Ash.Error.Forbidden.Policy does not implement the AshPhoenix.FormData.Error protocol

[Schultzer]

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Versions

Erlang/OTP 28 [erts-16.2] [source] [64-bit] [smp:10:10] [ds:10:10:10] [async-threads:1] [jit]

Elixir 1.19.5 (compiled with Erlang/OTP 28)

Operating system

macOS

Current Behavior

Currently when using AshAdmin and the ActorPlug, then policy errors are unhandled when a users does not meet the policy check.

This error was unhandled because Ash.Error.Forbidden.Policy does not implement the AshPhoenix.FormData.Error protocol

Reproduction

Use the ActorPlug and have a user fail a Policy Check

Expected Behavior

AshAdmin should handle errors gracefully and notified a user if an action is forbidden.

[zachdaniel]

I'm not yet sure what the best resolution for this is in core, but you can do it manually in the meantime by defining AshPhoenix.FormData.Error protocol for that error. The AshPhoenix docs explain more on error handling 😄

[Schultzer]

Do AshAdmin not implement a fallback controller or anything that would catch this and render a proper error message based on the exception?

[zachdaniel]

AshAdmin renders errors based on the form data protocol. Do no errors appear at all? If so we can maybe add some fallback logic to check the console for errors.