Relay: [Modern] FlattenTransform: Cannot flatten fragment spread %s with arguments. Use the `ApplyFragmentArgumentTransform` before flattening

[joonhocho]

I am getting this error:
https://github.com/facebook/relay/blob/master/packages/relay-compiler/graphql-compiler/transforms/FlattenTransform.js#L160

Could someone explain how to use suggested ApplyFragmentArgumentTransform ?

I could not find any examples or documents regarding ApplyFragmentArgumentTransform.

[nikhildaga]

Facing the same issue.

[chungwong]

I am having the same issue. My use case was trying to add @relay(mask: false) onto a fragment and got an error.

ERROR:
RelayMaskTransform: Cannot unmask fragment spread `A_viewer` with arguments. Use the 'ApplyFragmentArgumentTransform' before flattening

and the query is like this

  query {
    viewer {
      ...A_viewer @relay(mask: false) @arguments(...)
    }
  }

[sibelius]

try this

...A_viewer @arguments(...) @relay(mask: false)

[chungwong]

Do you mean moving @relay(mask: false) to the end?
I tried but the error didn't go away.

[jamesone]

Did you figure this out? I am facing the same issue

[jamesone]

I've put a question up here: https://stackoverflow.com/questions/49648794/error-when-trying-to-unmask-relay-modern-fragment-that-has-arguments

Hopefully we can get to the bottom of this 💪

[jantoebes]

the only way to fix it is like

  query {
    viewer {
      A_viewer @arguments(...) {
        ...A_viewer_fragment  @relay(mask: false)
      }
    }
  }

so you can the share the properties of the viewer fragment but not the total fragment

[novito]

@jantoebes would you mind explaining that solution? I don't understand that if A is a fragmented component you can just do A_viewer without the spread? Also, later you do ...A_viewer_fragment, but what is that _fragment? Thanks

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.