Question

So I’m working with authlogic, and I’m trying to duplicate the login functionality to the welcome page, so that you can log in by restful url or by just going to the main page. No, I don’t know if we’ll keep that feature, but I want to test it out anyway. Here’s the error message:

RuntimeError in Welcome#index
Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id

The code is below. Basically, what’s happening is the index view (the first code snippet) is sending the information from the form to the create method of user_sessions controller. At this point, in theory, it create should just pick up, but it doesn’t.

PLEASE help. Please. I’ve been doing this for about 8 hours. I checked Google. I checked IRC. I checked every book I could find. You don’t even have to answer, I can to the grunt work if you just point me in the right direction.

===EDIT EDIT EDIT===

Sameera was good enough to provide the answer to the problem. Open question, though is what the best way to organize the app is. Is applying the object @user_sessions in a before_filter acceptable, or is there a more rails-y way of doing this?

WELCOME#INDEX

<% form_for @user_session, :url => user_sessions_path do |f| %>
    <%= f.text_field :email %><br />
<%= f.password_field :password %>
<%= submit_tag 'Login' %>
<% end %>

APPLICATION CONTROLLER

class ApplicationController < ActionController::Base
  helper :all # include all helpers, all the time
  protect_from_forgery # See ActionController::RequestForgeryProtection for details
  # Scrub sensitive parameters from your log
  # filter_parameter_logging :password
    helper_method :current_user_session, :current_user
    before_filter :new_session_object
protected
    def new_session_object
        unless current_user
        @user_session = UserSession.new(params[:user_session])
    end
end
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
end<pre></code>

USER SESSIONS CONTROLLER

class UserSessionsController < ApplicationController
  def new
    @user_session = UserSession.new
  end

  def create
    @user_session = UserSession.new(params[:user_session])
    if @user_session.save
      flash[:notice] = "Logged in"
      redirect_to root_url
    else
      render :controller => 'user_sessions', :action => 'new'
    end
  end

  def destroy
    @user_session = UserSession.find
    @user_session.destroy
    flash[:notice] = "Logged out"
    redirect_to root_url
  end
end

A more detailed STACK TRACE

1: <h1>Welcome#index</h1>
2: <p>Find me in app/views/welcome/index.html.erb</p>
3: 
4: <% form_for @user_session, :url => user_sessions_path do |f| %>
5:  <%= f.text_field :email %><br />
6:      <%= f.password_field :password %>
7:  <%= submit_tag 'Login' %>

Application Trace | Framework Trace | Full Trace
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/actionpac -2.3.5/lib/action_controller/record_identifier.rb:76:in `dom_id'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/helpers/record_identification_helper.rb:16:in `dom_id'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/helpers/form_helper.rb:293:in `apply_form_for_options!'
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_view/helpers/form_helper.rb:277:in `form_for'
/Users/alex/Desktop/anglic/app/views/welcome/index.html.erb:4:in `_run_erb_app47views47welcome47index46html46erb'

Answer 1

Try this:

form_for :user_session, @user_session, :url => user_session_path(@user_session)} do |f| 

end