CV2-6730: N+1 Query (task_response)

app/graph/loaders/first_response_loader.rb

@@ -0,0 +1,18 @@
+module Loaders
+  class FirstResponseLoader < GraphQL::Batch::Loader
+    def perform(task_ids)
+      responses = Annotation
+        .where(
+          annotated_type: 'Task',
+          annotated_id: task_ids
+        )
+        .where("annotation_type LIKE 'task_response%'")
+        .order(:created_at)
+        .group_by(&:annotated_id)
+
+      task_ids.each do |id|
+        fulfill(id, responses[id]&.first)
+      end
+    end
+  end
+end

app/graph/types/task_type.rb

@@ -16,14 +16,19 @@ def id
 
   def first_response
     obj = object.load || object
-    obj.nil? ? nil : obj.first_response_obj
+    obj.nil? ? nil : Loaders::FirstResponseLoader.for.load(obj.id)
   end
 
   field :first_response_value, GraphQL::Types::String, null: true
 
   def first_response_value
     obj = object.load || object
-    obj.nil? ? "" : obj.first_response
+    return "" if obj.nil?
+    Loaders::FirstResponseLoader.for.load(obj.id).then do |response|
+      next nil if response.nil?
+      field = response.get_fields.select{ |f| f.field_name =~ /^response/ }.first
+      field&.to_s
+    end
   end
 
   field :jsonoptions, GraphQL::Types::String, null: true