Merge pull request rspec#2751 from glaucocustodio/avoid-crash-in-rails-generators

Document/suggest workaround to avoid crash when running rails generators

Author: JonRowe

lib/generators/rspec/install/templates/spec/rails_helper.rb

@@ -4,6 +4,11 @@
 require_relative '../config/environment'
 # Prevent database truncation if the environment is production
 abort("The Rails environment is running in production mode!") if Rails.env.production?
+<% if RSpec::Rails::FeatureCheck.has_active_record_migration? -%>
+# Uncomment the line below in case you have `--require rails_helper` in the `.rspec` file
+# that will avoid rails generators crashing because migrations haven't been run yet
+# return unless Rails.env.test?
+<% end -%>
 require 'rspec/rails'
 # Add additional requires below this line. Rails is not loaded until this point!