添加后台连接用的后端

gm-server/app.ts

@@ -0,0 +1,58 @@
+import 'reflect-metadata'
+import * as mongoose from 'mongoose';
+import { Application, IBoot } from 'egg';
+
+export default class FooBoot implements IBoot {
+  private readonly app: Application;
+
+  constructor(app: Application) {
+    this.app = app;
+  }
+
+  async configWillLoad() {
+    // Ready to call configDidLoad,`
+    // Config, plugin files are referred,`
+    // this is the last chance to modify the config.
+    await this.connectDB(this.app)
+  }
+
+  configDidLoad() {
+    // Config, plugin files have loaded.
+  }
+
+  async didLoad() {
+    // All files have loaded, start plugin here.
+  }
+
+  async willReady() {
+    // All plugins have started, can do some thing before app ready.
+    // await this.customLoadModel();
+  }
+
+  async didReady() {
+    // Worker is ready, can do some things
+    // don't need to block the app boot.
+  }
+
+  async serverDidReady() {
+    // Server is listening.
+  }
+
+  async beforeClose() {
+    // Do some thing before app close.
+  }
+
+  //#region 手动挂载model，测试需要ctx.model 
+
+  public async connectDB(app: Application) {
+    const { url, options } = app.config.mongoose
+    if (url) {
+      const connection = await mongoose.connect(url, options)
+      app.context.connection = connection
+    }
+  }
+
+  //#endregion
+}
+  
+  module.exports = FooBoot;