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-rw-r--r--activerecord/lib/active_record/persistence.rb6
1 files changed, 4 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb
index ae1c326d95..04ee892eba 100644
--- a/activerecord/lib/active_record/persistence.rb
+++ b/activerecord/lib/active_record/persistence.rb
@@ -204,8 +204,10 @@ module ActiveRecord
# 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.
- # So any change to the attributes in either instance will affect the other.
+ # Note: The new instance will share a link to the same attributes as the original class
+ # therefore sti column value will be same with the original object.
+ # If you want sti column to be changed, use +becomes!+ instead.
+ # Any change to the attributes in either instance will affect the other.
def becomes(klass)
became = klass.new
became.instance_variable_set("@attributes", @attributes)