sequelize associations
Creating the standard relationships
To create a One-To-One relationship, the hasOne and belongsTo associations are used together;
To create a One-To-Many relationship, the hasMany and belongsTo associations are used together;
To create a Many-To-Many relationship, two belongsToMany calls are used together.sequelize associations
const User = sequelize.define('user', { name: DataTypes.STRING }, { timestamps: false });
const Task = sequelize.define('task', { name: DataTypes.STRING }, { timestamps: false });
const Tool = sequelize.define('tool', {
name: DataTypes.STRING,
size: DataTypes.STRING
}, { timestamps: false });
User.hasMany(Task);
Task.belongsTo(User);
User.hasMany(Tool, { as: 'Instruments' });
//access the model
const tasks = await Task.findAll({ include: User });
//output
[{
"name": "A Task",
"id": 1,
"userId": 1,
"user": {
"name": "John Doe",
"id": 1
}
}]Copyright © 2021 Codeinu
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