Breezejs flips the EntityState from Added to Modified before Save - breeze

Question

I am building a SPA per the guidance provided in John Papa's Jumpstart.
When I create the model, it has
modelObservable().entityAspect.entityState.isAdded() = true;
I update the text, dropdown and
modelObservable().entityAspect.entityState.isAdded() = false;
in my Datacontext:
var createProject = function (position) {
return manager.createEntity(entityNames.project,
{
positionId : position.id(),
start : position.start(),
memberId : position.memberId()
});
};
which is called from my add viewModel:
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;
});
the 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>
The json breeze sends to my controller is this:
{
"entities": [
{
"Id": -1,
"Description": "poi",
"End": null,
"Gauge": 0,
"Score": 0,
"HourTypeId": 1,
"HoursPerWeek": 45,
"HourlyRate": null,
"TotalHours": null,
"WeightedHours": 0,
"CreditMinutes": 0,
"TotalCompensation": null,
"IsCurrent": false,
"Name": "poi",
"PositionId": 1,
"MemberId": 1,
"Start": "2011-09-01T00:00:00Z",
"undefined": false,
"entityAspect": {
"entityTypeName": "Project:#SkillTraxx.Model",
"defaultResourceName": "Projects",
"entityState": "Modified",
"originalValuesMap": {
"Name": "",
"HourTypeId": 0,
"HoursPerWeek": null,
"Description": ""
},
"autoGeneratedKey": {
"propertyName": "Id",
"autoGeneratedKeyType": "Identity"
}
}
}
],
"saveOptions": {}
}
As you can see, the above is incorrect b/c state is "Modified" and the Id = -1. This throws an error server side. I suppose I could trap the DbUpdateConcurrencyException, unwind the JObject and change "Modified" to added, but that's got code smell all over it.
If anyone can help me find the face-palm moment in all of this, I'm ready.
Thanks for looking!

Answer 1

FACE PALMED IT
I took Jays advice and started stripping away the html then I realize it was my handler.
The update method on shortDate handler was responsible. I wrapped it in an if statement not to send the update if the current state is added.
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();**
}
}
}
};