骨干关系属于

Question

如何使用主干和主干关系创建和使用属于（或多对一）的关系？

Answer 1

例如，如果你们的关系是，一栋楼有很多房间。 房间属于建筑物：

Building = Backbone.RelationalModel.extend({
    relations: [
        {
            type: 'HasMany',
            key: 'rooms',
            relatedModel: 'Room',
            reverseRelation: {
                key: 'building'
            }
        }
    ]
});
Room = Backbone.RelationalModel.extend();
house = new Building({id:1});
science_building = new Building({id:2});
console.log(house.get('rooms').length);  // ==> 0
living_room = new Room({building:1,name:"Living Room"});
lab = new Room({building:2,name:"Chemistry Lab"});
console.log(house.get('rooms').length); // ==> 1
console.log(house.get('rooms').first().get('name')); // ==> "Living Room"
console.log(science_building.get('rooms').length); // ==> 1
console.log(science_building.get('rooms').first().get('name')); // ==> "Chemistry Lab"

属性指定关系的"belongs_to"部分。