What's the best way to track usage of deprecated fields and types?

[ruudk]

I want to start logging usage of deprecated fields and types. What's the best way to do this?

My idea was to wrap all field resolvers and inspect the 4rd ResolverInfo argument.

Then log when $resolverInfo->fieldDefinition->deprecationReason is not null.

But I feel there must be a better way to do this. Any suggestions?

[spawnia]

In Lighthouse this is implemented as a validation rule - see https://github.com/nuwave/lighthouse/blob/e09943d8abc786cd266f4837ade0239fb508164c/src/Deprecation/DetectDeprecatedUsage.php

[ruudk]

Clever, this works great! Thank you.