将基因剔除视图模型拆分为多个文件 [英] Splitting knockout view model into multiple files

问题描述

我的视图模型开始变得很大，因此我决定将其拆分为多个文件.我已经尝试了许多不同的方法，但是没有任何效果.

My view model started getting very large so I decided to split it into multiple files. I have already tried many different approaches but nothing was working.

我的视图模型如下:

namespace.model = function(constructorParam) {
    var self = this;

    self.param1 = ko.observable(constructorParam.param1);
    self.param2 = ko.observable(privateFunction(constructorParam));

    self.clickEvent = function() {
        // do something with params
        // call some private funcitons
        privateFunction2(self.param2);
    };

    function privateFunction(param) {
        // do some stuff
    }

    function privateFunction2(param) {
        // do some stuff
    }
};

我需要跨多个文件访问私有函数和可观察的参数.我的最终模型应如下所示:

I need to access private functions and observable parameters across multiple files. My final model should look like this:

// file 1 
// contains constructor and param initialization + many common private helper funcitons
namespace.model = function(constructorParam) {
    var self = this;

    self.param1 = ko.observable(constructorParam.param1);
    self.param2 = ko.observable(privateFunction(constructorParam));

    function privateFunction(param) {
        // do some stuff
    }

    function privateFunction2(param) {
        // do some stuff
    }
};

// file 2
// contains event hendlers
self.clickEvent = function () {
    // i need to acces properties from namespace.model
    self.param1

    // call some private funcitons
    privateFunction2(self.param2);
};

// view model initialization
ko.applyBindings(new namespace.model(initValues));

是否可以通过淘汰赛实现类似目标? 谢谢

Is it possible to achieve something like this with knockout? Thanks

推荐答案

最后，我找到了一种方法

Finally I've found a way how to do it here. Here is a complete example:

<div>
    Name: <input data-bind="value: name" type="text" /> <br /> 
    Surname: <input data-bind="value: surname" type="text" /><br />
    Fullname: <span data-bind="text: fullName"></span><br />
    <button data-bind="click: showName">Show Name</button>
</div>

<script>

    Function.prototype.computed = function () {
        this.isComputed = true;
        return this;
    };

    Object.prototype.makeComputeds = function () {
        for (var prop in this) {
            if (this[prop] && this[prop].isComputed) {
                this[prop] = ko.computed(this[prop], this, { deferEvaluation: true });
            }
        }
    };
    // file 1
    var namespace = namespace || {};

    namespace.model = function (params)
    {
        var self = this;

        self.name = ko.observable(params.name);
        self.surname = ko.observable(params.surname);

        self.makeComputeds();
    };

    // file 2
    (function () {
        function showFullName(fullName) {
            alert(fullName);
        }

        ko.utils.extend(namespace.model.prototype, {

            showName: function() {
                showFullName(this.fullName());
            },
            // computed observable
            fullName: function() {
              return this.name() + " " + this.surname();
            }.computed()

        });

    })();

    ko.applyBindings(new namespace.model({ name: "My Name", surname: "My Surname" }));

</script>

编辑

有一个名为 Durandal 的项目，该项目结合了RequireJS和KnockoutJS.值得一看的是，您是否对KnockoutJS的SPA架构最佳实践感兴趣.

There is a project called Durandal which combines RequireJS and KnockoutJS. Worth to look if you are interested in SPA architecture best practices for KnockoutJS.

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