Postgis installation: type “geometry” does not exi

Question

I am trying to create table with Postgis. I do it by this page. But when I import postgis.sql file, I get a lot of errors:

ERROR:  type "geometry" does not exist

Does anybody know how can I fix it?

Answer 1

You can do it from terminal:

psql mydatabasename -c "CREATE EXTENSION postgis";

Answer 2

First make sure you have (matching to pg version: psql -V) postgis installed:

sudo apt install postgis postgresql-9.6-postgis-2.3

Just before tables creation add:

db.engine.execute('create extension postgis') 
db.create_all()

Answer 3

I had the same problem, but it was fixed by running following code

CREATE EXTENSION postgis;

In detail,

1. open pgAdmin
2. select (click) your database
3. click "SQL" icon on the bar
4. run "CREATE EXTENSION postgis;" code