Sequelize, Typescript - typescript make an error to model's getter method

Question

Let's say, I have two models User and Post, and they are associated as one to many relationship:

const User = sequelize.define('user', {
    ...
});

const Post = sequelize.define('post', {
    ...
});

User.hasMany(Post);

Then if I get some posts from a user using getPosts method,

const user = await User.findOne({...});
const posts = await user.getPosts();
                         ^^^^^^^^

Typescript makes an error:

error TS2339: Property 'getPosts' does not exist on type '{}'.

What should I do for it? Any suggestions will be appreciated.

Matt McCutchen · Accepted Answer · 2018-08-16 21:29:28Z

1

From what I read, the TypeScript typings for Sequelize are incomplete. You can specify the attributes of your objects when you call sequelize.define as shown here, but this won't declare a getPosts method AFAIK. The sequelize-typescript package appears to offer an alternative way to get related objects, though I haven't tried any of this myself.

answered Aug 16, 2018 at 21:29

Matt McCutchen

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1 Comment

yakkisyou Over a year ago

I didn't want to use sequelize-typescript :( but I should use it unavoidably.

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