add index to tables

src/modules/invoice/entities/invoice-item.entity.ts

@@ -1,4 +1,4 @@
-import { Collection, Entity, ManyToOne, OptionalProps, Property, OneToMany, Opt } from '@mikro-orm/core';
+import { Collection, Entity, ManyToOne, OptionalProps, Property, OneToMany, Opt, Index } from '@mikro-orm/core';
 import { Product } from 'src/modules/product/entities/product.entity';
 import { BaseEntity } from 'src/common/entities/base.entity';
 import { Invoice } from './invoice.entity';
@@ -6,6 +6,7 @@ import { Order } from 'src/modules/order/entities/order.entity';
 
 
 @Entity({ tableName: 'invoice_items' })
+@Index({ properties: ['invoice'] })
 export class InvoiceItem extends BaseEntity {
   [OptionalProps]?: 'createdAt' | 'deletedAt' | 'discount' | 'description' | 'confirmedAt';