我尝试从 productsView
内的 menusCollection
获取数据。我正在尝试在一个主干 View 中从多个获取的集合中加载数据。所以我真的很挣扎,如果有任何帮助,我将非常感激。
router.js:
app_router.on('route:products', function() {
var menusCollection = new MenusCollection();
menusCollection.fetch();
var productsCollection = new ProductsCollection();
productsCollection.fetch({
success: function () {
var productsView = new ProductsView({model:productsCollection.models},{menu:menusCollection.models});
productsView.render();
}
});
});
ProductsView.js:
var menusCollection = new MenusCollection();
var products = this.model;
var productsCollection = new ProductsCollection(products);
this.el.innerHTML = _.template( productsTemplate, {data: menusCollection.toJSON()});
然后在productsTemplate中我想渲染多个集合,例如:
<% _.each( data, function( product, i ){ %>
<%= product.product_title %>
<% }) %>
<% _.each( data, function( menu, i ){ %>
<%= menu.menu_title %>
<% }) %>
我的模板已加载,但没有收集到的数据。我怎么才能得到它 ? 非常感谢!
已编辑,它正在工作,但是,这是在一个 View 中处理多个集合的好方法吗?
router.js:
app_router.on('route:products', function() {
var menusCollection = new MenusCollection();
menusCollection.fetch({
success: function () {
var productsCollection = new ProductsCollection();
productsCollection.fetch({
success: function () {
var productsView = new ProductsView({model:productsCollection.models, collection:menusCollection.models});
productsView.render();
}
});
}
});
});
或者类似的东西?
app_router.on('route:products', function() {
var menusCollection = new MenusCollection();
var productsCollection = new ProductsCollection();
$.when( menusCollection.fetch(), productsCollection.fetch() ).done(function () {
var productsView = new ProductsView({model:productsCollection.models, collection:menusCollection.models});
productsView.render();
});
});
ProductsView.js:
var products = this.model;
var menus = this.collection;
var menusCollection = new MenusCollection(menus);
var productsCollection = new ProductsCollection(products);
this.el.innerHTML = _.template( productsTemplate, {data: productsCollection.toJSON(), menus: menusCollection.toJSON()});
产品模板
<% _.each( data, function( product, i ){ %>
<%= product.product_title %>
<% }) %>
<% _.each( menus, function( menu, i ){ %>
<%= menu.menu_title %>
<% }) %>
最佳答案
看起来这是一个常见的 XHR 问题。 您必须等到集合被来自服务器的数据填充。因此,只需在获取数据后渲染模板即可:
menusCollection.fetch({context: this}).done(function () {
this.el.innerHTML = _.template(productsTemplate, {data: menusCollection.toJSON()});
});
此外,您还使用错误模型值创建 View - new ProductsView({model:productsCollection.models});
。它应该是 Backbone.Model 但在您的示例中它是集合模型的数组。如果要将集合传递给 View ,请使用 collection
属性名称。
如果我是你,我会写这样的东西:
var ProductsView = Backbone.View.extend({
initialize: function (options) {
this.menusCollection = options.menusCollection;
},
render: function () {
this.$el.html(_.template(productsTemplate, {
data: this.collection.toJSON(),
menus: this.menusCollection.toJSON()
}));
}
});
app_router.on('route:products', function () {
var menusCollection = new MenusCollection();
var productsCollection = new ProductsCollection();
$.when(menusCollection.fetch(), productsCollection.fetch()).done(function () {
var productsView = new ProductsView({
menusCollection: menusCollection,
collection: productsCollection
});
productsView.render();
});
});
关于javascript - 我无法使用 lodash _.template 从一个主干 View 内的多个集合中获取数据,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27766129/