data binding - Knockout Cart Editor Example questions : extending cascading drop-downs with nested arrays and functions -


here's my fiddle attempt combining code on knockout cascading cart editor live example on knockoutjs.com site, , rp niemeyer's example of data binding nested arrays try , achieve cascading cart extended product options in functional format given niemeyer.

  1. why doesn't quantity field update subtotal?
  2. why doesn't 'remove' work?
  3. why formatcurrency(price) produce 'unable parse bindings' error?
  4. why happen changing product field doesn't update price if 'add product' button pressed change appear in next line?
  5. in niemeyer's example 'add-product' , methods inside scope of functions rather cartline, copied 'subtotal' method - better place handle these operations?

thanks work of s.sanderson, r.p.niemeyer, j.papa incredible effort in community promote knockout. it's awesome!

alright, fiddle bit more complicated needs be, have tried leave structure alone in case planning expand. have few questions though, i'll @ end. first, questions:

  1. you had several quantity , subtotal properties, 1 on each object (line, category, , product). layering had confused them (and me, honestly). removed quantity , subtotal properties on models, didn't make sense anyway, left them in data. should sort out want like.

  2. your layering wrong, removeline looking function on cartline, , sending product, had function on viewmodel , needed cartline. moving remove line outermost context fixed this.

  3. i didn't error.

  4. your price not getting update properly. context-layering issue.

  5. i think linked wrong fiddle niemeyer, 1 linked has no product in it.

here working fiddle code. it's still bit messy because, again, tried not mess more needed to. should consider restructuring data and/or viewmodels though, doesn't need complex. removed of layering though, since didn't match viewmodel.

also, category.subscribe method inside computed observable subtotal. moved outside, onto model.

note: using knockout2.0 in fiddle. please consider updating. knockout1.3beta not implement control flow in same way, , causing seperate error didn't talk about.

so, questions:

  1. why there quantity on both product , options in data , object defintions?
  2. why there subtotal on each of product, category , cartline?
  3. why there grandtotal on menu , viewmodel? 3a. why there grandtotal on menu @ all? makes no sense.

Comments

Post a Comment

Popular posts from this blog

java - Play! framework 2.0: How to display multiple image? -

i need display gallery of photos. here template: @(photos: list[photo]) @title = { <bold>gallery</bold> } @main(title,"photo"){ <ul class="thumbnails"> @for(photo <- photos) { <li class="span3"> <a href="#" class="thumbnail"> <img src="@photo.path" alt=""> </a> </li> } </ul> } and here controller method: public static result getphotos() { return ok(views.html.photo.gallery.render(photo.get())); } and here photo bean : @entity public class photo extends model { @id public long id; @required public string label; public string path; public photo(string path, string label) { this.path = path; this.label = label; } private static finder<long, photo> find = new finder<long, photo>( long.class, photo.class); public static list<phot...
Read more

gmail - Is there any documentation for read-only access to the Google Contacts API? -

i want read-only access user's google contacts. there stackoverflow member wanted this, , received following answer : yes, there is, use https://www.googleapis.com/auth/contacts.readonly scope , "view contacts". this exchange reference read-only access google contacts can find using google. simply using access token obtained attempt read usual google contacts api (i.e. https://www.google.com/m8/feeds ) fails insufficient permissions. similarly, using google contacts api on new target fails 404 errors (for example https://www.googleapis.com/auth/contacts.readonly/default/full ). is there documentation anywhere on how use api, or permissible way access google contacts api full read-write access?
Read more

php - Controller/JToolBar not working in Joomla 2.5 -

relevant code: jtoolbarhelper::custom('savecategories', 'save', '', 'save', false, false); ... <input type="hidden" name="controller" value="easyblogcontroller"> according can dig docs , own previous questions, should call savecategories() function in easyblogcontroller . i've tried setting value easyblog , easyblog.php (file name) current easyblogcontroller (class name). clicking on save button refreshes page. not redirect, echo or var_dump test code put in savecategories() function. var_dump ing jrequest::getvar('controller') , 'task' return correct values. creating controller object , using $controller->execute('task'); works. the values going depend on location of controller trying call, , have couple options here. typically there controller in base folder of component (likely components/com_easyblog) in file called controller.php , class name inside ...
Read more