Question

我有两个集合视图。这些视图从products.json渲染每个对象，然后从categories.json到<li><%= title %></li>再渲染每个对象。现在我想渲染每个类别包括来自类别的每个产品......

//！所有类别视图

App.Views.Categories = Backbone.View.extend({
    tagName: 'ul',
    className: 'categories',
    initialize: function() {
      this.collection.on('add', this.addOne, this);  
    },
    render: function() {
      this.collection.each( this.addOne, this );
      return this;
    },
    addOne: function(category) {
        var categoryView = new App.Views.Category({ model: category });
        this.$el.append(categoryView.render().el);
    },
});

//！单一类别视图

App.Views.Category = Backbone.View.extend({
    tagName: 'li',
    className: 'category',
    template: template('allCategoryTemlate'),
    initialize: function() {
      this.model.on('destroy', this.unrender, this);
      this.model.on('change', this.render, this);
    },
    render: function() {
      this.$el.html( this.template( this.model.toJSON() ) );
      return this;
    },
});

//！所有产品视图

App.Views.Products = Backbone.View.extend({
    tagName: 'ul',
    className: 'products',
    initialize: function() {
      this.collection.on('add', this.addOne, this);  
    },
    render: function() {
      this.collection.each( this.addOne, this );
      return this;
    },
    addOne: function(product) {
        var productView = new App.Views.Product({ model: product });
        this.$el.append(productView.render().el);
    },
});

//！单一产品视图

App.Views.Product = Backbone.View.extend({
    tagName: 'li',
    className: 'product',
    template: template('allProductTemlate'),
    initialize: function() {
      this.model.on('destroy', this.unrender, this);
      this.model.on('change', this.render, this);
    },
    render: function() {
      this.$el.html( this.template( this.model.toJSON() ) );
      return this;
    },
});

我的产品：

[   
    {"product_id": 1, "category": "CATEGORY1", "title": "Product 1", "price": 12},
    {"product_id": 2, "category": "CATEGORY1", "title": "Product 2", "price": 12},
    {"product_id": 3, "category": "CATEGORY1", "title": "Product 3", "price": 12},
    {"product_id": 4, "category": "CATEGORY2", "title": "Product 4", "price": 12},
    {"product_id": 5, "category": "CATEGORY2", "title": "Product 5", "price": 12}
]

我的类别：

[
    {"category_id": 1, "value": "CATEGORY1", "title": "Category 1"},
    {"category_id": 2, "value": "CATEGORY2", "title": "Category 2"},
]

我需要的例子：

Category 1
    - Product 1 
    - Product 2 
    - Product 3 

Category 2
    - Product 4 
    - Product 5

这对我的申请非常重要，所以我对每一个意见都会非常苛刻。我可以制作类似的东西：

var filtered = products.filter(function(product) {
    return product.get('category') == 'and there I need value from category ?';
});

或者在模板中，例如：

<% _.each(categories, function(category) { %>
    <%= category.get('title') %>
    <li><%= title %></li>

    <% _.filter(products, function(product){ %>
        <%= return product category == value; %>

            <%= product.get('title') %>

            <% }); %> 
        <% }); %>

    <% }); %> 
<% }); %>

非常感谢!!!

Answer 1

对于简单过滤，请使用“where”：

var Products = Backbone.Collection.extend({});

var products = new Products(
    [ {"product_id": 1, "category": "CATEGORY1", "title": "Product 1", "price": 12},
    {"product_id": 2, "category": "CATEGORY1", "title": "Product 2", "price": 12},
    {"product_id": 3, "category": "CATEGORY1", "title": "Product 3", "price": 12},
    {"product_id": 4, "category": "CATEGORY2", "title": "Product 4", "price": 12},
    {"product_id": 5, "category": "CATEGORY2", "title": "Product 5", "price": 12} ]
);
var cat1 = products.where({'category': 'CATEGORY1' });

console.log(cat1);

每个类别的骨干过滤产品（过滤参数将是类别名称）

1 个答案: