Knockout.js自动完成绑定处理程序[已关闭]

我正在尝试Knockout.js的自动完成处理程序,我正在寻找一些反馈。这目前是可行的,但我正在尝试看看我是否可以在没有那么多Eval()的情况下完成这项工作,为了可重用性,看看是否有一种方法可以引用ViewModel,而不必假设它被命名为“vm”,如下所示。

用法:

<input placeholder="Test..." type="search" data-bind="autoComplete:$root.persons, source:'/api/Person/', parameterName:'searchString', labelKey:'displayName', valueKey:'urid', onSelected:'addPerson'" autocomplete="off" />

JS:

ko.bindingHandlers.autoComplete = {
    init: function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
        var postUrl = allBindingsAccessor().source; // url to post to is read here
        var param = allBindingsAccessor().parameterName;
        var labelKeyName = allBindingsAccessor().labelKey;
        var valueKeyName = allBindingsAccessor().valueKey;
        var selectedFunction = allBindingsAccessor().onSelected;
        var selectedObservableArrayInViewModel = valueAccessor();

        $(element).autocomplete({
            minLength: 2,
            autoFocus: true,
            source: function (request, response) {
                $.ajax({
                    url: param != null ? postUrl : postUrl + request.term,
                    data: param == null ? '' : param + "=" + request.term,
                    dataType: "json",
                    type: "GET",
                    success: function (data) {
                        response($.map
                            (data, function (obj) {
                                return {
                                    label: eval("obj." + labelKeyName),
                                    value: eval("obj." + valueKeyName)
                                };
                            }));
                    }
                });
            },
            select: function (event, ui) {
                if (selectedFunction != null) {
                    var functionCall = 'vm.' + selectedFunction + "(event, ui)";
                    eval(functionCall);
                }
            }
        });
    }
};