FlipperPA FlipperPA - 3 days ago 6
Python Question

Django allauth custom signup form error: 'Institution' object is not iterable

I'm probably missing something obvious here, but I'm getting the following error:

'Institution' object is not iterable


It doesn't like this line in the code:

user.institution = institution


Here's the full SignupForm class for Django allauth:

class SignupForm(forms.Form):
first_name = forms.CharField(
max_length=255,
label="Your First Name",
)
last_name = forms.CharField(
max_length=255,
label="Your Last Name",
)
institution = forms.ModelChoiceField(
label="Your Institution",
queryset=Institution.objects.all(),
empty_label="Other Institution Not Listed",
)

def signup(self, request, user):
from pprint import pprint
user.first_name = self.cleaned_data['first_name']
user.last_name = self.cleaned_data['last_name']
user.institution = self.cleaned_data['institution']

user.save()


I've checked
self.cleaned_data
and it appears to be passing the institution correctly:

{'email': 'blah@blah',
'first_name': 'John',
'institution': <Institution: Blah College>,
'last_name': 'Doe'}


I'm using a custom user model and institution is a many-to-many:

institution = models.ManyToManyField(Institution, db_index=True)


Any ideas? What am I doing wrong here?

Answer

If its a ManyToMany relationship then you need to use the add method to associate an institution with the user:

user.institution.add(self.cleaned_data['institution'])

You can read more about operations on Many-to-many relationships here.

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