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// Define the models
const User = sequelize.define('User', { /* attributes */ });
const Post = sequelize.define('Post', { /* attributes */ });
// Define the association
User.hasMany(Post);
Post.belongsTo(User);
// Create a user and their posts
const user = await User.create({ name: 'John Doe' });
const post1 = await Post.create({ title: 'First post' });
const post2 = await Post.create({ title: 'Second post' });
// Associate the posts with the user
await user.setPosts([post1, post2]);
// Get the posts belonging to the user
const posts = await user.getPosts();
In this example, we define two models, User and Post, and define a one-to-many relationship between them using User.hasMany(Post) and Post.belongsTo(User). We then create a user and two posts, and associate the posts with the user using user.setPosts([post1, post2]). Finally, we retrieve the posts belonging to the user using user.getPosts().
Mongoose provides similar functionality for defining and managing relationships between documents in MongoDB.
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