后台：增加后台数据库表，修复连接问题

shared/db/GMRecord.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';
 
 /**
   * GM用户组接口
@@ -28,6 +28,11 @@ export default class GMRecord extends BaseModel {
   
 }
 
-export const GMRecordModel = getModelForClass(GMRecord);
+export let GMRecordModel: ReturnModelType<typeof GMRecord, {}>;
+export function loadGMRecordModel(connect: mongoose.Connection) {
+  GMRecordModel = getModelForClass(GMRecord, {
+        existingConnection: connect
+    });
+}
 
 export interface GMRecordType extends Pick<DocumentType<GMRecord>, keyof GMRecord>{};