django-select2/django_select2/db_client.py

from models import KeyMap

class Client(object):
 
    def set(self, key, value):
        """
        This method is used to set a new value
        in the db.
        """
        o = self.get(key)
        if o is None:
            o = KeyMap()
            o.key = key
            
        o.value = value
        o.save()
 
    def get(self, key):
        """
        This method is used to retrieve a value
        from the db.
        """
        try:
            return KeyMap.objects.get(key=key).value
        except KeyMap.DoesNotExist:
            return None