# Source code for django_celery_results.models

    """Database models."""
    from __future__ import absolute_import, unicode_literals

    from django.db import models
    from django.utils.translation import ugettext_lazy as _

    from celery import states
    from celery.five import python_2_unicode_compatible

    from . import managers

    ALL_STATES = sorted(states.ALL_STATES)
    TASK_STATE_CHOICES = sorted(zip(ALL_STATES, ALL_STATES))

    @python_2_unicode_compatible
    class TaskResult(models.Model):
        """Task result/status."""

        task_id = models.CharField(
            _('task id'),
            max_length=255, unique=True,
        )
        status = models.CharField(
            _('state'),
            max_length=50, default=states.PENDING,
            choices=TASK_STATE_CHOICES,
        )
        content_type = models.CharField(
            _('content type'), max_length=128,
        )
        content_encoding = models.CharField(
            _('content encoding'), max_length=64,
        )
        result = models.TextField(null=True, default=None, editable=False)
        date_done = models.DateTimeField(_('done at'), auto_now=True)
        traceback = models.TextField(_('traceback'), blank=True, null=True)
        hidden = models.BooleanField(editable=False, default=False, db_index=True)
        meta = models.TextField(null=True, default=None, editable=False)

        objects = managers.TaskResultManager()

        class Meta:
            """Table information."""

            verbose_name = _('task result')
            verbose_name_plural = _('task results')

        def as_dict(self):
            return {
                'task_id': self.task_id,
                'status': self.status,
                'result': self.result,
                'date_done': self.date_done,
                'traceback': self.traceback,
                'meta': self.meta,
            }

        def __str__(self):
            return '<Task: {0.task_id} ({0.status})>'.format(self)