在Django視圖中訪問兩個返回值

Question

我有我的表格clean方法返回兩個值。我如何區分我認爲的兩個變量。基本上，我想使用表單數據來檢查數據庫，並返回一個對象，如果它存在，以便我可以將它傳遞給新的視圖。我的目標是不打兩次數據庫，一次查看對象是否存在，另一次是檢索它以顯示給用戶。

Forms.py

class DocumentCodeLookup(forms.Form): 
    code = forms.CharField(max_length=15, error_messages={'required': 'Whoops! Please enter the Document Code from your ticket.'}) 

    def clean_code(self): 
     code = self.cleaned_data['code'].upper() 
     if (re.match(r'^[A-Z0-9]{4,8}[-][A-Z0-9]{6}$',code)): 
      code_parts = code.split('-') 

      try: 
       q = Code.objects.get(user_defined_code__name=code_parts[0], document_code=code_parts[1]) 
      except Code.DoesNotExist: 
       raise forms.ValidationError("Hmmm, we couldn't find that document.") 

      else: 
       raise forms.ValidationError("Hmmm, we couldn't find that document.") 
     return code, q 

Views.py

def index(request): 
    code_lookup_form = DocumentCodeLookup() 

    if request.method == 'POST': 
     code_lookup_form = DocumentCodeLookup(request.POST) 
     if code_lookup_form.is_valid: 
      redirect('document', x = q) # I want to pass the returned object to the view 

    return render_to_response('base/splash_page.html' ,{ 
      'code_lookup_form'  :  code_lookup_form 
    }, context_instance=RequestContext(request)) 

Answer 1

將clean_field即使這樣的工作嗎？

http://docs.djangoproject.com/en/dev/ref/forms/validation/#cleaning-a-specific-field-attribute

注的註釋。

你可以把表格放在self的表格上。

class DocumentCodeLookup(forms.Form): 
    code = forms.CharField(max_length=15, error_messages={'required': 'Whoops! Please enter the Document Code from your ticket.'}) 

    def clean_code(self): 
     code = self.cleaned_data['code'].upper() 
     if (re.match(r'^[A-Z0-9]{4,8}[-][A-Z0-9]{6}$',code)): 
      code_parts = code.split('-') 

      self.q = None 
      try: 
       self.q = Code.objects.get(user_defined_code__name=code_parts[0], document_code=code_parts[1]) 
      except Code.DoesNotExist: 
       raise forms.ValidationError("Hmmm, we couldn't find that document.") 

      else: 
       raise forms.ValidationError("Hmmm, we couldn't find that document.") 
     return code 

q在窗體上。

def index(request): 
    code_lookup_form = DocumentCodeLookup() 

    if request.method == 'POST': 
     code_lookup_form = DocumentCodeLookup(request.POST) 
     if code_lookup_form.is_valid(): 
      redirect('document', x = code_lookup_form.q) # <--- 

    return render_to_response('base/splash_page.html' ,{ 
      'code_lookup_form'  :  code_lookup_form 
    }, context_instance=RequestContext(request))