django custom primary key field

from django.db import models

class CustomPrimaryKeyField(models.Field):
    def __init__(self, args, *kwargs):
        kwargs['primary_key'] = True
        kwargs['editable'] = False
        super().__init__(args, *kwargs)

    def db_type(self, connection):
        return 'char(32)'

    def deconstruct(self):
        name, path, args, kwargs = super().deconstruct()
        del kwargs['primary_key']
        del kwargs['editable']
        return name, path, args, kwargs


class YourModel(models.Model):
    custom_id = CustomPrimaryKeyField()
    # Other fields for your model