Created abstract model to take care of default values

localized_fields/models.py

@@ -0,0 +1,29 @@
+from django.db import models
+
+from .fields import LocalizedField, LocalizedValue
+
+
+class LocalizedModel(models.Model):
+    """A model that contains localized fields."""
+
+    class Meta:
+        abstract = True
+
+    def __init__(self, *args, **kwargs):
+        """Initializes a new instance of :see:LocalizedModel.
+
+        Here we set all the fields that are of :see:LocalizedField
+        to an instance of :see:LocalizedValue in case they are none
+        so that the user doesn't explicitely have to do so."""
+
+        super(LocalizedModel, self).__init__(*args, **kwargs)
+
+        for field in self._meta.get_fields():
+            if not isinstance(field, LocalizedField):
+                continue
+
+            value = getattr(self, field.name, None)
+            if not isinstance(value, LocalizedValue):
+                value = LocalizedValue()
+
+            setattr(self, field.name, value)