I am trying to use Ryan Bates 'letter-opener' gem as described in Episode #104 (and in many other places on the web) In every instance I have found, it appears that users are simply including the gem in their Gem file with the traditional ruby gems gemsource. When I attempt this, rails fails to find the gem. I must be doing something wrong, but what?
source "http://rubygems.org"
...
gem "letter-opener", group: :development
Then I type
$ bundle install
and I receive the following message:
Fetching source index for http://rubygems.org/ Could not find gem 'letter-opener (>= 0) x86-mingw32' in any of the gem sources listed in > your Gemfile.
Thanks for the help!
It's a common error to mistype a compound-word rubygem with an underscore ('_') instead of a hyphon ('-') or viceversa.
If you ever find this problem, you can go to http://rubygems.org, and search for the gem's name.
In this case, searching for letter opener returns this result, which suggests that the gem is actually called letter_opener