使用PostgreSQL 9.3运行Django单元测试，这甚至可能吗？

Question

Running unittests with Django 1.7 on sqlite is a no brainer. Couple of config lines and you are good to go. With Postgres, it almost seems impossible.

I create the test database, set the owner of the DB and the Schema to the user testing, grant all on database to testing and we should be good to go right? BUT NO!

postgres=# create user testing with password '*****';
postgres=# create database project_test;
postgres=# grant all on database project_test to testing;
postgres=# alter database project_test owner to testing;
postgres=# \c project_test;
postgres=# alter schema public owner to testing;

(project) $python manage.py test
Creating test database for alias 'default'...
Got an error creating the test database: permission denied to create database

Type 'yes' if you would like to try deleting the test database 'project_test', or 'no' to cancel: yes
Destroying old test database 'default'...
Got an error recreating the test database: permission denied to create database

postgres=# grant create on tablespace pg_default to testing;

brings me back around to

Type 'yes' if you would like to try deleting the test database 'project_test', or 'no' to cancel: yes
Destroying old test database 'default'...
Got an error recreating the test database: database "project_test" does not exist

It seems django's desire to drop the database puts a spanner in the works.

I have a script to wipe the db and recreate the structure that looks like this

set -e
python manage.py dbshell <<EOF
DROP SCHEMA public CASCADE;
CREATE SCHEMA public;
EOF

This works just fine. I know best practices are to test on the same engine you run in production, but everywhere I look all the testing is being done on sqlite which won't work for me because I'm now using a citext column and want to test the behavior of the code with that column type.

How do I get to the point I can test with postgres?

Answer 1

I have a setup like the one you are talking about in your question.

DATABASES = {
'default': {
    #'ENGINE': 'django.db.backends.postgresql_psycopg2',
    'ENGINE': 'django.contrib.gis.db.backends.postgis',
    'NAME': '#####',
    'USER': '#####',
    'PASSWORD': DJANGO_DB_PASSWORD

this uses the postgres database in testing, but, you need to remember that it only uses the schema, you cannot run unit tests using real database values.

I did have to create the database in postgres for it to work.

Not sure if this will help you.