Module Sequel::Plugins::AccessedColumns
In: lib/sequel/plugins/accessed_columns.rb

The accessed_columns plugin records which columns have been accessed for a model instance. This is useful if you are looking to remove other columns from being SELECTed by the dataset that retrieved the instance, which can significantly improve performance:

  a = Album[1]
  a.accessed_columns # []
  a.name
  a.accessed_columns # [:name]
  a.artist_id
  a.accessed_columns # [:name, :artist_id]

Note that this plugin should probably not be used in production, as it causes a performance hit.

Usage:

  # Make all model subclass instances record accessed columns (called before loading subclasses)
  Sequel::Model.plugin :accessed_columns

  # Make the Album instances record accessed columns
  Album.plugin :accessed_columns

Classes and Modules

Module Sequel::Plugins::AccessedColumns::InstanceMethods

[Validate]