How to checkbox validation in Ruby on Rails?

Question

I’m studying ruby on Rails and little time, and one of the exercises I’m trying to do is a checkbox and a Submit button on a haml page, the goal is that the Submit button only works if the checkbox is marked, if it doesn’t just give a generic message like "Complete the fields", how can I do this?

Answer 1

Rails has a validator called acceptance_of. It is used when you have a boolean and want to check if this value is true.

class Person < ApplicationRecord
  validates :terms_of_service, acceptance: true
end

See more Rails validations on documentation.

When you call model.save, check the following:

if person.save
  # successo!
else
  # erro :(
  person.errors.full_messages
  # => [ { terms_of_service: "must be accepted" }]
end