Explain more about the FieldMasks usage about rejoiner HOT 5 CLOSED

Thanks for the question! I'm scrambling now to improve the docs.

I started this doc to explain how Rejoiner creates a FieldMask instance based on the GraphQL selectors. Currently it's only used in Projections, but something similar might work for update operations.

Let me know if you have something else in mind related to FieldMasks and GraphQL.

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@siderakis Oh great, thank you!

Can you maybe point me to a place in this codebase when that happen? I went through grpc, protobuf and this codebase and still can't say I totally understand how rejoiner leverages FieldMasks.

For once I started with a simple "FieldMask" text search in this repo :) https://github.com/google/rejoiner/search?utf8=%E2%9C%93&q=fieldmask&type=

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Woops, I didn't open source this file yet!

I'll aim at getting it released today, but it does have a tricky dependency on our internal ExecutionStrategy that I have to remove first.

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https://github.com/google/rejoiner/blob/master/rejoiner/src/main/java/com/google/api/graphql/grpc/SelectorToFieldMask.java

Example usage and tests will be released soon.

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Haha, thanks, that's what I thought. I'll wait then, thank you, great project! :-)

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