Add issues collection weight to GraphQL

User not can query for aggregated weight
of issues under selection

app/graphql/types/countable_connection_type.rb

@@ -3,7 +3,7 @@
 module Types
   # rubocop: disable Graphql/AuthorizeTypes
   class CountableConnectionType < GraphQL::Types::Relay::BaseConnection
-    field :count, Integer, null: false,
+    field :count, GraphQL::INT_TYPE, null: false,
           description: 'Total count of collection'
 
     def count

app/graphql/types/issue_connection_type.rb

+# frozen_string_literal: true
+
+module Types
+  # rubocop: disable Graphql/AuthorizeTypes
+  class IssueConnectionType < CountableConnectionType
+  end
+end
+
+Types::IssueConnectionType.prepend_if_ee('::EE::Types::IssueConnectionType')

app/graphql/types/issue_type.rb

@@ -4,7 +4,7 @@ module Types
   class IssueType < BaseObject
     graphql_name 'Issue'
 
-    connection_type_class(Types::CountableConnectionType)
+    connection_type_class(Types::IssueConnectionType)
 
     implements(Types::Notes::NoteableType)
     implements(Types::CurrentUserTodos)

doc/api/graphql/reference/gitlab_schema.graphql

@@ -7036,6 +7036,11 @@ type EpicIssueConnection {
   Information to aid in pagination.
   """
   pageInfo: PageInfo!
+
+  """
+  Total weight of issues collection
+  """
+  weight: Int!
 }
 
 """
@@ -9234,6 +9239,11 @@ type IssueConnection {
   Information to aid in pagination.
   """
   pageInfo: PageInfo!
+
+  """
+  Total weight of issues collection
+  """
+  weight: Int!
 }
 
 """

doc/api/graphql/reference/gitlab_schema.json

@@ -19387,6 +19387,24 @@
               },
               "isDeprecated": false,
               "deprecationReason": null
+            },
+            {
+              "name": "weight",
+              "description": "Total weight of issues collection",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Int",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
             }
           ],
           "inputFields": null,
@@ -25159,6 +25177,24 @@
               },
               "isDeprecated": false,
               "deprecationReason": null
+            },
+            {
+              "name": "weight",
+              "description": "Total weight of issues collection",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Int",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
             }
           ],
           "inputFields": null,

ee/app/graphql/ee/types/issue_connection_type.rb

+# frozen_string_literal: true
+
+module EE
+  module Types
+    module IssueConnectionType
+      extend ActiveSupport::Concern
+
+      prepended do
+        field :weight, GraphQL::INT_TYPE, null: false, description: 'Total weight of issues collection'
+      end
+
+      def weight
+        # rubocop: disable CodeReuse/ActiveRecord
+        relation = object.items
+
+        if relation.respond_to?(:reorder)
+          relation = relation.reorder(nil)
+
+          result = relation.sum(:weight)
+
+          if relation.try(:group_values)&.present?
+            result.values.sum
+          else
+            result
+          end
+        else
+          relation.map(&:weight).compact.sum
+        end
+        # rubocop: enable CodeReuse/ActiveRecord
+      end
+    end
+  end
+end

ee/changelogs/unreleased/268222-add-issues-weight-to-graphql.yml

+---
+title: Add issues collection weight to GraphQL
+merge_request: 45415
+author:
+type: added

ee/spec/graphql/types/issue_connection_type_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GitlabSchema.types['IssueConnection'] do
+  describe '#weight' do
+    subject(:response) { GitlabSchema.execute(query, context: { current_user: current_user }) }
+
+    let(:query) do
+      %(
+          query{
+            project(fullPath:"#{project.full_path}"){
+              issues{
+                weight
+              }
+            }
+          }
+        )
+    end
+
+    let_it_be(:project) { create :project, :public }
+    let_it_be(:current_user) { create :admin }
+
+    before do
+      create :issue, project: project, weight: 2
+      create :issue, project: project, weight: 7
+      create :issue, project: project, weight: nil
+    end
+
+    it 'returns sum of all weights' do
+      expect(response.dig(*%w[data project issues weight])).to eq 9
+    end
+  end
+end

spec/graphql/types/countable_connection_type_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe GitlabSchema.types['IssueConnection'] do
+RSpec.describe GitlabSchema.types['MergeRequestConnection'] do
   it 'has the expected fields' do
     expected_fields = %i[count page_info edges nodes]