タスクのリストを作成してから、タスクをクリックしてポップアップ形式で表示できるようにするために、初めてノックアウトjsを使用しています。私が抱えている問題は、ToDoListViewModel/edit を呼び出す data-bind="click: $parent.edit" にあります。
最初にリスト コードを書き始めたとき、現在の行の todo オブジェクトを最初のパラメーターとして edit 関数に渡します。追加/編集ポップアップ フォームに 2 番目のビュー モデルを追加した後、このように動作しなくなりました。$parent.edit を呼び出すと、引き続き edit 関数が呼び出されますが、空のオブジェクト { } が渡されるようになりました。
ある種の競合するバインディングの問題に遭遇しているようです。何かアイデアはありますか?
やることリストのHTMLは次のとおりです。
<table class="table table-striped table-hover" data-bind="visible: isVisible">
<thead>
<tr>
<th>To-Do</th>
<th>Estimate</th>
<th>Deadline</th>
@if (Model == null) { <th>Property</th> }
<th>Tenant</th>
<th style="display: none;">Assigned To</th>
<th></th>
</tr>
</thead>
<tbody data-bind="foreach: todos">
<tr data-bind="visible: isVisible()">
<td><a class="pointer" title="Edit To-Do" data-bind="click: $parent.edit, text: Task"></a></td>
<td data-bind="text: FormattedAmount"></td>
<td data-bind="text: FormattedDueDate"></td>
<td data-bind="visible: $parent.showPropertyColumn, text: PropertyName"></td>
<td data-bind="text: TenantName"></td>
<td>
<div class="btn-group pull-right">
<a class="btn btn-primary pointer default-click-action" data-bind="click: $parent.markComplete">Mark Complete</a>
<button class="btn btn-primary dropdown-toggle" data-toggle="dropdown"><span class="caret"></span></button>
<ul class="dropdown-menu">
<li><a class="pointer" data-bind="click: $parent.edit">Edit To-Do</a></li>
<li><a class="pointer" data-bind="click: $parent.remove">Delete To-Do</a></li>
</ul>
</div>
</td>
</tr>
</tbody>
</table>
そして、ここにポップアップhtmlがあります：
@model Housters.Schemas.Models.Property.Listing
<div id="popup" class="modal fade" style="display: none;" data-bind="with: form">
@using (Html.BeginForm("SaveTodo", "Properties", FormMethod.Post, new { Id = "form", @class = "form-horizontal" }))
{
<div class="modal-header">
<a class="close" data-dismiss="modal">×</a>
<h3>To-Do Information</h3>
</div>
<div class="modal-body">
<input id="id" name="id" type="hidden" data-bind="value: todo().Id" />
<input id="originalListingId" type="hidden" value="@(Model != null ? Model.IdString : "")" />
<div class="control-group @(Model != null ? " hide" : "")">
<label class="control-label" for="listingId">Property</label>
<div class="controls">
@Html.DropDownList("listingId", ViewBag.Listings as SelectList, "None",
new Dictionary<string, Object> { { "data-bind", "value: todo().ListingId" } })
</div>
</div>
<div class="control-group">
<label class="control-label" for="tenantId">Tenant</label>
<div class="controls">
<select id="tenantId" name="tenantId" class="span11" data-bind="value: todo().TenantId">
<option value="">None</option>
</select>
<p class="help-block">Is this task related to a certain tenant?</p>
</div>
</div>
<div class="control-group">
<label class="control-label" for="amount">Estimate to Complete</label>
<div class="controls">
<div class="input-prepend"><span class="add-on">$</span><input type="text" id="amount" name="todo.Amount" maxlength="10"
class="span11 number" data-bind="value: todo().Amount" /></div>
</div>
</div>
<div class="control-group">
<label class="control-label" for="dueDate">Due Date</label>
<div class="controls">
<input type="text" id="dueDate" name="todo.DueDate" maxlength="10"
class="span11 date" data-bind="value: todo().DueDate" />
</div>
</div>
<div class="control-group">
<label class="control-label" for="task">Task<span class="required-asterisk">*</span></label>
<div class="controls">
<textarea id="task" name="todo.Task" rows="4" class="span11 required" data-bind="value: todo().Task"></textarea>
</div>
</div>
</div>
<div class="modal-footer">
<a class="btn pointer" data-dismiss="modal">Close</a>
<a id="mark-complete-popup" class="btn btn-primary" data-dismiss="modal" data-bind="visible: (todo().Id && !todo().IsComplete), click: markComplete">Mark Complete</a>
<button type="button" class="btn btn-primary" data-bind="click: save">Save</button>
</div>
}
</div>
最後に、ビュー モデルを定義する JavaScript を次に示します。
function ToDoList () {
if(!(this instanceof arguments.callee))
return new arguments.callee();
var parent = this;
this.showCompleted = ko.observable(false);
this.tenantFilter = new PropertyTenantFilter();
this.viewModel = {
list: new ToDoListViewModel(),
form: new ToDoFormViewModel()
};
this.init = function () {
//get all tenants.
