Rails - Oct 2005 - validation in controller makes loss of selected values

A simple use case;

A page has two drop down values; age_from & age_to

If age_to is lesser than age_from , I need to show an error message to the
user and go back to the form. When I go back to the form the values selected
by the user is lost.

How should I handle this case so that the values entered by the user is not
lost? The controller is given below

class SearchController < ApplicationController

def show
end

def search
age_from = params[:search][:age_from]
age_to = params[:search][:age_to]
if age_from > age_to
#validation message to the user
render :action => ''show''
end
end

end


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Hi !

2005/10/20, Neeraj Kumar <neeraj.jsr@gmail.com>:
>  class SearchController < ApplicationController
>
>    def show
>    end
>
>    def search
>      age_from    =    params[:search][:age_from]
>      age_to      =    params[:search][:age_to]
>      if age_from > age_to
>        #validation message to the user
>        render :action => 'show'
>      end
>    end
>
>  end
Replace the local variables with instance ones, and use that in the view:
@age_from = params[:search][:age_form]

(view):
<%= text_field :search, :age_from, :value => @age_from %>

NOTE: Your validation as written can be fooled - you don't even know
if you've received valid numbers.  You should do @age_from
Integer(params[:search][:age_from]), and catch any resulting
exception.

Hope that helps !
François

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