GraphQL Ruby 2.1.1 compatibility

Fixes for a subtle change in GraphQL Ruby’s language printer and releases several recent library refactors.

Support Federation entities merging

Version 1 stable release. Adds support for a subset of the Apollo Federation specification.

More fragment and abstract handling

• Handles untyped inline fragments.
• Expands abstract types recursively through fragment selections.

Memoization and selection handling

Makes several major improvements to performance and selection handling:

• Evaluated schema types and fields are now memoized on supergraph, which dramatically improves schema mapping performance.
• Adds fragment handling to root scopes.
• Improves support for introspection types and __type accessor.

Select root locations

Allows selecting root locations for field routing. Cleans up and documents the field routing process.

Fix interface fragments

Interface types now spread fragments properly just like concrete types.

Lower GraphQL requirement, optimization

Does some general cleanup and optimization:

• GraphQL version requirement lowered to v2.0.3 (use of repeatable directives still requires v2.0.15).
• Optimized many hot planning codepaths with array passing.
• Planner extracts directive variables while planning requests.
• Additional test coverage of introspection and shareable elements.

Fix mutations, pre-shape requests

v0.2.1

Cleanup and bug fixes.

Initial stable feature set

All the major parts are included and tested. We now look to you, fellow developers, to aid in battle testing.