Question

I’m doing Michael Hartl’s Rails Tutorials and am having a bit of a problem with the final stage of the Demo App, that is, running the rake command on Heroku to migrate the database to the web.

The rake command with a –trace on it gives the following result:

$ heroku run rake db:migrate --trace
Running `rake db:migrate --trace` attached to terminal...
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36: command not found: tput cols
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36: command not found: tput lines
up, run.1
(in /app)
* Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
rake aborted!
no such file to load -- pg
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `require'
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `block in require'
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:227:in `load_dependency'
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `require'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/postgresql_adapter.rb:9:in `postgresql_connection'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:230:in `new_connection'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:238:in `checkout_new_connection'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:194:in `block (2 levels) in checkout'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:190:in `loop'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:190:in `block in checkout'
/usr/local/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:189:in `checkout'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:96:in `connection'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:318:in `retrieve_connection'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:97:in `retrieve_connection'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in `connection'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/migration.rb:486:in `initialize'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/migration.rb:433:in `new'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/migration.rb:433:in `up'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/migration.rb:415:in `migrate'
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.0.1/lib/active_record/railties/databases.rake:142:in `block (2 levels) in <top (required)>'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:636:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:636:in `block in execute'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:631:in `each'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:597:in `block in invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:583:in `invoke'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in `block (2 levels) in top_level'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in `each'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in `block in top_level'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2001:in `block in run'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.8.7/bin/rake:31:in `<top (required)>'
/app/vendor/bundle/ruby/1.9.1/bin/rake:19:in `load'
/app/vendor/bundle/ruby/1.9.1/bin/rake:19:in `<main>'

I thought that that ‘command not found: tput’ stuff at the start might have been down to something I modified (it looks like the word ‘output’ that got cut off) so I redid the entire chapter from the beginning, but ended up with the same result, so I don’t think it’s any changes I made to the code.

I’m using a Windows PC, running XP. Everything worked fine when run on the localhost and my Git Repository pushed to Heroku perfectly, so everything works except for this rake command. If ye want to see any of the other files, they’re at: https://github.com/jimbobsweeney/demo_app

I’m very grateful in advance for any help on this. It’s melting my brain.

Rob

Answer 1

Do you have Cygwin installed? This article (in Japanese) mentions this error and points to this SO question which suggests you make sure Cygwin and possibly ncurses is installed. A comment there links to this article which may also have useful information.

It looks like the issue is that heroku is looking for the tput command in your shell which is not available (which I believe comes with ncurses).

As for the stack trace, it looks like the pg gem is not in your Gemfile in a place the production environment will execute it. It’s not necessary to install pg on Windows just to get the deploy working. Create a :production group in your Gemfile for this.

group :production do
  gem "pg", "~> 0.11.0"
end

You can learn more about groups in the bundler docs.