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28 lines
526 B
Ruby
28 lines
526 B
Ruby
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class ORM
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include ActiveModel::Observing
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def save
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notify_observers :before_save
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end
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class Observer < ActiveModel::Observer
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def before_save_invocations
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@before_save_invocations ||= []
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end
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def before_save(record)
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before_save_invocations << record
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end
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end
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end
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class Widget < ORM; end
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class Budget < ORM; end
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class WidgetObserver < ORM::Observer; end
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class BudgetObserver < ORM::Observer; end
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class AuditTrail < ORM::Observer
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observe :widget, :budget
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end
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ORM.instantiate_observers
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