Django field for PostgreSQL array

postgresql_fields.py

from django.db import models


class IntegerArrayField(models.Field):
    __metaclass__ = models.SubfieldBase

    def db_type(self, *args, **kwargs):
        return "integer[]"

    def get_prep_value(self, value):
        if value:
            value = map(int, value)
        return value

    def to_python(self, value):
        if value:
            value = map(int, value)
        return value