Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Getting KO'd

Posted on 2015-02-01
3
Medium Priority
?
161 Views
Last Modified: 2015-02-02
I recently completed a tutorial on using Knockout, Entity Framework and Ajax.
The tutorial works great. I followed everything step by step and it was great.

Now I am trying to apply the steps to my own solution. It is a "Code First, Existing Database" project and it will really only be used as an input application. The applicants won't need to edit or delete or view any data after submit.

I am getting a confusing error on the save function: 0x800a139e - JavaScript runtime error: Pass a function that returns the value of the ko.computed.


I believe I have done the knockout mapping, the controller save, and the Create view script references exactly as the course demonstrates.
The relevant code:
FamilyViewModel.js
FamilyViewModel = function (data) {
    var self = this;
    ko.mapping.fromJS(data, {}, self);
}

self.save = function(){
    $.ajax({
    url: "/Family/Save/",
    type: "POST",
    data: ko.toJSON(self),
    contentType: "application/json",
    success: function(data) {
        if(data.FamilyViewModel != null)
            ko.mapping.fromJS(data.FamilyViewModel, {}, self)
    }
});
}

Open in new window


The Save method
        public JsonResult Save(FamilyViewModel familyViewModel)
        {
            Families families = new Families();
            families.FamilyName = familyViewModel.FamilyName;
            families.PhoneNumber = familyViewModel.PhoneNumber;
            families.Email = familyViewModel.Email;
            families.Address1 = familyViewModel.Address1;
            families.Address2 = familyViewModel.Address2;
            families.City = familyViewModel.City;
            families.State = familyViewModel.State;
            families.ZipCode = familyViewModel.ZipCode;
            families.MyPreferedSite = familyViewModel.MyPreferedSite;
            families.FamilyIncome = familyViewModel.FamilyIncome;

            _familyContext.Families.Add(families);
            _familyContext.SaveChanges();

            familyViewModel.MessageToClient = string.Format("Thank you {0}. Your family profile has been created.", families.FamilyName);

            return Json(new {familyViewModel});

        }

Open in new window


The Create.cshtml page
@model FamilyProfile.Web.ViewModels.FamilyViewModel
@using System.Web.Script.Serialization

@{
    ViewBag.Title = "Create Family Profile";
}

@{ string data = new JavaScriptSerializer().Serialize(Model);}

@section scripts
{
    <script src="~/Scripts/knockout-3.2.0.js"></script>
    <script src="~/Scripts/knockout.mapping-latest.js"></script>
    <script src="~/Scripts/familyViewModel.js"></script>
    <script type="text/javascript">
        var familyViewModel = new FamilyViewModel(@Html.Raw(data));
        ko.applyBindings(familyViewModel);
    </script>
}

<h2>@ViewBag.Title</h2>
<h4 data-bind="text: MessageToClient">@Html.DisplayFor(model => model.MessageToClient)</h4>

<div>
    <div>
        <label>Family Name</label>
        <input data-bind="value: FamilyName"/>
    </div>
    <div>
        <label>Family Phone</label>
        <input data-bind="value: PhoneNumber"/>
    </div>
    <div>
        <label>Family Email</label>
        <input data-bind="value: Email"/>
    </div>
    <div>
        <label>Street Address</label>
        <input data-bind="value: Address1"/>
    </div>
    <div>
        <label>Apt or Unit</label>
        <input data-bind="value: Address2"/>
    </div>
    <div>
        <label>City</label>
        <input data-bind="value: City"/>
    </div>
    <div>
        <label>State</label>
        <input data-bind="value: State"/>
    </div>
    <div>
        <label>Zip Code</label>
        <input  data-bind="value: ZipCode"/>
    </div>
    <div>
        <label>Income Range</label>
        <input data-bind="value: FamilyIncome"/>
    </div>
</div>
<p><button data-bind="click: save">Save</button></p>

Open in new window

0
Comment
Question by:wdarnellg
2 Comments
 
LVL 35

Accepted Solution

by:
Terry Woods earned 2000 total points
ID: 40583515
I've done a bit of Knockout, but not very recently. I think the self.save function needs to go within the FamilyViewModel template.

That's how it's done for the save function against the Cart in this example: http://knockoutjs.com/examples/cartEditor.html
0
 

Author Closing Comment

by:wdarnellg
ID: 40583688
That was it!
Thank you very much!
wdg
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article discusses how to create an extensible mechanism for linked drop downs.
A while back, I ran into a situation where I was trying to use the calculated columns feature in SharePoint 2013 to do some simple math using values in two lists. Between certain data types not being accessible, and also with trying to make a one to…
This video teaches users how to migrate an existing Wordpress website to a new domain.
In this fifth video of the Xpdf series, we discuss and demonstrate the PDFdetach utility, which is able to list and, more importantly, extract attachments that are embedded in PDF files. It does this via a command line interface, making it suitable …
Suggested Courses

879 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question