使用Hot Towel API在数据库驱动的页面上敲除数据绑定失败

时间:2014-04-28 10:26:53

标签: jquery http knockout.js hottowel

我在设置敲除数据绑定到动态生成的输入字段时遇到问题。快速浏览canActivate(id),我可以获得页面上所需的所有对象的详细信息,并将其存储在vm.OPCLayoutVm中。

var title = 'User Information';
var vm = {

    canActivate: canActivate,
    attached: attached,
    title: title,
    OPCLayoutVm: null,
    UserInformationVm: ko.observable({}),
    UserId:null
};

return vm;

function canActivate(userId) {
    var dfd = $.Deferred();

    vm.userId = userId.patientId;
    if (userID != null) {
        $.getJSON('CoreData/GetCoreData').done(function(data) {
            vm.OPCLayoutVm = buildViewModel(data);
            return dfd.resolve(true);
        }).fail(function(e) {
            logger.logError('Couldn\'t load core layout', e, 'user-information', true);
            return dfd.resolve(false);
        });
    } else {
        return dfd.resolve(true);
    }

    return dfd;
}

function buildViewModel(data) {
    var data_response = data.result;

    return data_response;
}

然后,一旦页面加载,我填充动态字段,如果需要额外数据,请发送JSON请求以获取它,然后将其存储为vm.UserInformationVm中的新对象

function attached() {
   fnCreateInformationPageStructure();
}

function fnCreateInformationPageStructure() {

    //Send json request to get all objects
    // go through all objects and create them
    // however on specific objects where data is already present send off another json request to get it...

     // add binding details to dynamic object
     $(inputDiv).find('input')[0].setAttribute("data-bind", "value: vm.UserInformationVm." + (matching data name to the json returned data below) + ".data");
     //request data and add to vm.UserInformationVm
     if (dataItem.DatabaseTableName != null && dataItem.TableFieldName != null) {
         $.getJSON("CoreData/GetObjectData?id=" + vm.UserId + '&tableName=' + dataItem.DatabaseTableName + '&columnName=' + dataItem.TableFieldName).done(function (result) {
         extendObject(vm.UserInformationVm, [result.result[0].column, new DataBindObject(result.result[0].data,result.result[0].columnName,result.result[0].tableName)]);

         });
     }
}

// Other used function 
function extendObject(obj, props) {
    for (var i = 0; i < props.length; i+=2)
    obj[props[i]] = props[i+1];
}

function DataBindObject(dataitem, columnName, tableName) {
    this.data = ko.observable(dataitem);
    this.column = columnName;
    this.table = tableName;
}

然而,正如我所期望的那样运行所有内容,带有data-bind的输入字段只是不想在vm.UserInformationVm。(相关对象)中显示数据。

有什么想法吗?

-Update-

UserInformationvm的当前数据结构看起来像......

 -UserInformationVm
     -userForename (dynamically generated)
     -userSurname  (dynamically generated)
         -data  (ko.observable)
         -table
         -column

1 个答案:

答案 0 :(得分:0)

修改 你的PatientInformationVm应该是一个可观察对象,不应该吗?

然后,您将使用

替换您的extendObject函数
function extendObject(obj, props) {
    for (var i = 0; i < props.length; i+=2)
        if (ko.isObservable(obj[props[i]]))
            obj[props[i]](props[i+1]);
        else
            obj[props[i]] = props[i+1];
    if (ko.isObservable(obj)) obj.valueHasMutated();
}