Generator is not working in Rails 4

[anmolagrwl]

I tried using the gem and it showed me the error:
"Could not find generator comment."

[jackdempsey]

I just generated a new Rails 4.10 app, added it to the Gemfile, bundled and ran:

~/foobarbaz > rails g comment
create app/models/comment.rb
create db/migrate/20140729032513_create_comments.rb

[bnmrrs]

I'm getting the same issue on Rails 4.2.0

$ rails g comment
Could not find generator 'comment'. Maybe you meant 'model' or 'mailer' or 'assets'
Run `rails generate --help` for more options.

[daniely]

I just ran rails g comment on a Rails 4.2.2 project with acts_as_commentable 4.0.2 and it works fine.

$ rails g comment
create  app/models/comment.rb
create  db/migrate/20150521003238_create_comments.rb