When you invoke destroy
or destroy_all
on an ActiveRecord
object, the ActiveRecord
'destruction' process is initiated, it analyzes the class you're deleting, it determines what it should do for dependencies, runs through validations, etc.
When you invoke delete
or delete_all
on an object, ActiveRecord
merely tries to run the DELETE FROM tablename WHERE conditions
query against the db, performing no other ActiveRecord
-level tasks.