How to transfer some variable to django form? - django

Question

I want to make a custom form field validation to check if entered string is an email of user variable. Smth like this:
class FullEmailOrPhoneForm(forms.Form):
entered_string = forms.CharField()
class Meta:
model = User
fields = ('entered_string',)
def clean_entered_string(self):
email = self.cleaned_data['entered_string']
if email == user.email: # I need user variable for this comprasion
ans = email
else:
raise ValidationError('Incorrect email')
return ans
My view:
def reset_password_with_username(request, user):
if request.method == 'POST':
form = FullEmailOrPhoneForm(request.POST)
if form.is_valid():
pass
else:
form = FullEmailOrPhoneForm()
return render(request, 'registration/password_reset_with_username.html')
So how can I transfer user variable from view to form validation function?

Answer 1

You can override the __init__() method of your form so it can receive an extra argument, the user:
# inside FullEmailOrPhoneForm
def __init__(self, user, *args, **kwargs):
self.user = user # now you can use self.user anywhere in your form
super().__init__(*args, **kwargs)
def clean_entered_string(self):
...
if self.user and email == self.user.email:
...
# inside your view you have to specify `data=` since the first init arg is now the user.
form = FullEmailOrPhoneForm(user=request.user, data=request.POST)
# or with no data
form = FullEmailOrPhoneForm(user=request.user)
Note that you created a Form, not a ModelForm, so your Meta class is completely useless. If in fact, you wanted to have a ModelForm that models the user being edited (and the user you want to pass to the form is the same user as the one being edited), you should do this using the instance of the form:
class FullEmailOrPhoneForm(forms.ModelForm): # <-- note the ModelForm here
...
class Meta:
model = User
fields = ...
def clean_entered_string(self):
...
if self.instance and email == self.instance.email:
...
# then in your view:
form = FullEmailOrPhoneForm(request.POST, instance=user)