Question

I keep trying to find a way to associate data with users in authlogic. I’ve tried everything I can think of but nothing seems to grab the data I’m trying to associate with it. Does anyone have an example that they can share? I’m currently trying to grab the currently associated email like this.

UserSessionsController:

  def new
    @user_session = UserSession.new
    @current_User = current_user
    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @user_session }
    end
  end

user_sessions view:

<p> <%= @current_user.email %> </p>

application controller:

helper_method :current_user

  private

  def current_user_session
    return @current_user_session if defined?(@current_user_session)
    @current_user_session = UserSession.find
  end

  def current_user
    return @current_user if defined?(@current_user)
    @current_user = current_user_session && current_user_session.record
  end

And get this error:

undefined method `email' for nil:NilClass

about:

<p> <%= @current_user.email %> </p>

Thank you in advance for any help! It’s really appreciated!

Answer 1

Make sure in the top of your ApplicationController you have

class ApplicationController
  helper_method :current_user_session, :current_user

Then, in your views, don’t use @current_user, use current_user.

<p> <%= current_user.email %> </p>

When you call @current_user in your view, it’s never been set for that request, which is why you get the nil:NilClass error.

helper_method :current_user_session, :current_user

This makes the current_user method which is already available within all of your controllers extending ApplicationController also available in your views as a helper method. By using current_user, you guarantee you’re being returned the current UserSession instance. After it’s been retrieved the first time (on the first call to current_user), @current_user will have a value, meaning

return @current_user if defined?(@current_user)

will execute, skipping the attempt to find the current UserSession instance in subsequent calls to current_user.