活动：添加抽卡数据类型

shared/domain/activityField/gachaField.ts

@@ -0,0 +1,23 @@
+import { prop } from '@typegoose/typegoose';
+import { ActivityModelType } from '../../db/Activity';
+import { ActivityBase } from './activityField';
+
+
+// 抽卡数据
+export class GachaData extends ActivityBase {
+    @prop({ required: true })
+    gachaId: number = 0;
+    @prop({ required: true })
+    heroes: Array<number> = [];
+
+
+    public initData(data: string) {
+        let obj = JSON.parse(data);
+        this.gachaId = obj.gachaId;
+        this.heroes = obj.heroes;
+    }
+
+    constructor(activityData: ActivityModelType) {
+        super(activityData)
+    }
+}