ChainedModelChoiceField does't honor label_from_instance

[eduardocesar]

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All versions of django-smart-selects prior to version 1.2.8 are vulnerable to an XSS attack as detailed in issue 171. As a result, all previous versions have been removed from PyPI to prevent users from installing insecure versions. All users are urged to upgrade as soon as possible.

Checklist

^{Put an x in the bracket when you have completed each task, like this: [x]}

• [x] This issue is not about installing previous versions of django-smart-selects older than 1.2.8. I understand that previous versions are insecure and will not receive any support whatsoever.
• [x] I have verified that that issue exists against the master branch of django-smart-selects.
• [x] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• [x] I have debugged the issue to the smart_selects app.
• [x] I have reduced the issue to the simplest possible case.
• [x] I have included all relevant sections of models.py, forms.py, and views.py with problems.
• [x] I have used GitHub Flavored Markdown to style all of my posted code.

Steps to reproduce

1. Subclass ChainedModelChoiceField
2. define label_from_instance and return any value

Actual behavior

After defining label_from_instance, the rendered value doesn't show

Expected behavior

The returned value from label_from_instance should be rendered

Relevant Django docs section: https://docs.djangoproject.com/en/1.11/ref/forms/fields/#modelchoicefield

forms.py

class ModifiedModelChoiceField(forms.ModelChoiceField):
    # Works
    def label_from_instance(self, obj):
        return obj.name + ' test'

class ModifiedChainedModelChoiceField(ChainedModelChoiceField):
    # Doesn't work.
    def label_from_instance(self, obj):
        return obj.name + ' test'

class NatalForm(forms.Form):
    nome = forms.CharField(max_length=150)
    continent = forms.ChoiceField(label="Continente", choices=CONTINENT_CHOICES)
    country = ModifiedChainedModelChoiceField(
        queryset=Country.objects.all(),
        empty_label='escolha o país',
        label='País',

        to_app_name='cities_light', to_model_name='Country', chained_field='continent', chained_model_field='continent',
        foreign_key_app_name='openastro', foreign_key_model_name='Location', foreign_key_field_name='country',
        show_all=False, auto_choose=True,
    )

    region = ChainedModelChoiceField(
        #queryset=Region.objects.all(),
        empty_label='escolha o estado',
        label='Estado',

        to_app_name='cities_light', to_model_name='Region', chained_field='country', chained_model_field='country',
        foreign_key_app_name='openastro', foreign_key_model_name='Location', foreign_key_field_name='region',
        show_all=False, auto_choose=True,
    )

    city = ChainedModelChoiceField(
        #queryset=City.objects.all(),
        empty_label='escolha a cidade',
        label='Cidade',

        to_app_name='cities_light', to_model_name='City', chained_field='region', chained_model_field='region',
        foreign_key_app_name='openastro', foreign_key_model_name='Location', foreign_key_field_name='city',
        show_all=False, auto_choose=True,
    )

models.py

@python_2_unicode_compatible
class Location(models.Model):
    continent = models.CharField(max_length=2, choices=CONTINENT_CHOICES)
    country = ChainedForeignKey(
        Country,
        chained_field="continent",
        chained_model_field="continent",
        show_all=False,
        auto_choose=True,
        sort=True)

    region = ChainedForeignKey(
        Region,
        chained_field="country",
        chained_model_field="country",
        show_all=False,
        auto_choose=True,
        sort=True)

    city = ChainedForeignKey(
        City,
        chained_field="region",
        chained_model_field="region",
        show_all=False,
        auto_choose=True,
        sort=True)

    def __str__(self):
        return str(self.city)

[manelclos]

@eduardocesar can you reproduce with latest master version?

[manelclos]

@eduardocesar I can confirm this problem, but when trying to fix it I found it is not a one-liner, so this would have to wait until a major release.

[Gigiarum]

Resolution news?