数据库：将activities等表移到gm数据库中

shared/db/ActivityGroup.ts

@@ -1,5 +1,5 @@
 import BaseModel from './BaseModel';
-import { index, getModelForClass, prop, DocumentType } from '@typegoose/typegoose';
+import { index, getModelForClass, prop, DocumentType, ReturnModelType, mongoose } from '@typegoose/typegoose';
 import { CounterModel } from './Counter';
 import { COUNTER } from '../consts';
 import { ActivityModel } from './Activity';
@@ -169,7 +169,12 @@ export default class Activity_Group extends BaseModel {
     }
 }
 
-export const ActivityGroupModel = getModelForClass(Activity_Group);
+export let ActivityGroupModel: ReturnModelType<typeof Activity_Group, {}>;
+export function loadActivityGroup(connect: mongoose.Connection) {
+    ActivityGroupModel = getModelForClass(Activity_Group, {
+        existingConnection: connect
+    });
+}
 
 export interface ActivityGroupModelType extends Pick<DocumentType<Activity_Group>, keyof Activity_Group> { }
 export type ActivityGroupModelTypeParam = Partial<ActivityGroupModelType>; // 将所有字段变成可选项