forms.py
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# coding=utf-8
from django import forms
from django.utils.translation import ugettext_lazy as _
from subjects.models import Subject
from subjects.forms import ParticipantsMultipleChoiceField
from .models import StudentsGroup
class StudentsGroupForm(forms.ModelForm):
subject = None
participants = ParticipantsMultipleChoiceField(queryset = None, required = False)
def __init__(self, *args, **kwargs):
super(StudentsGroupForm, self).__init__(*args, **kwargs)
self.subject = kwargs['initial'].get('subject', None)
if self.instance.id:
self.subject = self.instance.subject
self.fields['participants'].queryset = self.subject.students.all()
def clean_name(self):
name = self.cleaned_data.get('name', '')
if self.instance.id:
same_name = self.subject.group_subject.filter(name__unaccent__iexact = name).exclude(id = self.instance.id).count()
else:
same_name = self.subject.group_subject.filter(name__unaccent__iexact = name).count()
if same_name > 0:
self._errors['name'] = [_('This subject already has a group with this name')]
return ValueError
return name
class Meta:
model = StudentsGroup
fields = ['name', 'description', 'participants']
widgets = {
'description': forms.Textarea,
'participants': forms.SelectMultiple,
}