Automatic database and table creation

app/config/db.config.js

@@ -2,5 +2,6 @@ module.exports = {
   HOST: "localhost",
   USER: "root",
   PASSWORD: "123456",
-  DB: "testdb"
+  DB: "testdb",
+  DIALECT: "mysql"  
 };

app/config/db.init.js

@@ -0,0 +1,81 @@
+/**
+Initialization script for database setup.
+
+Usage:
+Run this file once to create the database (and optionally the tables):
+$ node ./app/config/db.init.js
+
+By default, this script runs immediately when executed.
+It does NOT export any functions since it’s meant to be a one-time setup.
+If you prefer to import and call the functions manually elsewhere, 
+just uncomment the last line, and paste the following script in the desired file:
+
+  const { createDatabase, createTables } = require('./app/config/db.init');
+  createDatabase();
+  createTables();
+
+*/
+
+const { Sequelize } = require("sequelize");
+const dbConfig = require("../config/db.config.js");
+
+async function createDatabase() {
+  const sequelize = new Sequelize("", dbConfig.USER, dbConfig.PASSWORD, {
+    host: dbConfig.HOST,
+    dialect: dbConfig.DIALECT,
+  });
+
+  try {
+    await sequelize.query(`CREATE DATABASE IF NOT EXISTS \`${dbConfig.DB}\`;`);
+    console.log(`Database "${dbConfig.DB}" created successfully!`);
+
+  } catch (err) {
+    console.error("Error creating database:", err);
+
+  } finally {
+    await sequelize.close();
+  }
+}
+
+async function createTables() {
+  const sequelize = new Sequelize(dbConfig.DB, dbConfig.USER, dbConfig.PASSWORD, {
+    host: dbConfig.HOST,
+    dialect: dbConfig.DIALECT,
+  });
+
+  // every table should be imported as it follows:
+  const { TutorialModel } = require("../models/tutorial.model.js");
+
+  // the model should be added to "modelNameList":
+  const modelNameList = [TutorialModel];
+
+  for (const modelDef of modelNameList) {
+    const attributes = modelDef.getAttributes();
+    sequelize.define(
+      modelDef.name,
+      attributes,
+      {
+        ...(modelDef.options || {}),
+        tableName: modelDef.options?.tableName ?? modelDef.tableName
+      }
+    );
+  }
+
+  try {
+    await sequelize.sync({ force: true });
+    console.log(`All tables created/updated successfully in database "${dbConfig.DB}"!`);
+  } catch (err) {
+    console.error(`Failed to create tables:`, err);
+  } finally {
+    await sequelize.close();
+  }
+}
+
+async function init() {
+  await createDatabase();
+  await createTables();
+}
+
+init();
+
+// module.exports = { createDatabase, createTables }; // uncomment line to export function

app/models/tutorial.model.js

@@ -1,4 +1,6 @@
 const sql = require("./db.js");
+const dbConfig = require("../config/db.config.js");
+const { Sequelize, DataTypes } = require('sequelize');
 
 // constructor
 const Tutorial = function(tutorial) {
@@ -7,6 +9,35 @@ const Tutorial = function(tutorial) {
   this.published = tutorial.published;
 };
 
+// connecting to database
+const sequelize = new Sequelize(dbConfig.DB, dbConfig.USER, dbConfig.PASSWORD, {
+  host: dbConfig.HOST,
+  dialect: dbConfig.DIALECT,
+});
+
+// example table definition (every table model should be exported in the last line)
+const TutorialModel = sequelize.define('Tutorial', {
+  id: {
+    type: DataTypes.INTEGER(11),
+    primaryKey: true,
+    autoIncrement: true,
+  },
+  title: {
+    type: DataTypes.TEXT,
+    allowNull: false,
+  },
+  description: {
+    type: DataTypes.STRING,
+  },
+  published: {
+    type: DataTypes.BOOLEAN,
+    defaultValue: false,
+  }
+}, {
+  tableName: 'tutorials',
+  timestamps: true,
+});
+
 Tutorial.create = (newTutorial, result) => {
   sql.query("INSERT INTO tutorials SET ?", newTutorial, (err, res) => {
     if (err) {
@@ -126,4 +157,5 @@ Tutorial.removeAll = result => {
   });
 };
 
-module.exports = Tutorial;
+// add here modules to export
+module.exports = { Tutorial, TutorialModel };

package.json

@@ -17,6 +17,8 @@
   "dependencies": {
     "cors": "^2.8.5",
     "express": "^4.18.2",
-    "mysql": "^2.18.1"
+    "mysql": "^2.18.1",
+    "mysql2": "^3.15.2",
+    "sequelize": "^6.37.7"
   }
 }