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

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+import { Entity, Enum, Index, ManyToOne, OptionalProps, Property } from '@mikro-orm/core';
+import { Product } from 'src/modules/product/entities/product.entity';
+import { IField } from 'src/modules/order/interface/order.interface';
+import { BaseEntity } from 'src/common/entities/base.entity';
+import { Invoice } from './invoice.entity';
+
+
+@Entity({ tableName: 'invoice_items' })
+export class InvoiceItem extends BaseEntity {
+  [OptionalProps]?: 'createdAt' | 'deletedAt' | 'subTotal' | 'total';
+
+  @ManyToOne(() => Invoice)
+  invoice!: Invoice;
+
+  @ManyToOne(() => Product)
+  product!: Product;
+
+  @Property({ type: 'json', nullable: true })
+  attributes?: IField[]
+
+  @Property({ type: 'int' })
+  quantity!: number;
+
+  @Property({ type: 'int', nullable: true, })
+  unitPrice?: number;
+
+  @Property({
+    type: 'int',
+    columnType: 'int GENERATED ALWAYS AS (COALESCE(unit_price, 0) * quantity) STORED',
+    persist: false,
+    nullable: true
+  })
+  subTotal!: number;
+
+  @Property({
+    type: 'int',
+    nullable: true
+  })
+  discount?: number;
+
+  @Property({
+    type: 'int',
+    nullable: true,
+    columnType: 'int GENERATED ALWAYS AS ((COALESCE(unit_price, 0) * quantity) - COALESCE(discount, 0)) STORED',
+    persist: false
+  })
+  total!: number;
+
+  @Property({ type: 'text', nullable: true })
+  description?: string;
+
+
+  @Property({ nullable: true, columnType: 'timestamptz' })
+  confirmedAt?: Date;
+
+}