objects.filter(testElementType=elemType, routing='y'); 
      return testElement 
     elif(elemCategory=='switching'): 
      global testElement; 
      testElement = ApprovedTestElement.objects.filter(testElementType=elemType, switching='y'); 
      return testElement 


     return render(request,self.template_name,{'testElement':testElement,'testPlanId':testPlanId})

我最初得到一個UnboundLocalError：局部變量「testElement」引用之前分配，我試圖通過定義testElement作爲一個全局變量固定，現在我得到一個NameError：名字「testElement ' 沒有定義。任何幫助將不勝感激！

來源

2016-11-10 Sharanya Purushothaman Nair

如果沒有'if' /'elif'是真的會發生什麼？順便說一下，行尾的';'不是必需的，並且條件周圍的括號也不是必需的（儘管它們不影響錯誤）。 – cdarke

Global在這裏不是正確的解決方案;你不應該隨意使用它來解決名稱錯誤。你爲什麼要在if和elif裏面以及在方法結尾返回？ –

謝謝！我做了上述修改並刪除了elif，現在它可以工作。 –

類FilterSearch（查看）： TEMPLATE_NAME = '批准/ approvedElementsSEView.html'

def post(self,request,testPlanId): 
    elemType = request.POST.get('testElementType'); 
    elemCategory = request.POST.get('category'); 

    if(elemCategory=='routing'): 
     testElement = ApprovedTestElement.objects.filter(testElementType=elemType, routing='y'); 
    if(elemCategory=='switching'): 
     testElement = ApprovedTestElement.objects.filter(testElementType=elemType, switching='y'); 


    return render(request,self.template_name,{'testElement':testElement,'testPlanId':testPlanId})

來源

2016-11-10 18:32:30

上面的代碼有效！ –

You'l需要處理的幾個案例。

案例1： - 如果elemCategory未定義，該怎麼辦？

案例2： - 如果elemCategory不是'路由'或'切換'？

也許這會有所幫助。

def post(self,request,testPlanId): 
    elemType = request.POST.get('testElementType') 
    elemCategory = request.POST.get('category') 

    if elemCategory: 
     if(elemCategory=='routing'): 
      testElement = ApprovedTestElement.objects.filter(testElementType=elemType, routing='y') 
     if(elemCategory=='switching'): 
      testElement = ApprovedTestElement.objects.filter(testElementType=elemType, switching='y') 
     if not (elemCategory=='routing' or elemCategory=='switching'): 
      testElement = 'Not Found!' #You can change this to your requirement 

    else: 
     testElement = 'Not Found!' #You can change this to your requirement 

    return render(request,self.template_name,{'testElement':testElement,'testPlanId':testPlanId})

或者

def post(self,request,testPlanId): 
    elemType = request.POST.get('testElementType') 
    elemCategory = request.POST.get('category') 
    testElement = 'Not Found!' #You can change this to your requirement 

    if elemCategory: 
     if(elemCategory=='routing'): 
      testElement = ApprovedTestElement.objects.filter(testElementType=elemType, routing='y') 
     if(elemCategory=='switching'): 
      testElement = ApprovedTestElement.objects.filter(testElementType=elemType, switching='y') 

    return render(request,self.template_name,{'testElement':testElement,'testPlanId':testPlanId})

來源

2016-11-10 19:42:31

謝謝！會這樣做:) –

Django：NameError at/approved/filter/7/- name'testElement'未定義

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