Sequlize how to do nested joins

问题

I have four models. namely

1. images
2. restaurant_items
3. restaurant
4. item

images.belongsTo (restaurant_items)

Which means I can get all the restaurant_items table details associated with the image like this,

const all_approved_images = await db.images.findAll({
            where: {
                status: "approved"
            },
            include: ['res_item']
        })

But I want to get the ITEM TABLE AND RESTAURANT TABLE details at the same time

restaurant_items belongs to restaurant

restaurant_items belongs to item

I tried this

const all_approved_images = await db.images.findAll({
            where: {
                status: "approved"
            },
            include: ['res_item','res','item']
        })

This didn't worked. Says

Association with alias "res" does not exists

of cause it doesn't exists with the images But it exists with the restaurant_items

There should be a way to link all this things.

How do I achieve this?

回答1:

Here you go , getting data from nested levels :

db.images.findAll({
    where: {
        status: "approved"
    },
    include: { 
        association: 'res_item' , // <---- First Level
        include : {
            association: 'res' , // <---- Second Level
            include : {
                association: 'item' , // <---- Third Level
            }
        }
    }
})

来源：https://stackoverflow.com/questions/51946774/sequlize-how-to-do-nested-joins