utils.block($("#grid-content"), "Loading");
this.tenantFilter.init(function () {
//initialize view model.
ko.applyBindings(this.viewModel);
//setup controls & events.
$("#dueDate").datepicker();
$("#listingId").change(this.tenantFilter.getByListing.bind(this.tenantFilter)).change();
} .bind(this));
};
function ToDoListViewModel() {
//init.
var self = this;
self.todos = ko.observableArray([]);
//computed.
self.showPropertyColumn = ko.computed(function () {
return $("#originalListingId").val().length == 0;
});
self.isVisible = ko.computed(function () {
return _.find(self.todos(), function (todo) { return todo.isVisible(); }) != null;
});
//operations.
self.add = function () {
//set form field values.
parent.viewModel.form.fill(new schemas.ToDo({}, parent));
//show popup.
$("#popup").modal("show");
};
self.edit = function (todo) {
console.debug("edit: " + JSON.stringify(todo));
//set form field values.
parent.viewModel.form.fill(todo);
//update tenants dropdown for selected listing.
parent.tenantFilter.getByListing();
//show popup.
$("#popup").modal("show");
};
self.markComplete = function (todo) {
parent.markComplete(todo);
};
self.remove = function (todo) {
var result = confirm("Are you sure that you want to delete this To-Do?");
if (result) {
//save changes.
utils.ajax(basePath + "properties/deletetodo",
{ id: todo.Id },
function (success) {
//refresh results.
self.todos.remove(todo);
//show result.
utils.showSuccess('The To-Do has been deleted successfully');
}
);
}
};
self.toggleShowCompleted = function () {
parent.showCompleted(!parent.showCompleted());
$("#showCompletedTodos").text(parent.showCompleted() ? "Show Active" : "Show Completed");
};
self.update = function (todo) {
var existingToDo = _.find(self.todos(), function (item) { return item.Id() == todo.Id(); });
existingToDo = todo;
};
//load todos from server.
utils.ajax(basePath + "properties/gettodos",
{ id: $("#originalListingId").val(), showCompleted: parent.showCompleted() },
function (results) {
var mappedTodos = $.map(results, function (item) { return new schemas.ToDo(item, parent); });
self.todos(mappedTodos);
$("#grid-content").unblock();
}
);
}
function ToDoFormViewModel() {
//init.
var self = this;
self.todo = ko.observable({});
utils.setupPopupForm(self.saved);
//operations.
self.fill = function (todo, isEdit) {
//set form field values.
self.todo = todo;
if (todo.Id()) {
//update tenants dropdown for selected listing.
parent.tenantFilter.getByListing();
}
//show popup.
$("#popup").modal("show");
};
self.save = function (todo) {
self.todo = todo;
$("#form").submit();
};
self.saved = function (result) {
var todo = new schemas.ToDo(result.todo, parent);
if (result.isInsert)
parent.viewModel.list.todos().push(todo);
else
parent.viewModel.list.update(todo);
utils.showSuccess("Your To-Do has been saved successfully.");
};
self.markComplete = function (todo) {
parent.markComplete(todo);
};
}
this.markComplete = function (todo) {
var result = confirm("Are you sure that you want to mark this To-Do complete?");
if (result) {
//save changes.
utils.ajax(basePath + "properties/marktodocomplete", {
id: todo.Id()
},
function () {
todo.IsComplete(true);
//show success.
utils.showSuccess('Your To-Do has been marked completed');
} .bind(this)
);
}
}
this.init();
}