failed models validation input don't go under field_with_errors class

Inputs for @task that fail validations, don't go under field_with_errors, no change of classes

         class Task < ActiveRecord::Base
         #VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i

         validates :title, presence:true , 
         validates :date_of_task, presence: true
         #validates :email, format: { with: VALID_EMAIL_REGEX }

         end

is there any pre configuration that should be made to start putting failed validation inputs under that class ?