Dynamic route generation in Rails

helper.rb

# Without the extra stuff

# Helper
class Helper
  def edit_resource_link(text, resource, &block)
    #if CanCan blah blah
      content_tag(:a, text, send(:"edit_#{resource.class.name.downcase}_path", resource), &block)
    #end
  end
end
 
# View
<%= edit_resource_link("Edit Post", @post) %>

# If authorized
# => <a href="/posts/1/edit">Edit Post</a>

# If not authorized
# =>

pseudo_helper.rb

# This does actually produce an anchor tag

class Helper
  # stubbing this as Rails provides it
  def edit_post_path(text, resource, &block)
    "/#{resource.class.name.downcase}s/1/edit"
  end

  def edit_resource_link(text, resource, &block)
    # You would use `content_tag(:a, text, send(...))`
    '<a href="' +
    send(:"edit_#{resource.class.name.downcase}_path", resource) +
    '">' + text + '</a>'
    # you may even want to extract the concatination of the _path method name to yet another helper method
  end
end

class Post; end
@post = Post.new

# You would use this here:
# <%= edit_resource_link("Edit Post", @post) %>
puts Helper.new.edit_resource_link("Edit Post", @post)

# => <a href="/posts/1/edit">Edit Post</a>

# http://apidock.com/rails/ActionView/Helpers/TagHelper/content_tag
#content_tag(:a, text, send(:"edit_#{resource.class.name.downcase}_path", resource), &block)