Rails Pending Migration Errors

Append warnings or raise an exception in development mode when there are pending migrations to run.

It is inspired by this feature that made it in Rails 4.

Note: this has only been tested against Rails 3.2.13 on ruby 2.0.0p247.

Installation

Add this line to your application's Gemfile:

gem 'rails_pending_migration_errors', group: :development

And then execute:

$ bundle

If you want to raise errors on page load instead of the default warning, add this to config/environments/development.rb:

config.after_initialize do
  RailsPendingMigrationErrors.page_load = true
end