问题
I'm attempting to launch a GeoDjango app. I've installed Postgres & PostGIS using brew on Lion. I created a database using template_postgis: createdb -T template_postgis test.
When I run python manage.py syncdb, I get the following error:
django.core.exceptions.ImproperlyConfigured: Cannot determine PostGIS version for database "test". GeoDjango requires at least PostGIS version 1.3. Was the database created from a spatial database template?
How can I track down the source of the error? I've checked that the user & pass in the config have access to the database etc.
回答1:
As a first debugging step: try to check the postgis template version manually, e.g. on the command-line connect to your database with psql test, and query with select postgis_lib_version();. This function should be defined in template_postgis and return some number. Example output:
$ psql test
psql (9.0.4)
Type "help" for help.
test=# select postgis_lib_version();
postgis_lib_version
---------------------
1.5.2
(1 row)
If an error occurs, you know the error is in the database.
回答2:
Just add in your settings.py your right version of postgis :
POSTGIS_VERSION = (2, 0, 3)
回答3:
The solution for me was to run the following in the postgres terminal:
psql database_name
database_name=# CREATE EXTENSION postgis;
If you get ERROR: relation "spatial_ref_sys" already exists, run the following before CREATE EXTENSION postgis:
drop table spatial_ref_sys;
drop table geometry_columns;
回答4:
And in case the previous select returns an error, it may be that one particular version of PostGIS was installed on that database, that you updated Postgres.app to a newer version, that bundles a newer version of PostGIS. For example, after the recent update from Postgis 2.0 to 2.1
In that case, you can make a migration after copying back some libraries, like described in this ticket
回答5:
if you are using django_debug_toolbar try to delete it or comment out debug_toolbar/utils/tracking/db.py line 152 as suggested on https://github.com/django-debug-toolbar/django-debug-toolbar/issues/442
来源：https://stackoverflow.com/questions/7491798/postgis-geodjango-cannot-determine-postgis-version-for-database