Unable to install gems in Workspace for Rails




When using Ruby on Rails workspace, I tried installing gems ‘has_scope’ or ‘simple_forms’ in the console using (as suggested in their respective github sites):

gem 'has_scope'

When I hit enter, the message displayed in the console is:

ERROR: While executing gem ... (Gem::CommandLineError) Unknown command has_scope

Does anybody know how to correctly install these gems? Thanks in advanced!


you probably missed install from the command gem install 'has_scope'