我正根据John Papa的Jumpstart提供的指导建立SPA。 当我创建模型时，它有
modelObservable（）。entityAspect.entityState.isAdded（）= true;
我更新了文字，下拉列表和 modelObservable（）。entityAspect.entityState.isAdded（）= false;
在我的Datacontext中：
var createProject = function (position) {
return manager.createEntity(entityNames.project,
{
positionId : position.id(),
start : position.start(),
memberId : position.memberId()
});
};
从我的添加viewModel：
调用 define(['services/datacontext', 'durandal/plugins/router', 'durandal/system', 'durandal/app', 'services/logger', 'services/uiService'],
function (datacontext, router, system, app, logger, ui) {
var model = ko.observable();
var position = ko.observable();
var hourTypes = ko.observableArray([]);
var isSaving = ko.observable(false);
// init
var activate = function (routeData) {
logger.log('Add View Activated', null, 'add', true);
var positionId = parseInt(routeData.id);
initLookups();
return datacontext.getPositionById(positionId, position).then(**createProject**);
};
var initLookups = function () {
logger.log('initLookups', null, 'add', true);
hourTypes(datacontext.lookups.hourTypes);
};
// state
**var createProject = function () {
return model(datacontext.createProject(position()));
}**
var addNewProject = function () {
if (position == undefined || position().id() < 1) {
console.log('callback addNewProject');
setTimeout(function () {
addNewProject();
}, 1000);
} else {
datacontext.addProject(position(), model);
console.log(model().id());
return;
}
}
var **save** = function () {
isSaving(true);
**datacontext.saveChanges()**
.then(goToEditView).fin(complete);
function complete() {
isSaving(false);
}
function goToEditView() {
isSaving(false);
var url = '#/Projects/';
router.navigateTo(url + model().id());
}
};
var vm = {
activate: activate,
hourTypes: hourTypes,
isAdded: isAdded,
model: model,
save: save,
title: 'Details View'
};
return vm;
});
html
<section data-bind="with:model">
<h1 data-bind="text: name"> <i class="icon-asterisk" data-bind="visible: hasChanges" style="font-size: 30px;"></i></h1>
<div class="errorPanel"></div>
<div id="overview" class="project" >
<div class="row">
<div class="span4">
<label class="requiredLabel">Name*</label>
<input type="text" name="name" data-bind="value: name" style="width: 27em;" class="required" placeholder="Project Name" required validationMessage="Project Name required" /><span class="k-invalid-msg" data-for="title"></span>
</div>
</div>
<div class="row">
<div class="span3"><label class="requiredLabel">Start*</label></div>
<div class="span3"><label class="requiredLabel">End</label></div>
</div>
<div class="row">
<div class="span3"><input name="start" data-bind="shortDate: start" class="date required" required="required" placeholder="mm/dd/yyyy" style=" width:142px"></div>
<div class="span3"><input name="end" data-bind="shortDate: end" class="date" placeholder="mm/dd/yyyy" style=" width:142px"><span class="k-invalid-msg" data-for="end"></span></div>
</div>
<br/>
<div class="row">
<div class="span3"><label for="hourType" class="requiredLabel">Measure As*</label></div>
<div class="span2"><label for="hoursPerWeek" class="requiredLabel">Hours/Week</label></div>
<div class="span2"><label for="totalHours" class="requiredLabel">Total Hours</label></div>
</div>
<div class="row">
<div class="span3">
<select id="hourType" data-bind="options: $parent.hourTypes, optionsText: 'name', value: hourType" required validationMessage="Measure As required"></select><span class="k-invalid-msg" data-for="hourType"></span>
</div>
<div class="span2">
<input name="hoursPerWeek" type="number" min="1" max="120" required="required" data-bind="value: hoursPerWeek, validationOptions: { errorElementClass: 'input-validation-error' }, enable: hourType().id() == 1" class="hours required"" style="width: 80px;" validationMessage="Hours required"><span class="k-invalid-msg" data-for="projectHours"></span>
<span class="k-invalid-msg" data-for="totalHours"></span>
</div>
<div class="span2">
<input name="totalHours" type="number" min="40" max="2080" required="required" data-bind="value: totalHours, validationOptions: { errorElementClass: 'input-validation-error' }, enable: hourType().id() == 2" class="hours required"" style="width: 80px;" validationMessage="Hours required"><span class="k-invalid-msg" data-for="projectHours"></span>
<span class="k-invalid-msg" data-for="totalHours"></span>
</div>
</div>
<div class="row">
<div class="span4">
<label class="requiredLabel">Description*</label><span class="k-invalid-msg" data-for="description"></span><span id="posMinDesc" style="visibility:hidden"></span>
<textarea id="description" name="description" style="height: 200px; width: 650px;" data-bind="value: description, enabled:true, click: $parent.clearDefaults" rows="4" cols="60" class="richTextEditor k-textbox" required validationMessage="Description required" ></textarea>
</div>
</div>
</div>
<div class="button-bar">
<button class="btn btn-info" data-bind="click: $parent.goBack"><i class="icon-hand-left"></i> Back</button>
<button class="btn btn-info" data-bind="click: $parent.save, enable: $parent.canSave"><i class="icon-save"></i> Save</button>
</div>
</section>
json微风发送给我的控制器：
{ “实体”：[ { “Id”：-1， “描述”：“poi”， “结束”：null， “Gauge”：0， “得分”：0， “HourTypeId”：1， “HoursPerWeek”：45， “HourlyRate”：null， “TotalHours”：null， “WeightedHours”：0， “CreditMinutes”：0， “TotalCompensation”：null， “IsCurrent”：假， “名字”：“poi”， “PositionId”：1， “MemberId”：1， “开始”：“2011-09-01T00：00：00Z”， “undefined”：false， “entityAspect”：{ “entityTypeName”：“Project：＃SkillTraxx.Model”， “defaultResourceName”：“项目”， “entityState”：“已修改”， “originalValuesMap”：{ “名称”： ””， “HourTypeId”：0， “HoursPerWeek”：null， “描述”：“” }， “autoGeneratedKey”：{ “propertyName”：“Id”， “autoGeneratedKeyType”：“身份” } } } ] “saveOptions”：{} }
如您所见，以上是不正确的b / c状态是“已修改”且Id = -1。这会引发错误服务器端。我想我可以捕获DbUpdateConcurrencyException，展开JObject并将“Modified”更改为添加，但是它的代码闻到了它。
如果有人能帮助我找到所有这些的面孔时刻，我已经准备好了。 谢谢你的期待！
答案 0 :(得分：1)
FACE PALMED IT 我接受了Jays的建议并开始剥离html然后我意识到这是我的处理程序。 shortDate处理程序的更新方法负责。我将它包装在if语句中，如果添加了当前状态，则不发送更新。
ko.bindingHandlers.shortDate = {
init: function (element, valueAccessor) {
//attach an event handler to our dom element to handle user input
element.onchange = function () {
var value = valueAccessor();//get our observable
//set our observable to the parsed date from the input
value(moment(element.value).toDate());
};
},
update: function (element, valueAccessor, allBindingsAccessor, viewModel) {
var value = valueAccessor();
var valueUnwrapped = ko.utils.unwrapObservable(value);
if (valueUnwrapped) {
element.value = moment(valueUnwrapped).format('L');
if (!viewModel.entityAspect.entityState.isAdded())
{
**viewModel.entityAspect.setModified();**
}
}
}
};