Django Python manage.py test error, error prompt:
Creating test database for alias ‘postgres’…
Got an error creating the test database: permission

Django Settings:

DBNAME = 'multi_test'
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    },
    'mysql': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': DBNAME,
        'USER': 'root',
        'PASSWORD': 'xxx',
        'HOST': '127.0.0.1',
        'PORT': 3306,
        'OPTIONS': {
            'init_command': "SET sql_mode='STRICT_TRANS_TABLES'",
        },
    },
    'postgres': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': DBNAME,
        'USER': 'root',
        'PASSWORD': 'xxx',
        'HOST': '127.0.0.1',
        'PORT': 5432,
    },
}

 

Python manager.py Migrate will work fine

Solutions:
Add createdB access to the PostgresQL database for root (the ‘USER’ corresponding to ‘Postgres’ in Settings)

wenjie@digi007:~/study/dbtest/multi_dbs$ su - postgres
Password: 
postgres@digi007:~$ psql
psql (9.6.2)
Type "help" for help.

postgres=# alter user root createdb;

will no longer report an error when you rerun test.