Share preloads across multiple GraphQL project resolvers

Peter Hegmanrequested to merge
share-preloads-across-project-resolvers into master

What does this MR do and why?

Related to #515185 (closed)

In Migrate Your Work > Projects list to Vue and mo... (&13066 - closed) we are migrating Your work -> Projects to Vue with a GraphQL data source. This is currently behind the your_work_projects_vue feature flag which is not yet enabled. For this page we use three different GraphQL queries that hit three different resolvers:

app/graphql/resolvers/projects_resolver.rb already has some preloads setup but since the other resolvers do not extend this resolver they do not benefit from these preloads and have some N+1 issues. This MR creates a look_ahead_preloads.rb concern that can be shared across all the project resolvers so they get the same preloads.

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How to set up and validate locally

  1. Go to http://gdk.test:3000/rails/features and enable the your_work_projects_vue feature flag
  2. Go to http://gdk.test:3000/dashboard/projects
Edited by Peter Hegman

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