Add custom validation functionality for the models' delete method #10244
Description
NetBox version
v3.3.1
Feature type
New functionality
Proposed functionality
NetBox's extensible custom validation is a very nice feature which allows users to inject their own business-specific logic into the models' create and update methods. I'm proposing to add the same functionality to the delete method.
Use case
Users would be able to add their own logic to ensure instantiated models are not unintentionally deleted or to better control cascading effects of a delete. One example use case would be to ensure no IP addresses are assigned to a device's or virtual machine's interfaces before deleting either the device/VM or one of its interfaces. In our deployment of NetBox we track a good bit of metadata associated with IP addresses (such as NATs, ICMP polling status, and monitoring flags) and typically assign already created IPs to interfaces rather than creating them when assigning them.
Database changes
None
External dependencies
None