Module: HasRoles::UrlHelper

Defined in:
lib/has_roles/url_helper.rb

Overview

Provides helper methods for conditionally making links depending on whether the current user is authorized to access the url being linked to.

In order to determine who the "current user" is, the helper methods assume that a current_user helper has been defined. An example of an implementation of current_user could be:

class ApplicationController < ActionController::Base
  ...

  protected
    def current_user
      @current_user ||= session[:user_id] ? User.find_by_id(session[:user_id]) : nil
    end
    helper_method :current_user
end

Instance Method Summary (collapse)

Instance Method Details

Only link to the url if the current user is authorized to access it. In addition to the options normally available in link_to, the following options can be specified:

  • show_text - If set to true, will only display the text if the user is not authorized for the link. (Default is false).



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# File 'lib/has_roles/url_helper.rb', line 24

def link_to_if_authorized(name, options = {}, html_options = {}, &block)
  text_on_no_authorization = html_options.delete(:show_text) ? name : ''
  
  if authorized_for?(options)
    link_to(name, options, html_options, &block)
  else
    text_on_no_authorization
  end
end