Rails nested form error, child must exist

Question

I\'m following the tutorial: http://www.amooma.de/screencasts/2015-01-22-nested_forms-rails-4.2/

I\'m usign Rails 5.0.0.1

But when I register a hotel, it a

Answer 1

belongs_to behavior has changed in rails >= 5.x. Essentially it is now expected that the belongs_to record exists before assigning it to the other side of the association. You need to pass optional: true while declaring belongs_to in your Category model as follows:

class Category < ApplicationRecord
  belongs_to :hotel, optional: true
  validates :name, presence: true
end