Multi Choice Django Array Field

fields.py

from django import forms
from django.contrib.postgres.fields import ArrayField


class ChoiceArrayField(ArrayField):
    """
    A field that allows us to store an array of choices.
    
    Uses Django 1.9's postgres ArrayField
    and a MultipleChoiceField for its formfield.
    
    Usage:
        
        choices = ChoiceArrayField(models.CharField(max_length=...,
                                                    choices=(...,)),
                                   default=[...])
    """

    def formfield(self, **kwargs):
        defaults = {
            'form_class': forms.MultipleChoiceField,
            'choices': self.base_field.choices,
        }
        defaults.update(kwargs)
        # Skip our parent's formfield implementation completely as we don't
        # care for it.
        # pylint:disable=bad-super-call
        return super(ArrayField, self).formfield(**defaults)

After combining all the previous answers, below works for me, Django 4.2, Python 3.11

from django import forms
from django.contrib.postgres.fields import ArrayField


class _TypedMultipleChoiceField(forms.TypedMultipleChoiceField):
    def __init__(self, *args, **kwargs):
        kwargs.pop("base_field", None)
        kwargs.pop("max_length", None)
        super().__init__(*args, **kwargs)


class ChoiceArrayField(ArrayField):
    """
    A field that allows us to store an array of choices.

    Uses Django 4.2's postgres ArrayField
    and a TypeMultipleChoiceField for its formfield.

    Usage:

        choices = ChoiceArrayField(
            models.CharField(max_length=..., choices=(...,)), blank=[...], default=[...]
        )
    """
    def formfield(self, **kwargs):
        defaults = {
            'form_class': _TypedMultipleChoiceField,
            'choices': self.base_field.choices,
            'coerce': self.base_field.to_python,
        }
        defaults.update(kwargs)
        # Skip our parent's formfield implementation completely as we don't care for it.
        # pylint:disable=bad-super-call
        return super().formfield(**defaults)

Thanks everybody. using @anyidea 's solution. works nicely

Thanks this solution works very well