[Django] #31820: CheckboxSelectMultiple widget doesn't work with TextChoices enabled CharFields

[Django]

#31820: CheckboxSelectMultiple widget doesn't work with TextChoices enabled
CharFields
--------------------------------------+------------------------
               Reporter:  Remy        |          Owner:  nobody
                   Type:  Bug         |         Status:  new
              Component:  Forms       |        Version:  3.0
               Severity:  Normal      |       Keywords:
           Triage Stage:  Unreviewed  |      Has patch:  0
    Needs documentation:  0           |    Needs tests:  0
Patch needs improvement:  0           |  Easy pickings:  0
                  UI/UX:  0           |
--------------------------------------+------------------------
 # forms.py
 {{{

 class MovieForm(forms.ModelForm):

     class Meta:
         model = Movie
         fields = [
             'genres',
         ]
         widgets = {
             'genres': forms.CheckboxSelectMultiple
         }
 }}}

 # models.py
 {{{
 class Movie(models.Model):
     class Genre(models.TextChoices):
         SCIFI = 'S', 'Science Fiction'
         ACTION = 'A', 'Action'

     genres = models.charField(max_length=1, choices=Genre.choices)
 }}}

 # template
 {{{
 {{ form.genres.errors }}
 }}}

 Select one checkbox for example, then post the form. On `form.save()`, the
 following error is returned to the template:
 {{{
 "Select a valid choice. ['S'] is not one of the available choices."
 }}}

-- 
Ticket URL: <https://code.djangoproject.com/ticket/31820>
Django <https://code.djangoproject.com/>
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