update

config/config.json

@@ -0,0 +1,14 @@
+{
+  "development": {
+    ""
+    "dialect": "mysql"
+  },
+  "test": {
+    
+    "dialect": "mysql"
+  },
+  "production": {
+    
+    "dialect": "mysql"
+  }
+}

models/index.js

@@ -0,0 +1,43 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const Sequelize = require('sequelize');
+const process = require('process');
+const basename = path.basename(__filename);
+const env = process.env.NODE_ENV || 'development';
+const config = require(__dirname + '/../config/config.json')[env];
+const db = {};
+
+let sequelize;
+if (config.use_env_variable) {
+  sequelize = new Sequelize(process.env[config.use_env_variable], config);
+} else {
+  sequelize = new Sequelize(config.database, config.username, config.password, config);
+}
+
+fs
+  .readdirSync(__dirname)
+  .filter(file => {
+    return (
+      file.indexOf('.') !== 0 &&
+      file !== basename &&
+      file.slice(-3) === '.js' &&
+      file.indexOf('.test.js') === -1
+    );
+  })
+  .forEach(file => {
+    const model = require(path.join(__dirname, file))(sequelize, Sequelize.DataTypes);
+    db[model.name] = model;
+  });
+
+Object.keys(db).forEach(modelName => {
+  if (db[modelName].associate) {
+    db[modelName].associate(db);
+  }
+});
+
+db.sequelize = sequelize;
+db.Sequelize = Sequelize;
+
+module.exports = db;

package.json

@@ -11,9 +11,13 @@
     "ejs": "^3.1.10",
     "express": "^4.21.0",
     "http-errors": "~1.6.3",
-    "morgan": "~1.9.1"
+    "morgan": "~1.9.1",
+    "pg": "^8.13.1",
+    "sequelize": "^6.37.5",
+    "sqlite3": "^5.1.7"
   },
   "devDependencies": {
-    "nodemon": "^3.1.7"
+    "nodemon": "^3.1.7",
+    "sequelize-cli": "^6.6.2"
   }
 }