use customized constance (#4191)

thirdpart/constance/backends/database/models.py

@@ -0,0 +1,24 @@
+from django.db import models
+from django.core.exceptions import ImproperlyConfigured
+
+from django.utils.translation import ugettext_lazy as _
+
+try:
+    from picklefield import PickledObjectField
+except ImportError:
+    raise ImproperlyConfigured("Couldn't find the the 3rd party app "
+                               "django-picklefield which is required for "
+                               "the constance database backend.")
+
+
+class Constance(models.Model):
+    key = models.CharField(max_length=255, unique=True, db_column='constance_key')
+    value = PickledObjectField(null=True, blank=True)
+
+    class Meta:
+        verbose_name = _('constance')
+        verbose_name_plural = _('constances')
+        db_table = 'constance_config'
+
+    def __unicode__(self):
+        return self.key