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This uses GraphQL to allow the frontend to request the exact
data that is requires. We also get free caching through the Vue Apollo
plugin.

With this we can include the ability to import .graphql files in JS
and Vue files.
Also we now have the Vue test utils library to make testing
Vue components easier.

Closes #22071

1 files changed, 29 insertions, 0 deletions

diff --git a/lib/gitlab/graphql/loaders/batch_model_loader.rb b/lib/gitlab/graphql/loaders/batch_model_loader.rb
new file mode 100644
index 00000000000..5a0099dc6b1
--- /dev/null
+++ b/lib/gitlab/graphql/loaders/batch_model_loader.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Graphql
+    module Loaders
+      class BatchModelLoader
+        attr_reader :model_class, :model_id
+
+        def initialize(model_class, model_id)
+          @model_class, @model_id = model_class, model_id
+        end
+
+        # rubocop: disable CodeReuse/ActiveRecord
+        def find
+          BatchLoader.for({ model: model_class, id: model_id }).batch do |loader_info, loader|
+            per_model = loader_info.group_by { |info| info[:model] }
+            per_model.each do |model, info|
+              ids = info.map { |i| i[:id] }
+              results = model.where(id: ids)
+
+              results.each { |record| loader.call({ model: model, id: record.id }, record) }
+            end
+          end
+        end
+        # rubocop: enable CodeReuse/ActiveRecord
+      end
+    end
+  end
+end