ObjectDataField

This field class handles fields that hold an object.

class Person extends Model {
    static fields = [
        'name',
        { name : 'address', type : 'object' }
    ];
}

For the field to count as modified, the whole object has to be replaced:

person.address = { ...address };

Or, sub properties of the object has to be modified using calls to set():

person.set('address.street', 'Main Street');

Note that if any property of the nested object requires conversion after load, you have to define that property as a field:

class Order extends Model {
    static fields = [
        'title',
        { name : 'details', type : 'object' },
        { name : 'details.date', type : 'date' }
    ];
}

const order = new Order({
   title   : 'Order 1',
   details : {
     customer : 'Bill',
     // Definition above required for this to be converted to a date
     date     : '2020-01-01'
   }
});