app/cloudfoundry_config.py

import json
import os


def extract_cloudfoundry_config():
    vcap_services = json.loads(os.environ['VCAP_SERVICES'])

    # Postgres config
    os.environ['SQLALCHEMY_DATABASE_URI'] = vcap_services['postgres'][0]['credentials']['uri'].replace('postgres',
                                                                                                       'postgresql')
    # Redis config
    if 'redis' in vcap_services:
        os.environ['REDIS_URL'] = vcap_services['redis'][0]['credentials']['uri']
Run API on Paas 2016-12-08 12:12:45 +00:00			`import json`
Run auto-correct on app/ and tests/ 2021-03-10 13:55:06 +00:00			`import os`
Run API on Paas 2016-12-08 12:12:45 +00:00

			`def extract_cloudfoundry_config():`
			`vcap_services = json.loads(os.environ['VCAP_SERVICES'])`

			`# Postgres config`
SQLAlchemy 1.4 requires SQLALCHEMY_DATABASE_URI to use `postgresql` rather than `postgres` for the connection uri to the database. When deploying to paas the database postgres environment variables are set using VCAP_SERVICES provided by PaaS. When we start up the app and set the properties we need to replace the postgres string with postgresql for the app to start up properly. This wasn't caught locally or with the unit tests because we were setting this property with postgresql. 2021-04-29 13:49:37 +01:00			`os.environ['SQLALCHEMY_DATABASE_URI'] = vcap_services['postgres'][0]['credentials']['uri'].replace('postgres',`
			`'postgresql')`
Allow REDIS_URL to optionally come from PaaS This is to support a migration from Redislabs to PaaS native Redis, allowing us to toggle between old and new using the env vars for the instance - without needing to change the code. 2022-04-12 14:48:08 +01:00			`# Redis config`
			`if 'redis' in vcap_services:`
			`os.environ['REDIS_URL'] = vcap_services['redis'][0]['credentials']['uri']`