Type geometry does not exist after CREATE EXTENSION postgis

问题

After creating new postgres db and loading necessary postgis extension

$ createdb  demodb
$ psql demodb
> CREATE EXTENSION postgis;
> CREATE EXTENSION postgis_topology;

I get django.db.utils.ProgrammingError: type "geometry" does not exist exception thrown while running django manage.py migrate

After this I tried running the failed query in pgadmin and it said the same: type "geometry" does not exist

Although appending CREATE EXTENSION postgis; before the query seems to fix this and query returned ok. But running manage.py migrate again throwed the same exception.

Isn't loading new extension permanent? And if so, how can I load it permanently, so it is loaded when running migrate?

回答1:

CREATE EXTENSION is permanent for the database you are running it in. It creates objects in a given (or the current default) schema. Per documentation:

schema_name

The name of the schema in which to install the extension's objects, given that the extension allows its contents to be relocated. The named schema must already exist. If not specified, and the extension's control file does not specify a schema either, the current default object creation schema is used.

Remember that the extension itself is not considered to be within any schema: extensions have unqualified names that must be unique database-wide. But objects belonging to the extension can be within schemas.

Check which schemas are involved in psql:

\connect mydb
\x 
\dx postgis*

The schemas used must be in your current search_path (or you'd have to schema-qualify all references).
I am not sure migrate includes additional schemas or extensions at all. Most probably, this is an issue with the search_path

回答2:

I needed to give my database user permission to access the postgis schema. I ran the following while connected to my django database and then migrate was able to run successfully.

GRANT ALL PRIVILEGES ON SCHEMA postgis TO username;