How to cast an ActiveRecord object to another class when using STI?

ruby-on-rails ruby activerecord casting single-table-inheritance
fotanus picture fotanus · Aug 6, 2010 · Viewed 19.2k times · Source

I'm currently using ActiveRecord single table inheritance.

How can I cast one of my models from type A to B? They have the same parent.

Answer

Omar Qureshi picture Omar Qureshi · Aug 7, 2010

#becomes is what you are looking for:

http://api.rubyonrails.org/classes/ActiveRecord/Persistence.html#method-i-becomes

Related questions

How to drop columns using Rails migration

What's the syntax for dropping a database table column through a Rails migration?

Read More
Rails Active Record find(:all, :order => ) issue

I seem to be unable to use the ActiveRecord::Base.find option :order for more than one column at a time. For example, I have a "Show" model with date and attending columns. If I run the following code: @shows = …

Read More
How to get last N records with activerecord?

With :limit in query, I will get first N records. What is the easiest way to get last N records?

Read More