Strict STI?

rubyonrails-talk
1

Is there a way to set the base class to abstract? or otherwise enforce that no one can create a "Pet"?

Pet < ActiveRecord Dog < Pet Pig < Pet

I've tried:

class Pet < ActiveRecord::Base   validates_presence_of :type end

but I get an error about ../vendor/rails/activerecord/lib/active_record/validations.rb:74: warning: Object#type is deprecated; use Object#class

2

Chris.Mohr wrote:

Is there a way to set the base class to abstract? or otherwise enforce that no one can create a "Pet"?

Pet < ActiveRecord Dog < Pet Pig < Pet

I've tried:

class Pet < ActiveRecord::Base   validates_presence_of :type end

but I get an error about ../vendor/rails/activerecord/lib/active_record/validations.rb:74: warning: Object#type is deprecated; use Object#class

>

There may be other (better) ways but the way I've done it is:

  def validate       errors.add_to_base "You can not have an item of the base class, Pet" unless self.class != Pet   end

CT

3

Chris,

Try this (untested and completely hypothetical):

class Pet < ActiveRecord::Base    elf.abstract_class = true end

Off the top of my head, I don't know what happens if you try and instantiate one of these though.

Ashley