Question

This question was asked before here, but can’t say that the answer helps me. I am using Rails 3.1.3. When I run rails console on my local dev machine, I get the following message:

no such file to load -- map_by_method

The message doesn’t prevent the irb session from launching, so it’s benign. But I’d like to get rid of it. At one point in time I had the map_by_method gem installed, but I removed it from the Gemfile and gemset — yet the message still appears. Any idea how to vanquish it?

Answer 1

there might be some causes for this:

1. there might be some other gem which has it as a dependency
2. you might have a require ‘map_by_method’ in your code
3. you might have a require in your .irbrc

the .irbrc can be located in your user home or in the current working directory.
have a look at an example .irbrc here: http://matthewhutchinson.net/2010/9/19/rails-3-bash-aliases-and-irbrc-configs