主干嵌套集合

Backbone nested collection

本文关键字：集合嵌套更新时间：2023-09-26

我在主干网中有一个从服务器检索数据的应用程序。这些数据是酒店和每个酒店我有更多的房间。我把酒店分为一个json和另一个json内的房间，如下所示：

hotel.json

[
  {
    "id": "1", 
    "name": "Hotel1"
  }, 
  {
    "id": "2", 
    "name": "Hotel2"
  }, 
  {
    "id": "3", 
    "name": "Hotel3"
  }
]

rooms.json

[
  {
    "id" : "r1",
    "hotel_id" : "1",
    "name" : "Singola",
    "level" : "1"
  },
  {
    "id" : "r1_1",
    "hotel_id" : "1",
    "name" : "Doppia",
    "level" : "2"
  },
  {
    "id" : "r1_3",
    "hotel_id" : "1",
    "name" : "Doppia Uso singol",
    "level" : "1"
  },
  {
    "id" : "r2",
    "hotel_id" : "2",
    "name" : "Singola",
    "level" : "1"
  },
  {
    "id" : "r2_1",
    "hotel_id" : "2",
    "name" : "Tripla",
    "level" : "1"
  }
]

我想把每个酒店和它的房间组合起来（外部键输入rooms.json hotel_id），并打印房间的组合：每个级别组合不同的房间。

一层一间、二层一间和三层一间。

级别的最大值是3，但我只能有一个级别或只有两个级别。如果我有3级，我不希望没有3级的1级和2级的组合。

像这样的

Room "Single", "level" : "1" , "hotel_id" : "1"
Room "Double", "level" : "2" , , "hotel_id" : "1"
Room "Triple", "level" : "3" , , "hotel_id" : "1"

Room "Double for single", "level" : "1" , "hotel_id" : "1"
Room "Double", "level" : "2" , , "hotel_id" : "1"
Room "Triple", "level" : "3" , , "hotel_id" : "1"

我认为这个房间的构造函数是将renderRooms放入我的应用程序中。

这是我的应用程序：

var Room = Backbone.Model.extend();
var Rooms = Backbone.Collection.extend({
    model: Room,
    url: "includes/rooms.json"
});
var Hotel = Backbone.Model.extend({
    defaults: function() {
        return {
            "id": "1",
            "name": "Hotel1",
            "rooms": []
        }
    }
});
var HotelCollection = Backbone.Collection.extend({
    model: Hotel,
    url: "includes/test-data.json",
    initialize: function() {
        console.log("Collection Hotel initialize");
    }
});
var HotelView = Backbone.View.extend({
    template: _.template($("#hotel-list-template").html()),
    initialize: function() {
        this.collection = new HotelCollection();
        this.collection.bind('sync', this.render, this);
        this.collection.fetch();
    },
    render: function() {
        console.log('Data hotel is fetched');
        this.bindRoomToHotel();
        var element = this.$el;
        element.html('');
    },
    bindRoomToHotel: function() {
        allRooms = new Rooms();
        allRooms.on("sync", this.renderRooms, this)
        allRooms.fetch();
    },
    renderRooms: function() {

        $(this.el).html(this.template({ hotels: this.collection.models }));
    }
});
var hotelView = new HotelView({
    el: $("#hotel")
});

如何创建此房间组合并打印
有没有好的方法或更好的方法？

以下是如何构建Collections:

HotelModel = Backbone.Model.extend({
    initialize: function() {
        // because initialize is called after parse
        _.defaults(this, {
            rooms: new RoomCollection
        });
    },
    parse: function(response) {
        if (_.has(response, "rooms")) {
            this.rooms = new RoomCollection(response.rooms, {
                parse: true
            });
            delete response.rooms;
        }
        return response;
    },
    toJSON: function() {
        var json = _.clone(this.attributes);
        json.rooms = this.rooms.toJSON();
        return json;
    }
});
RoomModel = Backbone.Model.extend({
});
HotelCollection = Backbone.Collection.extend({
    model: HotelModel
});
RoomCollection = Backbone.Collection.extend({
    model: RoomModel
});

然后你可以做这样的事情：

var hotels = new HotelCollection();
hotels.reset([{
    id: 1,
    name: 'Hotel California',
    rooms: [{
        id: 1,
        name: 'Super Deluxe'
    }]
}], {
    parse: true // tell the collection to parse the data
});
// retrieve a room from a hotel
hotels.get(1).rooms.get(1);
// add a room to the hotel
hotels.get(1).rooms.add({id:2, name:'Another Room'});