即使属性在attr_accessible中，也如何批量分配Rails？

Question

In my like.rb I have:

class Like < ActiveRecord::Base
  attr_accessible :liked, :product_id, :user_id
end

In my controller I have:

@like = Product.new(:product_id => params[:id].to_i, :user_id => current_user.id, :liked => "Yes")
@like.save

However I get an error saying Can't mass-assign protected attributes: product_id, user_id, liked. Any advice on how to fix this?

Answer 1

You appear to have set the attributes as accessible on the Like model, but you're trying to mass-assign on the Product model. If you set attr_accessible there, you should find things work better.

Answer 2

@Chowlett's answer is correct. If you have fixed set of attributes to assign (like in your example), you can use without_protection flag:

@like = Product.new({product_id: params[:id].to_i, user_id: current_user.id, liked: 'Yes'}, without_protection: true)