sequelize associations

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showing results for - "sequelize associations"

1Creating the standard relationships
2To create a One-To-One relationship, the hasOne and belongsTo associations are used together;
3To create a One-To-Many relationship, the hasMany and belongsTo associations are used together;
4To create a Many-To-Many relationship, two belongsToMany calls are used together.
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1const User = sequelize.define('user', { name: DataTypes.STRING }, { timestamps: false });
2const Task = sequelize.define('task', { name: DataTypes.STRING }, { timestamps: false });
3const Tool = sequelize.define('tool', {
4  name: DataTypes.STRING,
5  size: DataTypes.STRING
6}, { timestamps: false });
7User.hasMany(Task);
8Task.belongsTo(User);
9User.hasMany(Tool, { as: 'Instruments' });
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11
12//access the model
13const tasks = await Task.findAll({ include: User });
14
15//output
16
17[{
18  "name": "A Task",
19  "id": 1,
20  "userId": 1,
21  "user": {
22    "name": "John Doe",
23    "id": 1
24  }
25}]

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