id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
28499	makemigrations fails on model with geometry field when the geo database is not the default one	Kaveh	nobody	"Create a django app with two databases defined like this:

{{{
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'whatever'
        ...
    },
    'postgres': {
        'ENGINE': 'django.contrib.gis.db.backends.postgis',
        'NAME': 'whatever'
    }
}
}}}

and here is the database router:

{{{
POSTGRES_APPS = ['app1']


class PostgresRouter(object):
    def db_for_read(self, model, **hints):
        if model._meta.app_label in POSTGRES_APPS:
            return 'postgres'
        return None

    def db_for_write(self, model, **hints):
        if model._meta.app_label in POSTGRES_APPS:
            return 'postgres'
        return None

    def allow_relation(self, obj1, obj2, **hints):
        if {obj1._meta.app_label, obj2._meta.app_label}.issubset(set(POSTGRES_APPS)):
            return True
        return None

    def allow_migrate(self, db, app_label, model_name=None, **hints):
        if db == 'postgres':
            return app_label in POSTGRES_APPS
        else:
            return app_label not in POSTGRES_APPS
}}}

Create an app called `app1` and add it to `INSTALLED_APPS`:

{{{
class Shapes(models.Model):
    shape = models.GeometryField()
}}}

Now if you run `makemigrations`, it throws the following error:
`AttributeError: 'DatabaseOperations' object has no attribute 'geo_db_type'`

Seems like the error is because Django is using the default connection, i.e. mysql, for handling the geomtry field in app1, though this app is supposed to be part of the gis enabled database, i.e. postgres.
"	Bug	closed	GIS	1.8	Normal	fixed			Unreviewed	0	0	0	0	0	0