Setting up Authlogic I keep hitting: "undefined method `login' for #<UserSession: no credentials provided>"

I am trying (unsuccessfully) to setup Authlogic for my Rails3 project. In the u开发者_开发问答ser_sessions#new view, I keep getting the following error:

undefined method `login' for #<UserSession: no credentials provided>
Extracted source (around line #7):

5:   <%= form_for(:user_session, :url => user_session_path) do |f| %>
6:     <%= f.label :login %><br>
7:     <%= f.text_field :login %><br>
8:     <%= f.password_field(:password) %>   
9:     <%= f.submit %>
10:   <% end %>

I believe that the error is coming because Authlogic is failing to detect which database column should be used for the login field.

I was under the understanding that Authlogic is supposed to fall back on the :email column if no login column is present. For belt and braces I tried adding a config option to the User class but it still did not solve the problem

Here is my code:

User model

class User < ActiveRecord::Base

  attr_accessible :password, :password_confirmation
  acts_as_authentic do |c|
    c.login_field = :email
  end
end

UserSessions controller

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

  # ...
end

UserSessions#new view

<%= form_for(:user_session, :url => user_session_path) do |f| %>
  <%= f.label :login %><br>
  <%= f.text_field :login %><br>
  <%= f.password_field(:password) %>   
  <%= f.submit %>
<% end %>

UserSession model

class UserSession < Authlogic::Session::Base
   # configuration here, see documentation for sub modules of Authlogic::Session
end

DB Schema (for authlogic tables)

create_table "sessions", :force => true do |t|
  t.string   "session_id", :null => false
  t.text     "data"
  t.datetime "created_at"
  t.datetime "updated_at"
end

add_index "sessions", ["session_id"], :name => "index_sessions_on_session_id"
add_index "sessions", ["updated_at"], :name => "index_sessions_on_updated_at"

create_table "users", :force => true do |t|
  t.string   "email"
  t.datetime "created_at"
  t.datetime "updated_at"
  t.string   "first_name"
  t.string   "last_name"
  t.string   "crypted_password"
  t.string   "password_salt"
  t.string   "persistence_token"
end

Why won't Authlogic use the login column I tell it to (or is this even the problem)?

You're telling AuthLogic to use the email field, but then using the login field in your view instead. Change your view to:

<%= form_for(:user_session, :url => user_session_path) do |f| %>
  <%= f.label :email %><br>
  <%= f.text_field :email %><br>
  <%= f.password_field(:password) %>   
  <%= f.submit %>
<% end %>

and it should work.

This error can actually occur for multiple reasons. The one that affects me most often is NOT having the users table created.