使用knockout.validation和knockout.mapping with require.js时，knockout subscribe不起作用

Question

所以我测试了一下，发现当我以这种方式设置代码时，订阅函数永远不会被调用：

app.index.js

requirejs.config({
    "baseUrl": "/Scripts/app/item/",
    "paths": {
        "jquery": "//code.jquery.com/jquery-2.0.3.min",
        "toastr": "/Scripts/lib/toastr",
        "moment": "/Scripts/lib/moment",
        "fu": "/Scripts/lib/jquery.fineuploader-3.8.0",
        "ko": "//cdnjs.cloudflare.com/ajax/libs/knockout/3.0.0/knockout-min",
        "knockout.validation": "/Scripts/lib/knockout.validation",
        "mapping": "/Scripts/lib/knockout.mapping-latest.debug",
        "timeentry": "/Scripts/lib/jquery.timeentry.min",
        "model.obj": "../models/model.obj",
        "timecollection.kobindings":"/Scripts/lib/koBindings/timecollection.kobindings"
    },
    shim: {
        "knockout.validation": ["ko"],
        "mapping": ["ko"]
    }
});


require(["ko"], function (ko) {
    //manually set the global ko property
    window.ko = ko;

    //then bring in knockout validation
    require(["knockout.validation"], function () {
        ko.validation.configure({
            insertMessages: false,
            decorateElement: true,
            errorElementClass: 'error'
        });
        require(["main.index"], function (bs) {
            bs.run();
        });
    });
});

main.index.js

define(['jquery',
        'ko',
        'mapping',
        'indexViewModel',
        'model.obj'],
   function ($, ko, mapping, indexViewModel, obj) {
       var
           run = function () {
               var vm = new indexViewModel();
               var array = [];
               $.getJSON("/api/GetData/", function (data) {
                        mapping.fromJS(val.ObjCollection, {
                               create: function (options) {
                                   return new Obj(options.data);
                               }
                           }, vm.ObjCollection);

               }).done(function(){
                   ko.applyBindings(vm, document.getElementById('#view'));
               });
           };
       return {
           run: run
       };
   });

Model.js

define('model.obj', ['ko', 'moment'], function (ko, moment) {
    var Obj= function (data) {
        var self = this;
        self.Id = data.Id;
        self.Property = ko.observable(data.Property);

        self.Property .subscribe(function () {
            console.log('in here');
        }, self);    
};
    return Obj;
});

如果我删除此代码：

require(["ko"], function (ko) {
        //manually set the global ko property
        window.ko = ko;

        //then bring in knockout validation
        require(["knockout.validation"], function () {
            ko.validation.configure({
                insertMessages: false,
                decorateElement: true,
                errorElementClass: 'error'
            });
            require(["main.index"], function (bs) {
                bs.run();
            });
        });
    });

然后就这样离开：

require(["main.index"], function (bs) {
                    bs.run();
                });

订阅功能会显示console.log，但是使用代码，订阅永远不会被调用。

Answer 1

您的代码中存在语法错误：

function ($, ko, mapping, indexViewModel, obj) {
   var
       run = function () {
           var vm = new indexViewModel();
           var array = [];
           $.getJSON("/api/GetData/", function (data) {
                    mapping.fromJS(val.ObjCollection, {
                           create: function (options) {
                               return new Obj(options.data);
                           }
                       }, vm.ObjCollection);

注意到你'返回新的Obj'（带资本），但是模块作为'obj'注入函数（没有资本）。这可以解释为什么你永远不会到达那里（虽然它没有解释为什么淘汰验证与它有任何关系）。

如果这对您没有帮助，请在代码的各个部分放置一些断点，然后单步执行。查看问题出现的位置。整个部分永远不会被触发，还是仅仅是未触发的订阅？为什么你期望订阅回调首先触发？您首先设置值，然后订阅，但如果您再也不更新该值，则回调永远不会触发。