Rails - Feb 2009 - InvalidAuthenticityToken error with db sessions

I added login to my app and storing the sessions in the db. I
un-commented the "config.action_controller.session_store
:active_record_store" line in the environment.rb file, and the :secret
in the application.rb file.

Now, when I try to login I get the error InvalidAuthenticityToken.
Here''s my login form:

<% form_for :user, :url => { :action => ''do_login'' }
do |f| %>
  <p>user: <%= f.text_field :user_name %></p>
  <p>pass: <%= f.password_field :password %></p>
  <%= f.submit ''login'' %>
<% end %>


I checked the markup and the hidden field with the token appears. I''m
baffled on what keep causing this error - and would appreciate any help.
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sa 125 wrote:
> I added login to my app and storing the sessions in the db. I
> un-commented the "config.action_controller.session_store >
:active_record_store" line in the environment.rb file, and the :secret
> in the application.rb file.
> 
> Now, when I try to login I get the error InvalidAuthenticityToken.
> Here''s my login form:
> 
> <% form_for :user, :url => { :action =>
''do_login'' } do |f| %>
>   <p>user: <%= f.text_field :user_name %></p>
>   <p>pass: <%= f.password_field :password %></p>
>   <%= f.submit ''login'' %>
> <% end %>
> 
> 
> I checked the markup and the hidden field with the token appears.
I''m
> baffled on what keep causing this error - and would appreciate any help.
I should also mention that the exact error is:

ActionController::InvalidAuthenticityTokem in LoginController#do_login

--
and in the controller:

def do_login
  if request.post?
    user = User.authenticate(params[:user_name], params[:password])
    if user
      session[:user_id] = user.id
      redirect_to home_page
    else
      flash.now[:notice] = "Invalid user/password - please try again"
    end
  end
end


thanks.
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i answered to this in your other thread...
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Right, sorry. Thought it might deserve a seperate thread. Here''s the 
other post if someone wondered here looking for an answer:
http://www.ruby-forum.com/topic/179690#786710

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