How to add default value to a number_field in rails?

Question

I\'ve created a form

<%= form_for [current_user,@product,@bid] do |f| %>
  
<%= f.number_field :bid_amount %>
  
<%= f.n         


        

Answer 1

user740584 is right, the user should not be able to edit the product_id.

If you really do need it on your form you can use a

<%= f.hidden_field :product_id %>