排序：超出一级关系的联接表

Question

I have the following relationships:

• User has Subscription
• Subscription has Subject
• Subject has Lesson

If this was a multi-demensional array, it would look like this:

`User` =>
      (`Subscription` => 
                 `Subject` => 
                     (`Lesson`, `Lesson`),
       `Subscription` => 
                 `Subject` =>
                     (`Lesson`, `Lesson`)
       ,  ...)

How do I query the full dataset preserving this structure using Sequelize? If I had to write it in "sequelize pseudo-code", I would have something like:

seq.User.findAll({
include[seq.Subscription.findAll({
include[seq.Subject.findAll({include: [seq.Lesson]}) ...

Answer 1

This should be about what you'd need. You nearly had the idea/flow in your pseudo code. They may be a more efficient way to write this/do this? But this should work

 seq.User.findAll({ where: {}, include: [{ model: seq.Subscription, include: [{ model: seq.Subject, include: [{ seq.Lesson }] }] }] }).then(function(responseFromDB) { handle callback });