商店：一般购物流程

shared/db/DicShopList.ts

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+import BaseModel from './BaseModel';
+import { index, getModelForClass, prop, DocumentType, modelOptions } from '@typegoose/typegoose';
+import { ShopItem } from '../domain/dbGeneral';
+
+/**
+  * 分红记录表
+**/
+@modelOptions({ schemaOptions: { id: false } })
+@index({ shopId: 1 })
+
+export default class DicShopList extends BaseModel {
+    @prop({ required: true })
+    shopId: number;					// 商店id dic_zyz_shopList内的id
+
+    @prop({ required: true, default: false })
+    useJson: boolean;			    // 如果为true，则会随dic_zyz_shop表内商品增加而增加，items只提供顺序折扣等；为false，则只提供items里的商品
+
+    @prop({ required: true, default: [], _id: false, type: () => ShopItem })
+    items: ShopItem[];					// 商店id dic_zyz_shopList内的id
+
+    public static async findByShopId(shopId: number) {
+        const rec: DicShopListType = await DicShopListModel.findOne({ shopId }).lean();
+        return rec;
+    } 
+
+    public static async createShop(shopId: number, useJson: boolean, item: ShopItem) {
+        const rec: DicShopListType = await DicShopListModel.findOneAndUpdate({ shopId }, { useJson, $push: { items: item } }, { new: true, upsert: true }).lean();
+        return rec;
+    }
+
+}
+
+export const DicShopListModel = getModelForClass(DicShopList);
+
+export interface DicShopListType extends Pick<DocumentType<DicShopList>, keyof DicShopList>{}
+export type DicShopListParam = Partial<DicShopListType>;