Remove duplication of project_ids_without_integration

Extract common code into the Integration concern, then we can use
Project.ids_without_integration.

app/models/concerns/integration.rb

@@ -15,5 +15,19 @@ module Integration
 
       Project.where(id: custom_integration_project_ids)
     end
+
+    def ids_without_integration(integration, limit)
+      services = Service
+        .select('1')
+        .where('services.project_id = projects.id')
+        .where(type: integration.type)
+
+      Project
+        .where('NOT EXISTS (?)', services)
+        .where(pending_delete: false)
+        .where(archived: false)
+        .limit(limit)
+        .pluck(:id)
+    end
   end
 end

app/services/admin/propagate_integration_service.rb

@@ -64,7 +64,7 @@ module Admin
 
     def create_integration_for_projects_without_integration
       loop do
-        batch = Project.uncached { project_ids_without_integration }
+        batch = Project.uncached { Project.ids_without_integration(integration, BATCH_SIZE) }
 
         bulk_create_from_integration(batch) unless batch.empty?
 
@@ -114,22 +114,6 @@ module Admin
       integration.type == 'ExternalWikiService'
     end
 
-    # rubocop: disable CodeReuse/ActiveRecord
-    def project_ids_without_integration
-      services = Service
-        .select('1')
-        .where('services.project_id = projects.id')
-        .where(type: integration.type)
-
-      Project
-        .where('NOT EXISTS (?)', services)
-        .where(pending_delete: false)
-        .where(archived: false)
-        .limit(BATCH_SIZE)
-        .pluck(:id)
-    end
-    # rubocop: enable CodeReuse/ActiveRecord
-
     def service_hash
       @service_hash ||= integration.to_service_hash
         .tap { |json| json['inherit_from_id'] = integration.id }

app/services/projects/propagate_service_template.rb

@@ -26,7 +26,7 @@ module Projects
 
     def propagate_projects_with_template
       loop do
-        batch = Project.uncached { project_ids_without_integration }
+        batch = Project.uncached { Project.ids_without_integration(template, BATCH_SIZE) }
 
         bulk_create_from_template(batch) unless batch.empty?
 
@@ -50,22 +50,6 @@ module Projects
       end
     end
 
-    # rubocop: disable CodeReuse/ActiveRecord
-    def project_ids_without_integration
-      services = Service
-        .select('1')
-        .where('services.project_id = projects.id')
-        .where(type: template.type)
-
-      Project
-        .where('NOT EXISTS (?)', services)
-        .where(pending_delete: false)
-        .where(archived: false)
-        .limit(BATCH_SIZE)
-        .pluck(:id)
-    end
-    # rubocop: enable CodeReuse/ActiveRecord
-
     def bulk_insert(klass, columns, values_array)
       items_to_insert = values_array.map { |array| Hash[columns.zip(array)] }
 

spec/models/integration_spec.rb

@@ -3,8 +3,9 @@
 require 'spec_helper'
 
 RSpec.describe Integration do
-  let(:project_1) { create(:project) }
-  let(:project_2) { create(:project) }
+  let!(:project_1) { create(:project) }
+  let!(:project_2) { create(:project) }
+  let!(:project_3) { create(:project) }
   let(:instance_integration) { create(:jira_service, :instance) }
 
   before do
@@ -18,4 +19,10 @@ RSpec.describe Integration do
       expect(Project.with_custom_integration_for(instance_integration)).to contain_exactly(project_2)
     end
   end
+
+  describe '#ids_without_integration' do
+    it 'returns projects ids without an integration' do
+      expect(Project.ids_without_integration(instance_integration, 100)).to contain_exactly(project_3.id)
+    end
+  end
 end