Source code for superdjango.db.default.managers

# Imports

from django.core.exceptions import ObjectDoesNotExist
from django.db import models

# Exports

__all__ = (
    "DefaultManager",
)


# Managers


class DefaultManager(models.Manager):
    """Supports the ``DefaultModel``.

    .. code-block:: py

        from superdjango.db.default.managers import DefaultManager
        from superdjango.db.default.models import DefaultModel

        class Currency(DefaultModel):
            code = models.CharField(max_length=4)
            name = models.CharField(max_length=64)

        default_currency = Currency.objects.default()

    """

    def default(self):
        """Get the default record."""
        try:
            return self.get_queryset().get(is_default=True)
        except ObjectDoesNotExist:
            return None