Fix: added productVariant service

src/services/productVariant.service.ts

@@ -0,0 +1,62 @@
+import { Repository } from 'typeorm';
+import { ProductVariant } from '../entities/ProductVariant';
+import AppDataSource from '../config/ormconfig';
+
+export class ProductVariantService {
+  private repository: Repository<ProductVariant>;
+
+  constructor() {
+    this.repository = AppDataSource.getRepository(ProductVariant);
+  }
+
+  /**
+   * Create a new ProductVariant
+   * @param data Partial data to create a ProductVariant
+   * @returns The created ProductVariant
+   */
+  async create(data: Partial<ProductVariant>): Promise<ProductVariant> {
+    const productVariant = this.repository.create(data);
+    return await this.repository.save(productVariant);
+  }
+
+  /**
+   * Retrieve all ProductVariants
+   * @returns An array of ProductVariant
+   */
+  async getAll(): Promise<ProductVariant[]> {
+    return await this.repository.find({ relations: ['product'] });
+  }
+
+  /**
+   * Retrieve a ProductVariant by its ID
+   * @param id ID of the ProductVariant
+   * @returns The ProductVariant or null if not found
+   */
+  async getById(id: number): Promise<ProductVariant | null> {
+    return await this.repository.findOne({ where: { id }, relations: ['product'] });
+  }
+
+  /**
+   * Update an existing ProductVariant
+   * @param id ID of the ProductVariant to update
+   * @param data Partial data to update the ProductVariant
+   * @returns The updated ProductVariant or null if not found
+   */
+  async update(id: number, data: Partial<ProductVariant>): Promise<ProductVariant | null> {
+    const productVariant = await this.getById(id);
+    if (!productVariant) return null;
+
+    Object.assign(productVariant, data);
+    return await this.repository.save(productVariant);
+  }
+
+  /**
+   * Delete a ProductVariant by its ID
+   * @param id ID of the ProductVariant to delete
+   * @returns True if deleted, otherwise false
+   */
+  async delete(id: number): Promise<boolean> {
+    const result = await this.repository.delete(id);
+    return result.affected === 1;
+  }
+}