Question

I have Module.rb file with code

    module Finder
      module InstanceMethods
        def my_func
          @post = Post.find(params[:id])
        end
      end

      def self.included(base)
        base.send :include, InstanceMethods
        base.before_filter :my_func
      end
    end

And Controller with code

include Finder

But my app crashes with code

    undefined method `name' for nil:NilClass
    Extracted source (around line #5):

    2: 
    3: <p>
    4:   <b>Name:</b>
    5:   <%= @post.name %>
    6: </p>
    7: 
    8: <p>

It seems like @post didn’t working. Whats wrong?

Answer 1

I did it.
My module didn’t work ’cause I didn’t add line

config.autoload_paths += Dir["#{config.root}/lib/**/"] 

into application.rb file.After that, I made my task working with this code:

module Finder
  def self.included(base)
     base.class_eval do
       before_filter :my_func, :only => [:show, :edit, :update, :destroy]
     end
  end
  def my_func
       @post = Post.find(params[:id])
  end