fix bug

app/controllers/users_controller.rb

@@ -428,7 +428,7 @@ class UsersController < ApplicationController
     
     if params[:user].present?
       
-      user_temp = User.find_by_sql("select id from users where firstname like '%#{params[:user]}%' or lastname like '%#{params[:user]}%'")
+      user_temp = User.find_by_sql("select id from users where concat(lastname,firstname) like '%#{params[:user]}%' or lastname like '%#{params[:user]}%'")
       
       if user_temp.size > 1
         activity = Activity.where('user_id in (?)', user_temp).where('user_id in (?)', watcher).order('id desc') 

app/views/users/show.html.erb

@@ -1,7 +1,17 @@
 <% if User.current.id == @user.id%>
 	<%= show_activity @state%>
 	<%= form_tag(:controller => 'users', :action => "show") do %>
-
+		<div class="user-search-block" style="float:right;margin-top:-55px">
+			<table width="100%" valign="center">
+				<tr>
+		            <td align="right">
+					<div class="project-search">
+						<%= text_field_tag 'user', params[:user], :size => 30 %>
+						<%= submit_tag l(:label_search_by_user), :class => "small", :name => nil %>	
+					</div></td>
+				</tr>
+			</table>
+		</div>
 	<% end %>
 	<% end %>
 	<% unless @state == 2%>