PostgreSQL Array Field (fields/array.py)

Provides a Django model field for storing PostgreSQL arrays, supporting validation and database operations.

# Source: https://github.com/django/django | License: BSD-3-Clause | Copyright Django Software Foundation and individual contributors
# Provided via justclaw.it.com; keep this notice with the code.
import json

from django.contrib.postgres import lookups
from django.contrib.postgres.forms import SimpleArrayField
from django.contrib.postgres.utils import (
    CheckPostgresInstalledMixin,
    prefix_validation_error,
)
from django.contrib.postgres.validators import ArrayMaxLengthValidator
from django.core import checks, exceptions
from django.db.models import Field, Func, IntegerField, Transform, Value
from django.db.models.fields.mixins import CheckFieldDefaultMixin
from django.db.models.lookups import Exact, In
from django.utils.translation import gettext_lazy as _

from .utils import Att

... (truncated -- full source via MCP)