graphql-engine/server/src-lib/Hasura/GraphQL
Antoine Leblanc 3a400fab3d Rewrite OpenAPI
### Description

This PR rewrites OpenAPI to be more idiomatic. Some noteworthy changes:
- we accumulate all required information during the Analyze phase, to avoid having to do a single lookup in the schema cache during the OpenAPI generation phase (we now only need the schema cache as input to run the analysis)
- we no longer build intermediary endpoint information and aggregate it, we directly build the the `PathItem` for each endpoint; additionally, that means we no longer have to assume that different methods have the same metadata
- we no longer have to first declare types, then craft references: we do everything in one step
- we now properly deal with nullability by treating "typeName" and "typeName!" as different
- we add a bunch of additional fields in the generated "schema", such as title
- we do now support enum values in both input and output positions
- checking whether the request body is required is now performed on the fly rather than by introspecting the generated schema
- the methods in the file are sorted by topic

### Controversial point

However, this PR creates some additional complexity, that we might not want to keep. The main complexity is _knot-tying_: to avoid lookups when generating the OpenAPI, it builds an actual graph of input types, which means that we need something similar to (but simpler than) `MonadSchema`, to avoid infinite recursions when analyzing the input types of a query. To do this, this PR introduces `CircularT`, a lesser `SchemaT` that aims at avoiding ever having to reinvent this particular wheel ever again.

### Remaining work

- [x] fix existing tests (they are all failing due to some of the schema changes)
- [ ] add tests to cover the new features:
  - [x] tests for `CircularT`
  - [ ] tests for enums in output schemas
- [x] extract / document `CircularT` if we wish to keep it
- [x] add more comments to `OpenAPI`
- [x] have a second look at `buildVariableSchema`
- [x] fix all missing diagnostics in `Analyze`
- [x] add a Changelog entry?

PR-URL: https://github.com/hasura/graphql-engine-mono/pull/4654
Co-authored-by: David Overton <7734777+dmoverton@users.noreply.github.com>
GitOrigin-RevId: f4a9191f22dfcc1dccefd6a52f5c586b6ad17172
2022-06-30 12:57:09 +00:00
..
Execute Rewrite OpenAPI 2022-06-30 12:57:09 +00:00
Parser server: Metadata origin for definitions (type parameter version v2) 2022-06-28 15:53:44 +00:00
Schema Move postgres specific schema into the Postgres namespace 2022-06-29 16:05:35 +00:00
Transport server: GHC 9.2 changes compatible with 8.10 (#3550) 2022-06-25 22:09:05 +00:00
Analyse.hs Rewrite OpenAPI 2022-06-30 12:57:09 +00:00
Context.hs server: runParse returns QErr 2022-06-16 12:22:30 +00:00
Execute.hs server: runParse returns QErr 2022-06-16 12:22:30 +00:00
Explain.hs server: runParse returns QErr 2022-06-16 12:22:30 +00:00
Logging.hs Source typename customization (close graphql-engine#6974) 2021-10-29 14:43:14 +00:00
Namespace.hs server: Metadata origin for definitions (type parameter version v2) 2022-06-28 15:53:44 +00:00
ParameterizedQueryHash.hs server: migrate to aeson-2 in preparation for ghc 9.2 upgrade 2022-06-08 15:32:27 +00:00
Parser.hs server: Metadata origin for definitions (type parameter version v2) 2022-06-28 15:53:44 +00:00
RemoteServer.hs Remove the source cache from the schema context 2022-06-23 11:43:17 +00:00
Schema.hs server: Metadata origin for definitions (type parameter version v2) 2022-06-28 15:53:44 +00:00