CODEWITHSUNDEEP
ruby-on-railssingle-table-inheritanceactivemodel
PlankTon
PlankTon

Reputation: 12605

Rails STI: Forbidding parent class initialization

I have a rails model Book, with STI-inherited models Fiction and NonFiction

While book holds a lot of common logic, I'd like to forbid creation of the parent Book model. Just wondering about the most elegant method for doing that in Rails - any suggestions appreciated

Upvotes: 0

Views: 511

Answers (2)

BvuRVKyUVlViVIc7
BvuRVKyUVlViVIc7

Reputation: 11811

You can set it abstract:

class Book < ActiveRecord::Base
  self.abstract_class = true
  ...
end

Upvotes: 3

Sergio Tulentsev
Sergio Tulentsev

Reputation: 230481

You could raise error in Book's initializer

class Book
  def initialize *args
    raise "Can't create a Book" if self.class == Book
    super # if it's not the Book, proceed with ActiveRecord initialization
  end
end

Upvotes: 2

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