feat: Add option to allow unused types

[danilo-barboza]

Resolves #442
Resolves #420

Checklist

• Pull requests follows the contribution guide
• New or modified functionality is covered by tests

Description

Adding a new includeUnusedTypes option to include unused types to the final executable schema. The caveat is that the unused types need to be included in the schema parser dictionary. I think it is an ok tradeoff as this feature has specific use cases as described in #420 and #442.

Added a couple of test cases to it as well as serve as both test and example of how to use it.

[danilo-barboza]

Hi @vojtapol.

Can you take a look at this approach? Is it valid? What do you think?

Looking forward to getting your feedback.

[barnardb]

This looks like a straightforward way to expose the schema as written and unblock the ability to extend a type in the federation use case. Looking forward to seeing this get a maintainer review. :)

[vojtapol]

Thank you so much for the contribution. It has no impact on existing users whatsoever which is great.

[danilo-barboza]

Thank you @vojtapol for merging the PR!

What is the release process? When should we expect a new version with the changes to be released?

[sijonelis]

THis might save others some time
While this is not yet released or propagated to the graphql-spring-boot-starter package, quickest way to verify it in spring would be:

1. clone master. build it and install locally.
2. setup GraphQLSchema bean as usual
3. override the default schema parser bean as such

@Bean SchemaParser schemaParser(YourQueryService query, YourMutationService mutation) { return SchemaParser.newParser() .file(YOUR_SCHEMA_FILE) .resolvers(query, mutation) .options(SchemaParserOptions.newOptions().includeUnusedTypes(true).build()) .dictionary(YourExternalClass.class) .build(); } 

Apologies if its reads obvious to others, however it took me a while to set up a working example (danilo's test case was extremely helpful!) so i wanted to share it here.