Question

我的表单clean方法返回两个值。如何在我的视图中区分这两个变量。基本上，我想使用表单数据来检查数据库并返回一个对象（如果它存在），以便我可以将它传递给新视图。我的目标是不要两次点击数据库，一次查看对象是否存在，另一次检索它以显示给用户。

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

clean_field会不会像那样工作？

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

注意评论。

您可以使用self将表单放在表单上。

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在表单上。

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))

在Django视图中访问两个返回的值

1 个答案: