No mutation operation access is allowed on remote schema for unauthenticated users after running hasura metadata apply

Version Information

Server Version: 2.6.0 CLI Version (for CLI related issue): >= 2.5.0

Environment

OSS

What is the expected behaviour?

Unauthenticated users should always be able to access mutation operation provided by the remote schema that enabled public insert/update mutation

Keywords

mutation remote schema unauthenticated users hasura metadata apply

What is the current behaviour?

After running hasura metadata apply, all public access to mutation operation on any remote schema that enabled public insert/update mutation is resulting in an error field not found in type: 'mutation_root' or mutation not exists

How to reproduce the issue?

1. Allow insert/update from unauthenticated users on a remote schema using web console
2. Export metadata to the local Hasura console
3. Reapply metadata from the local Hasura console

Any possible solutions?

Modify any permission on the same remote schema again using web console.

After comparing the metadata of remote schema before and after I did the above solution, I found the difference is the missing schema { query: Query mutation: Mutation } in the permission definition schema makes it not work.

Can you identify the location in the source code where the problem exists?

No

If the bug is confirmed, would you be willing to submit a PR?

I am not familiar with Go or Haskell

[dsandip]

@maxcan @AThilenius Re-opening this till we get more information. cc: @BenoitRanque @birlam

[Rokamaku]

I found that issue happens not only to the unauthenticated users but also all other roles