Question

I have one model but two different forms ,one form i am saving through create action and another one through student_create action.I want to validate a field in student_create action form and leave other one free.How do i do it?Any help will be appreciated

 class BookController < ApplicationController
     def create
      if @book.save
     redirect_to @book    #eliminated some of the code for simplicity
      end 
     end

     def student_create
     if @book.save            #eliminated some of the code for simplicity
      redirect_to @book
     end
     end

I have tried this but it didnt work

      class Book < ActiveRecord::Base
        validates_presence_of :town ,:if=>:student?

    def student?
    :action=="student_create"
    end
    end

Also this didnt work

      class Book < ActiveRecord::Base
        validates_presence_of :town ,:on=>:student_create
       end

Answer 1

I was able to acomplish it what i wanted to do by giving it an option :allow_nil=>true