Merge pull request rails#41992 from ashiksp/update-sti-abbreviation

[ci skip]Updated abbreviation for single table inheritance.

Author: kamipo

activerecord/lib/active_record/persistence.rb

@@ -584,17 +584,17 @@ def destroy!
     end
 
     # Returns an instance of the specified +klass+ with the attributes of the
-    # current record. This is mostly useful in relation to single-table
-    # inheritance structures where you want a subclass to appear as the
+    # current record. This is mostly useful in relation to single table
+    # inheritance (STI) structures where you want a subclass to appear as the
     # superclass. This can be used along with record identification in
     # Action Pack to allow, say, <tt>Client < Company</tt> to do something
     # like render <tt>partial: @client.becomes(Company)</tt> to render that
     # instance using the companies/company partial instead of clients/client.
     #
     # Note: The new instance will share a link to the same attributes as the original class.
-    # Therefore the sti column value will still be the same.
+    # Therefore the STI column value will still be the same.
     # Any change to the attributes on either instance will affect both instances.
-    # If you want to change the sti column as well, use #becomes! instead.
+    # If you want to change the STI column as well, use #becomes! instead.
     def becomes(klass)
       became = klass.allocate
 
@@ -609,11 +609,11 @@ def becomes(klass)
       became
     end
 
-    # Wrapper around #becomes that also changes the instance's sti column value.
+    # Wrapper around #becomes that also changes the instance's STI column value.
     # This is especially useful if you want to persist the changed class in your
     # database.
     #
-    # Note: The old instance's sti column value will be changed too, as both objects
+    # Note: The old instance's STI column value will be changed too, as both objects
     # share the same set of attributes.
     def becomes!(klass)
       became = becomes(klass)

activerecord/test/activejob/destroy_association_async_test.rb

@@ -162,7 +162,7 @@ class DestroyAssociationAsyncTest < ActiveRecord::TestCase
     BookDestroyAsync.delete_all
   end
 
-  test "has_many with sti parent class destroys all children class records" do
+  test "has_many with STI parent class destroys all children class records" do
     book = BookDestroyAsync.create!
     LongEssayDestroyAsync.create!(book: book)
     ShortEssayDestroyAsync.create!(book: book)