Senior & Expert RoR Developers Discussion Forum by Nyros Technologies

[sharma I]

Hi,

Recently I worked on check the availability of the username while registering into our site by using observe_field.

Steps:

In your .rhtml file add the following code.

1) signup.rhtml

<%= text_field 'user','username',:id => 'username' %>
<div style="float:left; width:70px;" id='message'> </div>

<%= observe_field(:username,
:update => "message",
:method => :get,
:frequency => 0.25,
:url => {:action => "validate"},
:with => "username" )
%>

take a partial form to display the availability message.

2) _message.rhtml

<%= @message %>

In your controller add the following method.

3) user_controller.rb

def validate
username = params[:username]
user = User.find_by_username(username)
if user
message = 'Sorry Not Available!'
else
message = 'Available'
end

@message = "<div><div>#{message}</div>"
render :partial => 'message'
end


Thank You.