如何在 backbone.js 中保存一个集合或至少一部分

Question

I need to maintain the order of models in a collection that are in a model and be able to save it to the server.我需要维护 model 集合中模型的顺序，并能够将其保存到服务器。 I know I can save the individual models, but when I save the "parent model" that contains the collection the attribute holding the collection is now saved.我知道我可以保存单个模型，但是当我保存包含集合的“父模型”时，现在保存了包含集合的属性。

Is there a way to do this?有没有办法做到这一点？ Below is my code.下面是我的代码。 And I know it probably isn't the best, I am still learning.我知道这可能不是最好的，我还在学习。

<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="content-type" content="text/html;charset=UTF-8" />
    <script type="text/javascript" src="jquery.js"></script>
    <script type="text/javascript" src="jquery-ui.js"></script>
    <script type="text/javascript" src="json2.js"></script>
    <script type="text/javascript" src="underscore-min.js"></script>
    <script type="text/javascript" src="backbone-min.js"></script>
    <script type="text/javascript">
        $(function() {
            var WO = Backbone.Model.extend({
                wonum: null,
                part: null,
                desc: null,
                initialize: function()
                {
                    this.url = '/rest/wo/'+this.get('wonum');
                }
            });

            var WOView = Backbone.View.extend({
                tagName: "tr",
                className: "wo",
                initialize: function(options)
                {
                    this.render = _.bind(this.render, this);
                },
                render: function()
                {
                    $(this.el).html("<td>"+this.model.get('wonum')+"</td><td>"+this.model.get('part')+"</td><td>"+this.model.get('desc')+"</td>");
                    return this;
                }
            });


            var WOs = Backbone.Collection.extend({
                model: WO,
                url: '/rest/section/wos/'
            });

            var Section = Backbone.Model.extend({
                defaults: {
                    name : "Section"
                },
                wos: [],
                url: '/rest/section/',
                initialize: function()
                {
                    this.wos = new WOs();
                    this.wos.url += this.id;
                    this.url += this.id;
                }
            });

            var SectionView = Backbone.View.extend({
                tagName: "table",
                initialize: function()
                {
                    _(this).bindAll('add','remove');
                    var that = this;
                    this._woViews = [];

                    this.model.wos.each(this.add);

                    this.model.wos.bind('add', this.add);
                },
                add: function(woObj)
                {
                    var wov = new WOView({
                        model: woObj,
                        id: woObj.get('wonum')});
                    this._woViews.push(wov);
                    if(this._rendered)
                        $(this.el).append(wov.render().el);
                    this.model.save();
                },
                render: function()
                {
                    this._rendered = true;
                    var that = this;
                    $(this.el).empty();
                    $(this.el).append("<thead><th>WO</th><th>Part</th><th>Desc</th></thead>");
                    $(this.el).append("<tbody>");
                    _(this._woViews).each(function(wov)
                    {
                        $(that.el).append(wov.render().el);
                    });
                    $(this.el).append("</tbody>");
                    return this;
                }
            });

            var sec = new Section({id: 1});
            sec.wos.add({
                wonum: 1001,
                part: 'p1001',
                desc: 'd1001'});
            sec.wos.add({
                wonum: 1002,
                part: 'p1002',
                desc: 'd1002'});
            var secv = new SectionView({model: sec, id: sec.get('id')});
            $("body").append(secv.render().el);
            $("#addwo").bind("click",function()
            {
                secv.add(new WO({
                    wonum: 1005,
                    part: 'p1005',
                    desc: 'd1005'}));
            });
        });
    </script>
</head>
<body>
<button id='addwo'>Add WO</button>
</body>
</html>

Answer 1

I would consider using the Collection's comparator function (which you can set) to preserve the order of the collection.我会考虑使用集合的比较器 function （您可以设置）来保留集合的顺序。 This comparator would potentially use a property of the models;该比较器可能会使用模型的属性； so for instance, the model's name or even a position property.例如，模型的名称，甚至是 position 属性。

Using this approach, you would just save each model independently, but have the collection potentially refresh itself (where it would use the comparator to preserve the desired order).使用这种方法，您只需独立保存每个 model，但集合可能会自行刷新（它将使用比较器来保留所需的顺序）。

如何在 backbone.js 中保存一个集合或至少一部分

问题描述

1 个解决方案

解决方案1
1 已采纳 2011-07-03 20:37:57

如何在 backbone.js 中保存一个集合或至少一部分

问题描述

1 个解决方案

解决方案1 1 已采纳 2011-07-03 20:37:57

解决方案1
1 已采纳 2011-07-03 20:37:57