2 posts tagged with "flow"

Relay version 13 shipped with a new Rust Compiler and requires migration to the new Flow type names. @kassens described the migration path well in this comment: https://github.com/facebook/relay/issues/3792#issuecomment-1033933397

• SomeFragment$data (instead of SomeFragment (no suffix))
• SomeFragment$fragmentType (instead of SomeFragment$ref)
• SomeQuery$variables (instead of SomeQueryVariables)
• SomeQuery$data (instead of SomeQueryResponse, as it works like the $data for fragments and isn't the full response)
• $fragmentSpreads (as a key in generated files instead of $refs)

I also asked about the new Flow types here: https://github.com/facebook/relay/issues/3717

type A = {| +readOnlyKey: string |};
type B = {| ...A, +otherKey: string |};

function test(x: B) {
  x.readOnlyKey = 'overwrite'; // no error ?
  x.otherKey = 'overwrite'; // no error ??
}

This applies to value spreads as well since they are creating a new object. It's less understandable for these type spreads where value spread is not involved.