Couldn't find User without an ID

users_controller :--

def show
  @user = User.find(params[:id])
  end

show.html.erb :--

<h1>Showing user</h1>
<p><th>Name</th>: <%=h @user.name%></p>
<p><th>Role</th>: <%=h @user.role%></p>
<p><th>Password</th>: <%=h @user.password%></p>
<p><th>Confirmation Password</th>: <%=h @user.confirmation_password%></

<%= link_to 'Back', :action =>'list' %>

Error :
ActiveRecord::RecordNotFound in UsersController#show

Couldn't find User without an ID
Please help it must help full for edti.html.erb

Note that the error is in UsersController#show so it is nothing to do
with show.html.erb as it has not got there yet. Since all you are
doing in show is finding a record by id and the error says that the
record was not found it seems likely that the error is with
params[:id]. Have a look in development.log and see what parameters
are being passed to show.

Colin

Processing UsersController#show (for 127.0.0.1 at 2010-02-28 18:58:49) [GET]
  Session ID: BAh7BiIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNo
SGFzaHsABjoKQHVzZWR7AA==--56987cc63590eb878c021fb10e6d0bdf10f5b4f4
  Parameters: {"action"=>"show", "controller"=>"users"}

ActiveRecord::RecordNotFound (Couldn't find User without an ID):
    E:/Rails_instanT/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.2/lib/active_record/base.rb:1364:in
`find_from_ids'
    E:/Rails_instanT/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.2/lib/active_record/base.rb:541:in
`find'
    /app/controllers/users_controller.rb:3:in `show'

Processing UsersController#show (for 127.0.0.1 at 2010-02-28 18:58:49) [GET]
Session ID: BAh7BiIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNo
SGFzaHsABjoKQHVzZWR7AA==--56987cc63590eb878c021fb10e6d0bdf10f5b4f4
Parameters: {"action"=>"show", "controller"=>"users"}

Can you not see the problem? There is no id in the parameters.
Given that it is not surprising that User.find(params[:id]) fails
saying that there is no id.

Colin