javascript - MVC4 ModelState 属性名称到 JSON 或 Array

Question

我正在使用序列化为 JSON 的复杂对象图，通过 MVC4/jQuery/Sammy/Rivets 实现 SPA 功能。

我有一个对象图，在序列化为 JSON 时看起来有点像这样(显然是模型):

model = 
    { 
        Name: "Me",
        Age: 22,
        Hobbies: 
            [ 
                { Name: "Biking", IsActive: true },
                { Name: "Programming", IsActive: true } 
            ]
    }

在我需要非侵入式验证之前，一切都运行良好，因为我的爱好在 SlickGrid 中，并且我自己管理所有数据。为了处理这个问题，我在模型旁边返回了我的 ModelState 和我的 JSON。

return JSON(new { model = model, modelState = this.ModelState });

从那里我打算遍历 modelState 并使用一些自定义函数将错误分配到正确的位置，但是有一个问题。

模型状态看起来像这样:

"Name",
"Age",
"Hobbies[0].Name",
"Hobbies[0].IsActive",
"Hobbies[1].Name",
"Hobbies[1].IsActive"

我需要将 [0] 分离到一个对象中，将 [1] 分离到它们自己的对象中，这样我就可以顺利地获取值。当我开始考虑复杂对象数组的第三层时，这让我感到困惑。

解决方案:

var ModelStateConverter = function ($, module) {
    module = module || {};

    // Convert The ModelState form style object to a standard JS object structure.
    module.toObject = function (modelState) {
        var ModelState = {};

        $.each(modelState, function (key, value) {
            AssignValuesToObjectStore(key, ModelState, value);
        });

        return ModelState;
    }

    // item is the full identifier ex. "Hobbies[0].Name"
    // store is the object we are going to throw arrays, objects, and values into.
    // value is the error message we want to get in the right place.
    // index is an internal processing parameter for arrays only, setting it's value has no effect.
    function AssignValuesToObjectStore(item, store, value, index) {
        var periodMatch = item.match(/[\.]/);

        if (periodMatch === null) {
            if (Array.isArray(store)) {
                if (store[index] === undefined) {
                    store[index] = {};
                }

                store[index][item] = value;
            }
            else {
                 store[item] = value;
            }
        }
        else {
            // This wasn't a simple property or end of chain.

            var currentProperty = item.slice(0, periodMatch.index); // Get our property name up to the first period.
            var container = {}; // We assume we are dealing with an object unless proven to be an array.
            var arrayIndex; // This is irrelevant unless we have an array.

            if (currentProperty.slice(-1, currentProperty.length) === "]") {

                // We are dealing with an array! Hoo Ray?!
                arrayIndex = parseInt(currentProperty.slice(currentProperty.indexOf("[") + 1, currentProperty.indexOf("]")));

                currentProperty = currentProperty.slice(0, currentProperty.indexOf("[")); // remove the indexer ex. [0] so we are left with the real name

                container = []; // We know we need an array instead;
            }

            if (store[currentProperty] === undefined) {
                store[currentProperty] = container; // If this property isn't already created, then do so now.
            }

            //Recurseive nature here.
            AssignValuesToObjectStore(item.slice(periodMatch.index + 1, item.length), store[currentProperty], value, arrayIndex);
        }
    }

    return module;
}($, ModelStateConverter);

您可以从以下位置调用它:

ModelStateConverter.toObject(data.modelState);

假设 data.modelState 是来自服务器的 ModelState。

Answer 1

你可以试试像 JSON.NET 这样的库, 或类 JavaScriptSerializer , 序列化 ModelState。