fix: mysql init bug

lib/db/mysql.js

@@ -26,7 +26,23 @@ class MySqlClient {
       Object.assign(options, {})
     )
 
+    this.testConnection = this.testConnection.bind(this)
+    this.initialize = this.initialize.bind(this)
+
     this.instance = this.initialize()
+    this.testConnection()
+  }
+
+  async testConnection() {
+    try {
+      // 测试数据库连接
+      await this.sequelize.authenticate()
+      logger.info(
+        'Database connection has been established successfully.'
+      )
+    } catch (error) {
+      logger.error('Unable to connect to the database:', error)
+    }
   }
 
   initialize() {
@@ -48,6 +64,8 @@ class MySqlClient {
               force: false
             })
             db[model.name] = model
+
+            logger.info('Loaded DB model: ' + model.name)
           } else {
             db[file] = {}
             fs.readdirSync(path.join(this.modelDir, file))
@@ -60,6 +78,7 @@ class MySqlClient {
                   file,
                   f
                 ))(this.sequelize)
+
                 //如果表不存在，则创建表
                 model.sync({
                   force: false

models/mysql/index.js

@@ -6,7 +6,7 @@ let client
 
 if (config.app.mysql) {
   const MySqlDbClient = require('../../lib/db/mysql')
-  const client = new MySqlDbClient(config.db.mysql, __dirname)
+  client = new MySqlDbClient(config.db.mysql, __dirname)
 }
 
 module.exports.client = client