[pull] master from apollographql:master#1053
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pull[bot] merged 1 commit intostackriot:masterfrom Jan 31, 2020
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* tests: Show composition failures w/ undeclared type-system directives. > Note: This is not the solution, just a test that demonstrates the failure! Recently, the beginnings of [Executable directive] support were brought into federation through #3464 and its follow-up, #3536. The implementation of executable directives currently in place within federation requires that federated directives be declared identically across all implementing services, even if their implementation is different (or a no-op). This is working as intended! However, [Type system directives] need some additional pruning from the composed schema. Specifically, while type system directive declarations don't need to be declared identically across implementing services, their _definitions_ are currently (intentionally!) removed from the composed schema. That would be fine, but the _usages_ of those directives are currently being left in-tact, which results in validation errors within composed schemas since the directives, while still defined in the implementing services, have been removed. It's certainly important that the implementing services maintain those type system directives in order to act upon them within the services themselves, I don't believe those directives need to be preserved in the composed schema that runs at the gateway and is used to generate the query plan. This commit is mostly documenting a reproduction of an issue that was brought to my attention and introduces what I believe is a test case to build a solution against. [Type system directive]: https://graphql.github.io/graphql-spec/draft/#TypeSystemDirectiveLocation [Executable directive]: https://graphql.github.io/graphql-spec/draft/#ExecutableDirectiveLocation * Remove directives from field definition in composition * Expand functionality to all custom type system directives * Update stripping mechanism to include all TypeSystemDirectives * Jest auto-prettification of snapshots * Rename var in composition to match implementation * Add changelog entry for PR #3736 * nit: Line-length. It's bad in this file altogether, but broad re-formatting of this file won't do anything better than stomp on history. Since this line is already changing, it's worth a fix in the same commit. * Change `definition` to be a `const`-ant rather than `let`. The overall height of this block seems to be a ripe opportunity to try to lock down the re-assignment of this objects' reference, even if it wasn't introduced by this PRs intended change. * Add a comment about what `null` return does on visits. * Add a comment about why we're stripping type system directives. Co-authored-by: Jesse Rosenberger <git@jro.cc> Co-authored-by: Trevor Scheer <trevor.scheer@gmail.com>
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