最近的Select2升级似乎打破了我的一些淘汰赛绑定,我现在无法完全选择正确显示选项。破坏的select选项旨在基于可观察数组books
进行更新,并设置可观察的book
。我可以看到bindingHandler.update
被调用,并且valueAcessor中存在选项数据,但页面上没有任何更新。
HTML
<select name="book_choice" id="book_selector" class="form-control input-sm"
data-bind="
select2: {
value: book,
options: function(){return {results: books(), text:'id'}},
optionsText: bookFormat,
optionsValue: bookFormat,
placeholder:'-- Select Book --'
}
"
></select>
JS
ko.bindingHandlers.select2 = {
init: function(el, valueAccessor, allBindingsAccessor) {
var allBindings = allBindingsAccessor();
var select2 = ko.utils.unwrapObservable(allBindings.select2);
ko.utils.domNodeDisposal.addDisposeCallback(el, function() {
$(el).select2('destroy');
});
$(el).select2(select2);
// update select2 if value is set elsewhere
select2.value.subscribe(function(newValue){
if (newValue){
$(el).val(newValue.id);
}
});
$(el).on("select2:select", function(event){
var allBindings = allBindingsAccessor();
if (event.choice){
allBindings.select2.value(event.choice);
}
});
},
update: function(el, valueAccessor, allBindings, viewModel, bindingContext) {
var obj = valueAccessor();
$(el).select2("data", obj.options());
console.log(obj.options());
if (_.contains(obj.options().results, obj.value())){
$(el).val(obj.value().id);
}else{
obj.value(null);
}
$(el).prop('disable', !obj.options().results.length > 0);
$(el).trigger('change');
}
};
我尝试了很多不同的修复程序,但这与v4升级之前的代码非常相似。
答案 0 :(得分:0)
这是我的select2 binding.my情况在模态对话框中使用select2。
init: function (el, valueAccessor, allBindingsAccessor, viewModel) {
var bindingId = "#" + valueAccessor() + "";
var value = allBindingsAccessor().value;
ko.utils.domNodeDisposal.addDisposeCallback(el, function () {
$(el).select2('destroy');
});
// $("#myModalCreate")
$(el).select2({
dropdownParent: $(bindingId),
width: '100%'
});
// update select2 if value is set elsewhere
value.subscribe(function (newValue) {
if (newValue != undefined) {
$(el).val(newValue).trigger('change');
}
});
},
update: function (el, valueAccessor, allBindingsAccessor, viewModel) {
var value = valueAccessor();
var valueUnwrapped = ko.utils.unwrapObservable(value);
$(el).val(valueUnwrapped).trigger('change');
}
用法:
<select data-bind="select2: 'myModalCreate',options: $root.departmentGroup, optionsText: 'Text', optionsValue: 'Value', value: DepartmentGroup" class="col-xs-12 "></select>
DepartmentGroup是可观察的。
$ root.departmentGroup是observableArray(),如:
self.departmentGroup = ko.observableArray(JSON.parse('[{"Value": 0, "Text": "Retail"},{"Value": 1, "Text": "Demonstrator"}]'))
希望这对你有帮助!