抽卡：添加抽卡接口

shared/db/UserGachaRec.ts

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+import BaseModel from './BaseModel';
+import { index, getModelForClass, prop, DocumentType, modelOptions } from '@typegoose/typegoose';
+import { GachaResult } from '../domain/activityField/gachaField';
+import { genCode } from '../pubUtils/util';
+
+/**
+  * 玩家抽卡表
+**/
+@modelOptions({ schemaOptions: { id: false } })
+@index({ code: 1 })
+
+export default class UserGachaRec extends BaseModel {
+
+    @prop({ required: true })
+    code: string;					// 玩家id
+
+    @prop({ required: true })
+    roleId: string;					// 玩家id
+
+    @prop({ required: true })
+    gachaId: number;			    // 抽卡id 1-元宝 2-友情 3-指定 4-限时
+
+    @prop({ required: true, default: 0 })
+    activityId: number;			        // 限时抽卡对应活动id
+
+    @prop({ required: true, default: 0 })
+    count: number;			      // 抽卡次数
+
+    @prop({ required: true, type: GachaResult, default: [], _id: false })
+    result: GachaResult[];             // 结果
+
+    public static async createRec(roleId: string, gachaId: number, activityId: number, count: number, result: GachaResult[]) {
+        let code = genCode(8);
+        const rec = await UserGachaRecModel.findOneAndUpdate({ code }, { $set: { roleId, gachaId, activityId, count, result } }, { new: true, upsert: true });
+        return rec;
+    }
+}
+
+export const UserGachaRecModel = getModelForClass(UserGachaRec);
+
+export interface UserGachaRecType extends Pick<DocumentType<UserGachaRec>, keyof UserGachaRec> { }
+export type UserGachaRecParam = Partial<UserGachaRecType>;