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Alex Rivera
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I have shipments and invoices. invoice belongs to shipment shipment has one invoice If the shipment does have an invoice, then the shipment shouldn't be able to be deleted. I need to set this up in the models because I'm using ActiveAdmin. So I did this in shipment.rb has_one :invoice before_destroy :check_for_invoice private def check_for_invoice unless invoice.nil? self.errors[:base] << "Cannot delete shipment while its invoice exists." end end But I just get a yellow message saying "Shipment cannot be deleted" but it was in fact deleted. How can I prevent the shipment from being deleted?
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