Add GraphQL resolver for groups and projects query

Peter Hegmanrequested to merge
516305-set-up-subgroups-and-projects-tab into master

What does this MR do and why?

Dependent on !202684 (merged)

Related to #516305 (closed)

We are working to migrate group and project lists to shared Vue components. This will give us consistent UX across the product and help reduce technical debit. Currently we are working on group overview in &13790 (closed). For the Subgroups and projects tab we will be using an internal REST API (/groups/foo/-/children.json) and then mapping the response to GraphQL format via a resolver. There are a few reasons for this:

  • GraphQL query with this nested structure is tricky and needs more discovery
  • We already have this endpoint so makes sense to use for now
  • By mapping to a GraphQL format we can use the shared Vue components in multiple places with different data sources

In !202982 (merged) we will use the resolver.

References

Screenshots or screen recordings

No visual changes

How to set up and validate locally

yarn jest spec/frontend/groups/show/graphql/resolvers_spec.js

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Edited by Peter Hegman

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