## edit.html.erb
<%=error_messages_for :user %>
<% form_for @user do |f| %>
	<p><label for="user_login">Login</label><br />
	<%=f.text_field :login %></p>
	<p><label for="user_email">Email</label><br />
	<%=f.text_field :email %></p>
	<p><label for="user_password">Password</label><br />
	<%= f.password_field :password %></p>
	<p><label for="user_password_confirmation">Confirm Password</label><br/>
	<%=f.password_field :password_confirmation %></p>
	<% if logged_in? && current_user.administrator? %>
		<p><label for="user_administrator">Administrator</label><br />
		<%= f.check_box :administrator %></p>
	<% end %>
	<p><%=submit_tag 'Update'%></p>
<% end %>

## users_controller.rb
  def update
    @user = User.find(params[:id])

    respond_to do |format|
      @user.attributes =params[:user]
      @user.administrator = params[:user][:administrator]
      if @user.save
        flash[:notice] = 'User was successfully updated.'
        format.html { redirect_to( :controller => "admin", :action => "menu") }
        format.xml { head :ok }
      else
        format.html {render :action => "edit" }
        format.xml { render :xml => @user.errors, :status => :unprocessable_entity }
      end
    end
  end