django test app error - Got an error creating the test database: permission denied to create database

Question

When I try to test any app with command (I noticed it when I tried to deploy myproject using fabric, which uses this command):

python manage.py test appname
         


        

Answer 1

Wow so combining all of the answers here with a little tweaking finally got me to a working solution for docker-compose, django, and postgres...

First the postgres command given by noufal valapra is not correct (or maybe just not current), it should be:

ALTER USER docker WITH CREATEDB;

In the case of a docker-compose setup, this will go in the init.sql file, this is what mine looks like:

CREATE USER docker;
ALTER USER docker WITH CREATEDB;
CREATE DATABASE djangodb;
GRANT ALL PRIVILEGES ON DATABASE djangodb TO docker;

Then the Dockerfile for postgres looks like this:

FROM postgres:10.1-alpine
COPY init.sql /docker-entrypoint-initdb.d/

Then the Django settings.py has this entry:

if 'RDS_DB_NAME' in os.environ:
    INTERNAL_DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.postgresql_psycopg2',
            'NAME': os.environ['RDS_DB_NAME'],
            'USER': os.environ['RDS_USERNAME'],
            'PASSWORD': os.environ['RDS_PASSWORD'],
            'HOST': os.environ['RDS_HOSTNAME'],
            'PORT': os.environ['RDS_PORT'],
        }
    }

and the docker-compose looks like this:

version: '3.6'

services:

postgresdb:
  build:
    context: ./
    dockerfile: ./Dockerfile-postgresdb
  volumes:
    - postgresdata:/var/lib/postgresql/data/

django:
  build:
    context: ../
    dockerfile: ./docker/Dockerfile
  environment:
    - RDS_DB_NAME=djangodb
    - RDS_USERNAME=docker
    - RDS_PASSWORD=docker
    - RDS_HOSTNAME=postgresdb
    - RDS_PORT=5432

  stdin_open: true
  tty: true
  depends_on:
    - postgresdb

volumes:
    postgresdata: