在骨干/ RequireJS嵌套列表循环依赖 [英] Circular Dependency in Backbone / RequireJS Nested List

问题描述

我设立在骨干嵌套类结构RequireJS。

I'm setting up a nested categories structure in Backbone with RequireJS.

在这种结构中，一个类别集合包含类别的模型，和一个单一的类模型可以包含一个类别集。

In this structure, a categories collection contains category models, and a single category model can contain a categories collection.

不幸的是，这似乎引起RequireJS可怕的循环依赖问题。我已阅读RequireJS的文档（ http://requirejs.org/docs/api.html#circular ）然而，我发现用'A'和'b'混淆。

Unfortunately this seems to cause the dreaded circular dependencies problem in RequireJS. I have read the docs on RequireJS (http://requirejs.org/docs/api.html#circular) however I am finding the explanation with 'a' and 'b' confusing.

下面是我的code，这是造成问题：

Here is my code, which is causing the problem:

define([

    "jquery",
    "underscore",
    "backbone",
    "collections/categories"

    ], function( $, _, Backbone, CategoriesCollection ) {

    var Category = Backbone.Model.extend({

        defaults: {
            title: "Untitled"
        },

        parse: function(data) {
            this.children = new CategoriesCollection( data.children, {parse: true} );
            return _.omit( data, "children" );
        }

    });

    return Category;

});

...

define([

    "jquery",
    "underscore",
    "backbone",
    "models/category"

    ], function( $, _, Backbone, CategoryModel ) {

    var Categories = Backbone.Collection.extend({
        model: CategoryModel
    });

    return Categories;

});

我想知道如果任何人谁经历过这可以帮助引导我在正确的方向。

I am wondering if anyone who has experienced this before can help steer me in the right direction.

感谢（提前）的帮助，

推荐答案

您只需要使用要求集合再次当你需要它在模型中，由于集合最初的传球可以未定义：

You just need to use require the collection again when you need it in the model, as the Collection passing initially can be undefined:

define([

    "jquery",
    "underscore",
    "backbone",
    "collections/categories"

    ], function( $, _, Backbone, CategoriesCollection ) {

    var Category = Backbone.Model.extend({

        defaults: {
            title: "Untitled"
        },

        parse: function(data) { 
            if(!CategoriesCollection){
              CategoriesCollection = require("collections/categories");
            }

            this.children = new CategoriesCollection( data.children, {parse: true} );
            return _.omit( data, "children" );
        }

    });

    return Category;

});

在他们还导入例如要求，但它也应该没有进口。

In the example they import also require but it should also work without the import.

这篇关于在骨干/ RequireJS嵌套列表循环依赖的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！