refactor(core): Update workflowRepository.getMany to use query builder (no-changelog) (#13207)

packages/cli/test/integration/shared/db/tags.ts

@@ -2,6 +2,7 @@ import { Container } from '@n8n/di';
 import type { IWorkflowBase } from 'n8n-workflow';
 
 import type { TagEntity } from '@/databases/entities/tag-entity';
+import type { WorkflowEntity } from '@/databases/entities/workflow-entity';
 import { TagRepository } from '@/databases/repositories/tag.repository';
 import { WorkflowTagMappingRepository } from '@/databases/repositories/workflow-tag-mapping.repository';
 import { generateNanoId } from '@/databases/utils/generators';
@@ -25,3 +26,27 @@ export async function createTag(attributes: Partial<TagEntity> = {}, workflow?:
 
 	return tag;
 }
+
+export async function assignTagToWorkflow(tag: TagEntity, workflow: WorkflowEntity) {
+	const mappingRepository = Container.get(WorkflowTagMappingRepository);
+
+	// Check if mapping already exists
+	const existingMapping = await mappingRepository.findOne({
+		where: {
+			tagId: tag.id,
+			workflowId: workflow.id,
+		},
+	});
+
+	if (existingMapping) {
+		return existingMapping;
+	}
+
+	// Create new mapping
+	const mapping = mappingRepository.create({
+		tagId: tag.id,
+		workflowId: workflow.id,
+	});
+
+	return await mappingRepository.save(mapping);
+}