Mongoose dynamic schema field

Question

I need to develop a model using mogoose with a field that will hold my object attributes. My problem is that these attributes are totaly changable, something like:

StockItem1 : {
    sku: 23492349,
    class: 'computer',
    subclass: 'printer',
    name: 'Hp Laserjet XXX',
    qty: 120,
    attr: {
        laser: true,
        speed: 1200,
        color: white
    }
}

StockItem2 : {
    sku: 22342349,
    class: 'homeappliance',
    subclass: 'refrigerator',
    name: 'GE Refrigerator',
    qty: 23,
    attr: {
        stainlessstell: true,
        doors: 2,
        frostfree: true
    }
}

The attr attributes fields are totally different depending of what type of class/subclass it belongs to.

What type should be given to attr field in mongoose ? I need to filter those in the future, like get all itens where attr.doors == 2 .

Thanks for helping.

Answer 1

Use a Mixed Schema Type. Here are the docs . Mixed SchemaTypes are sort of an 'anything goes' type of deal. You have flexibility when it comes to defining data but it makes your collection harder to maintain.