將嵌套的JSON綁定到Knockout視圖模型

Question

我想從表示2d數組的JSON字符串中綁定KnockoutJS視圖模型。但是，我只遇到數組第一級顯示的問題。

我的模型看起來是這樣的：

function CategoriesModel(categories) { 
    var self = this; 

    self.categories = ko.observableArray(ko.utils.arrayMap(categories, function (category) { 
     return { 
      description: category.description, 
      checks: ko.observableArray(category.checks) 
     }; 
    })); 

    self.addCategory = function() { 
     self.categories.push({ 
      description: "", 
      checks: ko.observableArray() 
     }); 
    }; 

    self.removeCategory = function (category) { 
     self.categories.remove(category); 
    }; 

    self.addCheck = function (category) { 
     category.checks.push({ 
      description: "", 
      keypoint: "", 
      penaltypoints: "" 
     }); 
    }; 

    self.removeCheck = function (check) { 
     $.each(self.categories(), function() { 
      this.checks.remove(check) 
     }); 
    }; 

    self.save = function() { 
     self.lastSavedJson(JSON.stringify(ko.toJS(self.categories), null, 2)); 
    }; 

    self.lastSavedJson = ko.observable(""); 
}; 

在那裏我試圖綁定JSON數據的方法是：

function loadData() { 
    var rawJSON = '[ 
     { 
      "description":"01", 
      "checks":{" 
        description":"01", 
        "keypoint":"01", 
        "penaltypoints":"01" 
      } 
     },{ 
      "description":"02", 
      "checks":{ 
        "description":"02", 
        "keypoint":"02", 
        "penaltypoints":"02" 
      } 
     } 
    ]'; 

    var parsedJSON = JSON.parse(rawJSON); 

    viewModel.categories = ko.mapping.fromJSON(rawJSON); 

    ko.applyBindings(viewModel); 
} 

誰能告訴我我的錯誤是什麼？任何幫助將不勝感激。

編輯： 我試圖創建一個jsfiddle（http://jsfiddle.net/EAu2E/4/），但似乎knockout.js和knockout-mapping.js資源沒有正確加載。

Answer 1

問題出在JSON字符串中。雖然http://jsonlint.com被顯示以下爲有效的字符串：

var rawJSON = '[ 
    { 
     "description":"01", 
     "checks":{" 
       description":"01", 
       "keypoint":"01", 
       "penaltypoints":"01" 
     } 
    },{ 
     "description":"02", 
     "checks":{ 
       "description":"02", 
       "keypoint":"02", 
       "penaltypoints":"02" 
     } 
    } 
]'; 

淘汰賽JS期待各地的嵌套列表方括號（這也有效的JSON），像這樣：

var rawJSON = '[ 
    { 
     "description":"01", 
     "checks":[{" //<----- Square bracket required here. 
       description":"01", 
       "keypoint":"01", 
       "penaltypoints":"01" 
     }] //<----- Square bracket required here. 
    },{ 
     "description":"02", 
     "checks":[{ //<----- Square bracket required here. 
       "description":"02", 
       "keypoint":"02", 
       "penaltypoints":"02" 
     }] //<------ Square bracket required here. 
    } 
]';