[[:oktatas:web:back-end_framework:express|< Express]]

====== Express - Táblák kapcsolása ======

  * **Szerző:** Sallai András
  * Copyright (c) 2025, Sallai András
  * Licenc: [[https://creativecommons.org/licenses/by-sa/4.0/|CC Attribution-Share Alike 4.0 International]]
  * Web: https://szit.hu

===== Táblák =====

  employees(id, name, city, salary, rankId)
  ranks(id, name)

===== Model =====

<code javascript employees.js>
import { DataTypes } from 'sequelize'
import sequelize from '../database/database.js'
import Rank from './rank.js'

const Employee = sequelize.define('employee', {
    id: { 
        type: DataTypes.INTEGER,
        autoIncrement: true,
        primaryKey: true
    },
    name: { type: DataTypes.STRING,  allowNull: false  },
    city: { type: DataTypes.STRING,  allowNull: true  },
    salary: { type: DataTypes.DOUBLE,  allowNull: true  },
    rankId: { 
        type: DataTypes.INTEGER,  
        allowNull: true,
        references: {
            model: Rank,
            key: 'id'
        }
    }
})

Employee.belongsTo(Rank, {
    foreignKey: 'rankId'
})

sequelize.sync({
    force: false
})

export default Employee

</code>

===== Kontroller =====

A dolgozók lekérdezéséhez kapcsoljuk a beosztásokat.

<code javascript>
const employees = await Employee.findAll({
    include: {
        model: Rank,
        attributes: ['name']
    }
})
</code>