knockout.js - knockoutjs - accessing $parent/$root inside foreach binding -


here plunker code working on. have defined vm looks this.

    var employee = function(fname,lname){     var self= this;     self.fname = ko.observable(fname);     self.lname = ko.observable(lname);     self.selectedelement = ko.observable('default value');   }    var vm = function(){       var self = this;       self.employees = new ko.observablearray([]);       self.selectedelement = ko.observable(-1);        var e1 = new employee('f1','l1');       var e2 = new employee('f2','l2');       self.employees.push(e1);       self.employees.push(e2);   };    ko.applybindings(vm,container);

and code display list of employees 

<body id="container"> <h1>empoyees</h1> <div>   <div data-bind="foreach: employees">     <h4 data-bind="text: 'employee' + $index()"></h4>     <span>first name :</span>     <span data-bind="text: fname"></span>     <br/>      <span>last name :</span>     <span data-bind="text: fname"></span>     <br/>      <span data-bind="text: selectedelement()"></span>     <!-- want access parents 'selectedelement' i.e. vm.slectedelement() -->     <!--i tried below code causing binding error.-->     <!-- <span data-bind="text: $parent.selectedelement()"></span> -->     <br/>   </div> </div>

note lass 'employee' , main view model 'vm' both has identical property named ( selectedelement )

now inside foreach binding trying access 'selectedelement' property of root/parent context because inside foreach ko accessing 'selectedelement' property of 'employee' class.

i tried using $root , $parent keywords reach parent element property causing binding error.

am missing anything? here plunker link again.

you never creating instance of root view model. change initial call to

ko.applybindings(new vm(),container);

https://plnkr.co/edit/wrkfnji9jl9rj2unbgqp?p=preview

when that, either $root or $parent work expected.


Comments

Post a Comment

Popular posts from this blog

php - How to add and update images or image url in Volusion using Volusion API -

actually have store importing products store product data insert , update image or image url not insert , update. this xml code name datapro.txt. <products_joined> <productcode>3710_012t</productcode> <vendor_partno>eah5450silent/di/1gd3(lp)</vendor_partno> <productname>test product ta</productname> <hideproduct>n</hideproduct> <stockstatus>20</stockstatus> <lastmodified>1/5/2016 10:25:00 am</lastmodified> <lastmodby>2</lastmodby> <productweight>0.9</productweight> <productprice>100</productprice> <productmanufacturer>asus tek</productmanufacturer> <vendor_price>32.69</vendor_price> <numproductssharingstock>0</numproductssharingstock> <categoryids>107</categoryids> <producturl>http://tebkq.mvlce.servertrust.com/productdetails.asp?productcode=3710_012t</producturl...
Read more

Laravel mail error `Swift_TransportException in StreamBuffer.php line 269: Connection could not be established with host smtp.gmail.com [ #0]` -

i developing website contact-us page guest users can send me email using gmail . anytime try send mail using contact-us form, error swift_transportexception in streambuffer.php line 269: connection not established host smtp.gmail.com [ #0] this mail.php return [ 'driver' => env('mail_driver', 'smtp'), 'host' => env('mail_host', 'smtp.gmail.com'), 'port' => 587, 'from' => ['address' => '', 'name' => ''], 'encryption' => env('mail_encryption', 'tls'), 'username' => env('mail_username'), 'password' => env(mail_password), 'sendmail' => '/usr/sbin/sendmail -bs', 'pretend' => env('mail_pretend', false), ]; this .env mail_driver=smtp mail_host=smtp.gmail.com mail_port=587 mail_username=afecjaped@gmail.com mail_password=********...
Read more

c# SetCompatibleTextRenderingDefault must be called before the first -

i tried search exception couldn't find solution on case i'am using code below invoke .net application : assembly assem = assembly.load(data); methodinfo method = assem.entrypoint; var o = activator.createinstance(method.declaringtype); method.invoke(o, null); the application invoked has form , in entrypoint of application : [stathread] static void main() { application.enablevisualstyles(); application.setcompatibletextrenderingdefault(false); //exception application.run(new form1()); } setcompatibletextrenderingdefault must called before first iwin32window object created in application. edit : assembly = assembly.load(data); methodinfo method = a.gettype().getmethod("start"); var o = activator.createinstance(method.declaringtype); method.invoke(o, null); you should create new method skips initialization...
Read more