Module doesn't define an attribute/class

Question

I want to write a multi-table application on Django, so I created two databases, one of them to use by default, other - "map" to use by specific app - "map".

map/models.py:

from django.db import models
class MapRouter(object):
   def db_for_read(self, model, **hints):
               if model._meta.app_label == 'map':
                       return 'map'
               return None
   def db_for_write(self, model, **hints): 
               if model._meta.app_label == 'map':
                       return 'map'
               return None
   def allow_relation(self, obj1, obj2, **hints):
               if obj1._meta.app_label == 'map' or \
                  obj2._meta.app_label == 'map':
                  return True
               return None
   def allow_migrate(self, db, model):
               if db == 'map':
                       return model._meta.app_label == 'map'
               elif model._meta.app_label == 'map':
                       return False
               return None

settings.py:

DATABASES = {
   'default': {
       'ENGINE': 'django.db.backends.postgresql_psycopg2',
       'NAME': 'eventmap',
       'USER': 'eventmap',
       'PASSWORD': 'eventmap',
       'HOST': 'localhost',
       'PORT': '',
   },
   'map': {
       'ENGINE': 'django.db.backends.postgresql_psycopg2',
       'NAME': 'map',
       'USER': 'eventmap',
       'PASSWORD': 'eventmap',
       'HOST': 'localhost',
       'PORT': '',
   }
}
DATABASE_ROUTERS = ['map.MapRouter']

The problem is when I run python manage.py syncdb it says:

django.core.exceptions.ImproperlyConfigured: Module "map" does not define a "MapRouter" attribute/class

What's wrong with it?

I don't know django well enough, but "map" is a builtin function. I suspect its imported rather than the module you want. Don't name modules after built in functions! — tdelaney
– tdelaney, Commented Sep 19, 2014 at 15:47
I've changed this name to "mymap", but still have this exception( — adjstts
– adjstts, Commented Sep 19, 2014 at 15:53
In the mymap directory, do you have a __init__.py and does it from models import MapRouter? Maybe there is other django magic, but map.MapRouter doesn't exist unless your __init__.py makes it so. — tdelaney
– tdelaney, Commented Sep 19, 2014 at 16:00
Yes, it have that file and all other files that are common for django apps — adjstts
– adjstts, Commented Sep 19, 2014 at 16:03

Daniel Roseman · Accepted Answer · 2014-09-19 16:21:31Z

5

You need to put the full path to your router in the setting.

DATABASE_ROUTERS = ['map.models.MapRouter']

answered Sep 19, 2014 at 16:21

Daniel Roseman

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