SequelizeJS - hasMany to hasMany on the same table with a join table

Question

My problem is quite simple:

I got a table named users. Those users can have a lot of contacts. Those contacts are other users.

So I have a table

Answer 1

Since what you are trying to do is a self association you only need to call hasMany once, which will create a junction table

User.hasMany(User, { as: 'Contacts', joinTableName: 'userHasContacts'})

Which will create the userHasContacts table as:

CREATE TABLE IF NOT EXISTS `userHasContacts` (`userId` INTEGER , `ContactsId` INTEGER , `createdAt` DATETIME NOT NULL, `updatedAt` DATETIME NOT NULL, PRIMARY KEY (`userId`,`ContactsId`)) ENGINE=InnoDB;

To find users and their contacts you can then do:

User.find({ where: ..., include: [{model: User, as: 'Contacts'}]})