Rails: No connection pool for ActiveRecord::Base

Question

I\'m trying to use rails 4.2.6 to develop an app. I\'m trying to use postgres for database. Server starts fine but when I try loading a page it throws this \"No connection p

Answer 1

For PostgreSQL your database.yml file should look something like that:

default: &default
  adapter: postgresql
  encoding: unicode
  # For details on connection pooling, see rails configuration guide
  # http://guides.rubyonrails.org/configuring.html#database-pooling
  pool: 5

development:
  <<: *default
  database: your_db_name

Also make sure that you have the gem installed: in your Gemfile:

gem 'pg'

Finally, restart your server.

Hope that helps

Edit: I almost forgot, make sure you have your PostgresSQL running, check this link for download and setup.