Starting with Rails 4.1, you can scope your preloaded records by passing a valid scope to ActiveRecord::Associations::Preloader. Scoping can improve performance by reducing the number of models to be instantiated and can help with certain business goals (e.g., only returning records that have not been soft deleted).
This functionality is surfaced through the preload_scope option:
PostType=GraphQL::ObjectType.definedoname'Post'field:comments, !types[!CommentType]dopreload:commentspreload_scope->(args,ctx){Comment.where(deleted_at: nil)}# Resolves with records returned from the following query:# SELECT "comments".*# FROM "comments"# WHERE "comments"."deleted_at" IS NULL# AND "comments"."post_id" IN (1, 2, 3)resolve->(obj,args,ctx){obj.comments}endend
Development
After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
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