Heroku上的Django无法使用不同的架构连接到Postgres

Question

I devoted today to migrating my app from my local environment to Heroku. It's been frustrating and fun at the same time, but now I'm very stuck.

I have a schema called DCPViews which I want the DB connections to default to when running queries. I've read all the relevant tutorials / posts / tips and here's where I am:

DB hierarchy

postgres (default system database) 
  -> DCP (app database) 
    -> DCP (base tables schema) 
    -> DCPViews (views layer schema) 

settings.py

import django_heroku
import dj_database_url

...

DATABASES = {}

# DATABASE_URL = 'postgres://<user>:<pass>@<host>:<port>/<db_name>?currentSchema=<schema>'
DATABASE_URL = 'postgres://' + \
                config('DB_USER') + ':' + \
                config('DB_PASSWORD') + '@' + \
                config('DB_HOST') + ':' + \
                config('DB_PORT') + '/' + \
                config('DB_NAME') + \
                '?currentSchema=' + config('DB_SCHEMA_NAME')

DATABASES['default'] = dj_database_url.config(default=DATABASE_URL, ssl_require=True)

...

# Configure Django App for Heroku
django_heroku.settings(locals())

The problem

I've tried everything to get Heroku to use the correct DATABASE_URL (with currentSchema = DCPViews ), but no luck. I don't have DB permissions to create new roles nor set a search path for Heroku's default DB user. It also won't let me export DATABASE_URL manually and doesn't seem to accept the value I pass in the settings.py file. The heroku config -s command always returns the same DATABASE_URL value.

Everything works fine in my local environment, but this is a major snag. How can I get Heroku to use the correct search_path or default to the DCPViews schema when running queries?

Update

I'm send send the DB credentials and currentSchema I want to use in my settings.py file, but Heroku seems to ignore them and overwrites them when it creates the DATABASES['default'] key. Here's the Django debug when I load a page in my browser:

DATABASES   
{'default': {'ATOMIC_REQUESTS': False,
             'AUTOCOMMIT': True,
             'CONN_MAX_AGE': 600,
             'ENGINE': 'django.db.backends.postgresql_psycopg2',
             'HOST': '<host_name>',
             'NAME': '<db_name>',
             'OPTIONS': {'sslmode': 'require'},
             'PASSWORD': '********************',
             'PORT': 5432,
             'TEST': {'CHARSET': None,
                      'COLLATION': None,
                      'MIRROR': None,
                      'NAME': None},
             'TIME_ZONE': None,
             'USER': '<user_name>'}}
DATABASE_URL    
'postgres://<user>:<pass>@<host>:<port>/<db_name>?currentSchema=<schema>'

Answer 1

I cannot comment yet, but since your settings file is using an environment file, you can just go to your heroku app in heroku.com and go to your database that is connected to your app. Then go to settings and click reveal config vars . Change your DATABASE_URL to whatever your need it to be (mind you it wil probably be just an extension off of your actual heroku postgres database url)

Answer 2

Well, I was on the right path. I added the search_path to the ROLE and that did the trick:

ALTER ROLE <role_name> SET search_path = <go, pirates>