Validate form A's data by usuing form B's data

So I have these two forms. I would like to be able to access the data in form env_form when I am checking add_uRG for my other form. Is it possible to do this? My env form is a very common form through out my app so I would like to keep it separate instead of including it on every form.

class env_form(forms.Form):
            env = forms.ChoiceField(choices=ENV, required=True)

    class add_uRG(forms.Form):
          开发者_如何学运维  user = forms.CharField(max_length=50)
            group = forms.CharField(required=True)
            role = forms.CharField(required=True)

            def clean_user(self):
                    post_user = self.cleaned_data['user']
                    post_env = self.cleaned_data['env']
                    c = User.objects.filter(user__contains=post_user, env__contains=post_env ).count()
                    if (c == 0):
                         raise forms.ValidationError(u"User Not Found.")
                    else:
                         user_info = User.objects.filter(user__contains=post_user).values('password').distinct().count()
                         user_env = User.objects.filter(user__contains=post_user).values('env').distinct().count()
                         if not (user_env == user_info):
                            raise forms.ValidationError(u'User is using same password')
                    return(post_user)

If I'm reading your question correctly, I think that form inheritance could be used here.

class env_form(forms.Form):
    env = forms.ChoiceField(choices=ENV, required=True)

class add_uRG(env_form):
    user = forms.CharField(max_length=50)
    group = forms.CharField(required=True)
    role = forms.CharField(required=True)

    def clean_user(self):
        post_user = self.cleaned_data['user']
        post_env = self.cleaned_data['env']
        c = User.objects.filter(user__contains=post_user, env__contains=post_env ).count()
        if (c == 0):
            raise forms.ValidationError(u"User Not Found.")
        else:
            user_info = User.objects.filter(user__contains=post_user).values('password').distinct().count()
            user_env = User.objects.filter(user__contains=post_user).values('env').distinct().count()
            if not (user_env == user_info):
                raise forms.ValidationError(u'User is using same password')
        return(post_user)


    def __init__(self, *args, **kwargs):
        super(env_form, self).__init__(*args, **kwargs)

class SomeOtherForm(env_form):
    some_field = forms.CharField()

    def __init__(self,*args,**kwargs):
        super(env_form, self).__init__(*args,**kwargs)

You could assign a property on your add_uRG form after you validate the env_form, or you could pass the value to the add_uRG form as a parameter.

#forms.py
class AdduRGForm(forms.Form):
    def __init__(self, *args, **kwargs):
        super(AdduRGForm, self).__init__(*args, **kwargs)
        self.env = None

#my_view.py
def my_view(request):
    env_form = env_form(request.POST or None)

    if request.POST:
        if env_form.is_valid():
            add_uRG_form = AdduRGForm(request.POST or None)
            add_uRG_form.env = env_form.cleaned_data.get('env')
            if add_uRG_form.is_valid():
                #do something else
    return render_to_response('template.html',
        {'env_form' : env_form, 'add_uRG_form' : add_uRG_form})

I'm not exactly sure of your workflow, so if these forms don't exist in the same view, like if you're processing the env_form first, and then going to another view and needing the value someone previously selected, you could pass in the request to env_form, and set the selection in session, which you could pick up again in the second form using the method I outlined.