error display at the field is not working

I had two fields in my form i.e start and end time fields, i am
validating times but i am not reflecting the error message at the
field, what should i have to do to diplay the error as "start time
should be before end time".
please help me

validate :valid_times

def valid_times
    if start_time >= end_time
      self.errors.add :start_time, 'has to be before end time'
    end
  end

Probably your view is not checking for errors on the object. You need
code in it something like:

  <% if @widget.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@widget.errors.count, "error") %> prohibited
this widget from being saved:</h2>
      <ul>
      <% @widget.errors.full_messages.each do |msg| %>
        <li class="error"><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

Check your view (or layout) for such code, and if not there, stick
this in, substituting your model name for widget.

-Dave

Thanks for your reply, I dont want the error to dispaly at outline, i
want the error to display at near the date field i.e., inlne error
display is required for me. please help me how to get it.
Thanks in advance

Oh! Okay. That's a bit more tedious code. What you can do then is
have the errors attach to the specific fields, and check for them when
displaying each field. I think there are some standard ways to do
this, but I don't recall offhand where to find examples and
instructions. Google is your friend. IIRC, the default stuff will at
least put a red box around the specific fields, using CSS....

-Dave