Rails: NoMethodError only

Question

I am on the 12th hour of programming, so I might have missed something simple, but any suggestions on this issue?

in my app_helper i added a module for redcarpet filter with haml

module Haml::Filters::Redcarpet include Haml::Filters::Base include ActionView::Helpers::TagHelper def render(text) options = [:autolink, :smart, :hard_wrap, :no_intraemphasis] content_tag(:div, Redcarpet.new(text.to_s, *options).to_html.html_safe, :class => "markup" ) end end 

works great in development. but in production he throws

 [ !EXCEPTION! ] NoMethodError: undefined method 'content_tag' for Haml::Filters::Redcarpet:Module 

why was that? or what can i check? I even ran the console in production and was able to turn on TagHelper and use these methods. puzzled ...

Answer 1

I assume that you have different versions of one or more gems in your production box from your dev environment. Make a “gem list” in both and add the results to the original message.

The best way to avoid this problem is to use the Ruby Version Manager (RVM) and the gem “bundler”: you can create a gemset specific to your project, and thus make sure that the gems are the same for both versions (prod and dev) of the project .

rvm: https://rvm.io

bundler: http://gembundler.com/

Oh - and if you look down at your stack trace, you will probably see a link to the gem that sets the haml / redcarpet material, it is probably a criminal, that is, it has a different version.