嗨,我有一个集合和两个视图。在我的视图1中,我将数据添加到我的集合中,view2将仅显示和显示有关集合的任何更改。但我无法实现它的工作。问题原本是我这样做在backbone.js的两个视图访问集合
return new CartCollection();
但他们说这是一个不好的做法,所以我删除了改变它。但是当我在view1上实例化购物车集合时,它会添加,但是看起来view2并没有看到这些变化并且什么都不渲染。
任何想法?
这里是我的购物车收藏。
define([
'underscore',
'backbone',
'model/cart'
], function(_, Backbone, CartModel) {
var CartCollection = Backbone.Collection.extend({
model : CartModel,
initialize: function(){
}
});
return CartCollection;
});
这里是我的ItemView控件(厂景)
AddToCart:function(ev){
ev.preventDefault();
//get data-id of the current clicked item
var id = $(ev.currentTarget).data("id");
var item = this.collection.getByCid(id);
var isDupe = false;
//Check if CartCollection is empty then add
if(CartCollection.length === 0){
CartCollection.add([{ItemCode:item.get("ItemCode"),ItemDescription:item.get("ItemDescription"),SalesPriceRate:item.get("RetailPrice"),ExtPriceRate:item.get("RetailPrice"),WarehouseCode: "Main",ItemType : "Stock",LineNum:1 }]);
}else{
//if check if the item to be added is already added, if yes then update QuantityOrdered and ExtPriceRate
_.each(CartCollection.models,function(cart){
if(item.get("ItemCode") === cart.get("ItemCode")){
isDupe = true;
var updateQty = parseInt(cart.get("QuantityOrdered"))+1;
var extPrice = parseFloat(cart.get("SalesPriceRate") * updateQty).toFixed(2);
cart.set({ QuantityOrdered: updateQty });
cart.set({ ExtPriceRate: extPrice });
}
});
//if item to be added has no duplicates add new item
if(isDupe == false){
var cartCollection = CartCollection.at(CartCollection.length - 1);
var lineNum = parseInt(cartCollection.get("LineNum")) + 1;
CartCollection.add([{ItemCode:item.get("ItemCode"),ItemDescription:item.get("ItemDescription"),SalesPriceRate:item.get("RetailPrice"),ExtPriceRate:item.get("RetailPrice"),WarehouseCode: "Main",ItemType : "Stock",LineNum:lineNum}]);
}
}
CartListView.render();
}
我cartview(视图2)
render: function(){
this.$("#cartContainer").html(CartListTemplate);
var CartWrapper = kendobackboneModel(CartModel, {
ItemCode: { type: "string" },
ItemDescription: { type: "string" },
RetailPrice: { type: "string" },
Qty: { type: "string" },
});
var CartCollectionWrapper = kendobackboneCollection(CartWrapper);
this.$("#grid").kendoGrid({
editable: true,
toolbar: [{ name: "save", text: "Complete" }],
columns: [
{field: "ItemDescription", title: "ItemDescription"},
{field: "QuantityOrdered", title: "Qty",width:80},
{field: "SalesPriceRate", title: "UnitPrice"},
{field: "ExtPriceRate", title: "ExtPrice"}
],
dataSource: {
schema: {model: CartWrapper},
data: new CartCollectionWrapper(CartCollection),
}
});
},
如何在两个视图之间传递对CartCollection实例的引用?这可能是问题所在。 – 2012-04-04 07:02:49
我不太确定,但我只是在这两个视图上添加了这段代码。 var cartcollection = new CartCollection();我做对了吗? – jongbanaag 2012-04-04 07:17:24