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# frozen-string-literal: true
module Sequel
module Plugins
# The columns_updated plugin stores the columns hash used in the
# UPDATE query when saving the instance, and makes it available
# in the after_update and after_save hooks via the +columns_updated+
# accessor. The data is cleared before returning from +save+.
#
# Usage:
#
# # Make all model subclasses store the columns hash used for updating
# Sequel::Model.plugin :columns_updated
#
# # Make the Album class store the columns hash used for updating
# Album.plugin :columns_updated
module ColumnsUpdated
module InstanceMethods
private
# The hash used for updating records. This should only be called
# in the after_update and after_save hooks.
attr_reader :columns_updated
# Store the hash used for updating the record, so it can be accessed
# in the after_hooks.
def _update_columns(columns_updated)
@columns_updated = columns_updated
super
end
# Unset the updated columns hash before returning from save.
def _save(opts)
super
ensure
@columns_updated = nil
end
end
end
end
end
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