annotate polls/forms.py @ 1166:130ac1e98cf4
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| author |
Brian Neal <bgneal@gmail.com> |
| date |
Sun, 20 Aug 2017 15:55:54 -0500 |
| parents |
ee87ea74d46b |
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| rev |
line source |
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gremmie@1
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1 """Forms for the Polls application."""
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2
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3 from django import forms
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4 from django.db.models import F
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5
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6 from polls.models import Choice
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7
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8
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9 class VoteForm(forms.Form):
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10 """Form for voting in a poll."""
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11 choices = forms.ModelChoiceField(label='', empty_label=None,
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12 queryset=Choice.objects.none(), widget=forms.RadioSelect)
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13
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14 def __init__(self, poll, *args, **kwargs):
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15 self.user = kwargs.pop('user', None)
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16 self.user_choice = kwargs.pop('user_choice', None)
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17 super(VoteForm, self).__init__(*args, **kwargs)
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18 self.fields['choices'].queryset = poll.choice_set.all()
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19
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20 def clean(self):
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21 if self.user_choice:
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22 raise forms.ValidationError("You've already voted in this poll!")
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23 return self.cleaned_data
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24
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25 def save(self):
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26 choice = self.cleaned_data['choices']
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27 Choice.objects.filter(id=choice.id).update(votes=F('votes') + 1)
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28 choice.voters.add(self.user)
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