Expose issue contacts via GraphQL

Changelog: added

app/graphql/resolvers/issues_resolver.rb

@@ -47,7 +47,8 @@ module Resolvers
         alert_management_alert: [:alert_management_alert],
         labels: [:labels],
         assignees: [:assignees],
-        timelogs: [:timelogs]
+        timelogs: [:timelogs],
+        customer_relations_contacts: { customer_relations_contacts: [:group] }
       }
     end
 

app/graphql/types/issue_type.rb

@@ -136,6 +136,9 @@ module Types
     field :project_id, GraphQL::Types::Int, null: false, method: :project_id,
           description: 'ID of the issue project.'
 
+    field :customer_relations_contacts, Types::CustomerRelations::ContactType.connection_type, null: true,
+          description: 'Customer relations contacts of the issue.'
+
     def author
       Gitlab::Graphql::Loaders::BatchModelLoader.new(User, object.author_id).find
     end

doc/api/graphql/reference/index.md

@@ -9778,6 +9778,7 @@ Relationship between an epic and an issue.
 | <a id="epicissueconfidential"></a>`confidential` | [`Boolean!`](#boolean) | Indicates the issue is confidential. |
 | <a id="epicissuecreatenoteemail"></a>`createNoteEmail` | [`String`](#string) | User specific email address for the issue. |
 | <a id="epicissuecreatedat"></a>`createdAt` | [`Time!`](#time) | Timestamp of when the issue was created. |
+| <a id="epicissuecustomerrelationscontacts"></a>`customerRelationsContacts` | [`CustomerRelationsContactConnection`](#customerrelationscontactconnection) | Customer relations contacts of the issue. (see [Connections](#connections)) |
 | <a id="epicissuedescription"></a>`description` | [`String`](#string) | Description of the issue. |
 | <a id="epicissuedescriptionhtml"></a>`descriptionHtml` | [`String`](#string) | The GitLab Flavored Markdown rendering of `description`. |
 | <a id="epicissuedesigncollection"></a>`designCollection` | [`DesignCollection`](#designcollection) | Collection of design images associated with this issue. |
@@ -10941,6 +10942,7 @@ Returns [`VulnerabilitySeveritiesCount`](#vulnerabilityseveritiescount).
 | <a id="issueconfidential"></a>`confidential` | [`Boolean!`](#boolean) | Indicates the issue is confidential. |
 | <a id="issuecreatenoteemail"></a>`createNoteEmail` | [`String`](#string) | User specific email address for the issue. |
 | <a id="issuecreatedat"></a>`createdAt` | [`Time!`](#time) | Timestamp of when the issue was created. |
+| <a id="issuecustomerrelationscontacts"></a>`customerRelationsContacts` | [`CustomerRelationsContactConnection`](#customerrelationscontactconnection) | Customer relations contacts of the issue. (see [Connections](#connections)) |
 | <a id="issuedescription"></a>`description` | [`String`](#string) | Description of the issue. |
 | <a id="issuedescriptionhtml"></a>`descriptionHtml` | [`String`](#string) | The GitLab Flavored Markdown rendering of `description`. |
 | <a id="issuedesigncollection"></a>`designCollection` | [`DesignCollection`](#designcollection) | Collection of design images associated with this issue. |

spec/graphql/types/issue_type_spec.rb

@@ -18,7 +18,7 @@ RSpec.describe GitlabSchema.types['Issue'] do
                 confidential hidden discussion_locked upvotes downvotes merge_requests_count user_notes_count user_discussions_count web_path web_url relative_position
                 emails_disabled subscribed time_estimate total_time_spent human_time_estimate human_total_time_spent closed_at created_at updated_at task_completion_status
                 design_collection alert_management_alert severity current_user_todos moved moved_to
-                create_note_email timelogs project_id]
+                create_note_email timelogs project_id customer_relations_contacts]
 
     fields.each do |field_name|
       expect(described_class).to have_graphql_field(field_name)

spec/requests/api/graphql/project/issues_spec.rb

@@ -5,7 +5,8 @@ require 'spec_helper'
 RSpec.describe 'getting an issue list for a project' do
   include GraphqlHelpers
 
-  let_it_be(:project) { create(:project, :repository, :public) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:project) { create(:project, :repository, :public, group: group) }
   let_it_be(:current_user) { create(:user) }
   let_it_be(:issue_a, reload: true) { create(:issue, project: project, discussion_locked: true) }
   let_it_be(:issue_b, reload: true) { create(:issue, :with_alert, project: project) }
@@ -409,6 +410,35 @@ RSpec.describe 'getting an issue list for a project' do
     end
   end
 
+  context 'when fetching customer_relations_contacts' do
+    let(:fields) do
+      <<~QUERY
+      nodes {
+        id
+        customerRelationsContacts {
+          nodes {
+            firstName
+          }
+        }
+      }
+      QUERY
+    end
+
+    def clean_state_query
+      run_with_clean_state(query, context: { current_user: current_user })
+    end
+
+    it 'avoids N+1 queries' do
+      create(:contact, group_id: group.id, issues: [issue_a])
+
+      control = ActiveRecord::QueryRecorder.new(skip_cached: false) { clean_state_query }
+
+      create(:contact, group_id: group.id, issues: [issue_a])
+
+      expect { clean_state_query }.not_to exceed_all_query_limit(control)
+    end
+  end
+
   context 'when fetching labels' do
     let(:fields) do
       <<~QUERY

spec/support/database/cross-database-modification-allowlist.yml

@@ -1228,6 +1228,7 @@
 - "./spec/requests/api/commit_statuses_spec.rb"
 - "./spec/requests/api/graphql/ci/runner_spec.rb"
 - "./spec/requests/api/graphql/mutations/ci/pipeline_destroy_spec.rb"
+- "./spec/requests/api/graphql/project/issues_spec.rb"
 - "./spec/requests/api/graphql/project/merge_request_spec.rb"
 - "./spec/requests/api/graphql/project_query_spec.rb"
 - "./spec/requests/api/issues/issues_spec.rb"