sequelize do not include junction table in associated model data

Question

Lets say I have 2 models, User and Event. They are set up as am:m relationship User.belongsToMany(Event) and Event.belongsToMany(User) . This all works fine, but when I do User.findAndCountAll({include: [{model: Event}]}) , the resulting json for result.rows looks like

[
    ...
    {
        userdata...,
        events: [ // included by model relation
        ...included event data...,
        junction_table: { // I dont want this data sent back to client, just above data
            ...data i dont want...
        }
    }
...
]

I want

[
    {
    userdata...,
    events: [
        { included event data without junction_table }
    ]
    }
]

Is there a way to strip out the junction_table that for some reason is automatically included with every single event without .mapping over the data and rebuilding it? I'd rather not send all this data I don't need over the wire to the clients all the time. I tried only specifying attributes: [] on the model, but it won't go away.

Answer 1

This can be achieved by specifying that you don't want the "through" table attributes, according to this SO question .

In your case, it would be :

User.findAndCountAll({
    include: 
        [{model: Event, through: { attributes: [] }}]
    });

Answer 2

SELECT *
FROM a
JOIN b ON EXISTS
        ( SELECT * FROM junction j
        WHERE j.a_id = a.a_id
        AND j.b_id = b.b_id
        );

---

This only works if the junction table is unique on {a_id , b_id} , with a_id , b_id being the primary keys of a and b .