class Athena::ORM::Events::PreFlushEventArgs
inherits Athena::ORM::Events::ManagerEventArgs

Emitted at the start of AORM::EntityManager#flush, before any changes are computed.

The event dispatcher receives it once per flush. Lifecycle callbacks annotated with AORMA::PreFlush also receive it, once for each entity the flush checks for changes: new entities about to be inserted, and managed entities that aren't read-only or scheduled for removal. Changes those callbacks make to their entity are written by the same flush.

@[AORMA::Entity]
class Article < AORM::Entity
  # ...

  @[AORMA::Column]
  property title : String = ""

  @[AORMA::PreFlush]
  def normalize_title(event : AORM::Events::PreFlushEventArgs) : Nil
    @title = @title.strip
  end
end

Warning

Calling AORM::EntityManager#flush from a listener of this event emits it again, recursing forever.