When developing locally against a Heroku Postgres database (hosted on Heroku) you quickly realize you cannot connect due to a self-signed certificate (or rather Heroku signed certificate). The solution is to ensure that you use the non-validating SSL factory for the connection pool. This is easily done by appending “ssl=true” and “sslfactory=org.postgresql.ssl.NonValidatingFactory” to the database URL i.e. something like the following with the addition in bold:
DATABASE_URL=postgres://foo:bar@ec2-55-222-96-152.eu-west-1.compute.amazonaws.com:5432/baz?ssl=true&sslfactory=org.postgresql.ssl.NonValidatingFactory
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