knockoutjs $parent undefined - model-view-controller

I have a problem with KnockoutJS, where the $parent binding context is undefined.
Code
<div class="row">
<div class="col-md-4">
<div class="panel panel-info">
<div class="panel-heading">
<h2 class="panel-title">Products Data</h2>
</div>
<div class="panel-body">
<table class="table table-striped table-bordered table-condensed" data-bind="with: ProductsViewModel">
<thead>
<tr>
<th>ProductID</th>
<th>Product Name</th>
<th>Units In Stock</th>
<th>Action</th>
</tr>
</thead>
<tbody data-bind="foreach: products">
<tr>
<td data-bind="text: $data.ProductID"></td>
<td data-bind="text: $data.ProductName"></td>
<td data-bind="text: $data.UnitsInStock"></td>
<td><button class="btn btn-danger btn-xs" data-bind="click: $parent.RemoveProduct">[x] delete</button></td>
</tr>
</tbody>
</table>
<button class="btn btn-large" data-bind="click: GetProducts()">Load Data</button>
</div>
</div>
</div>
</div>
and:
/// <reference path="../Scripts/knockout-3.4.0.js" />
/// <reference path="../Scripts/jquery-1.10.2.js" />
function ProductsViewModel() {
var self = this;
self.products = ko.observableArray([]);
self.RemoveProduct = function () {
bootbox.alert({ message: 'Pressed !!', size: 'small' });
}
self.GetProducts = function () {
self.products.removeAll();
$.getJSON('/api/products', function (data) {
$.each(data, function (key, value) {
self.products(data);
});
});
}
}
$(document).ready(function () {
ko.applyBindings(ProductsViewModel);
});
All the binding work correctly in the table, except the click event binding on the button, where the $parent is undefined.
If I remove the button control all the data binds correctly in the table element.
Any ideas how to fix this ?? It's all standard Knockout code to my knowledge.
Thanks in advance.
bax2097
I've fixed this by removing the $parent altogether. All working now.

Problems
In your Html you bind your table into a with: ProductsViewModel. Which is not needed.
In your Load data button you did not pass the actual function, instead you execute it right away, so just remove ().
See this JsFiddle for demo

Related

Ajax- DataTable Not Nowrking

I'm processing the incoming data with Ajax as follows. But I can't make it compatible with dataTable. I've read the Datatable Ajax documentation. But I was never successful. How do I pull the following data into the dataTable? I want to make these codes compatible for Data Table.
You can see multiple parse operations in my code. Please do not warn about it. Net Core, I can only process the JSON file in this way. The only thing I want from you is to show this data that I have processed successfully in the datatable.
<div class="card" id="view-maincategorylist">
<div class="card-body">
<div class="table-responsive">
<table id="datatablex" class="table table-striped table-bordered" style="width:100%">
<thead>
<tr>
<th class="text-center">Fotoğraf</th>
<th class="text-center">Ana Kategori Adı</th>
<th class="text-center">Seçenekler</th>
<th class="text-center">İşlemler</th>
</tr>
</thead>
<tbody id="table-maincategories">
</tbody>
</table>
</div>
</div>
</div>
<script>
function GetMainCategoryList() {
$.ajax({
url: "/Admin/BusinessCategories/MainCategories/",
contentType: "application/json",
dataType: "json",
type: "Get",
success: function (data) {
var item = jQuery.parseJSON(data);
$("#table-maincategories").empty();
$.each(JSON.parse("[" + item + "]"), (index, value) => {
for (let element of value) {
$("#table-maincategories").append(`<tr class="text-center">
<td><img src="${element.Image}" style="height:80px;" /></td>
<td>${element.Name}</td>
<td>
<div class="form-check">
<a href="/Admin/BusinessCategories/MainShowMenu/${element.Id}" onclick="location.href=this.href;">
<input class="form-check-input" type="checkbox" id="flex_${element.Id}">
</a>
<label class="form-check-label" for="flex_${element.Id}">Menüde Göster</label>
</div>
</td>
<td>
<a onclick="ShowEditMainCategory(${element.Id})" class="btn btn-primary"><i class="bx bx-edit"></i> Düzenle</a>
<a onclick="DeleteMainCategory(${element.Id});" data-name="${element.Name}" id="del_${element.Id}" class="btn btn-danger delete-button"><i class="bx bx-trash"></i> Sil</a>
</td> </tr>`);
var checkbox = document.getElementById('flex_' + element.Id);
if (element.ShowMenu == true) {
checkbox.checked = true;
}
else {
checkbox.checked = false;
}
}
});
$('#datatable').DataTable();
ViewShowHide(1);
},
error: function () {
Swal.fire('Veriler Okunamadı!', '', 'error')
}
})
}
</script>
Problem Images:
image 1
image 2
image 3
JSON Data Output:
https://easyupload.io/1bsb75

how to reload table when certain row is created or delete?

I am just learning Vuejs with laravel. and my Delete is Working correctly but when it redirect to index page after row is deleted that row is not removed until it is loaded..
And for When Category is added new data is not shown until browser is loaded...
This is my Categories Component `
<form role="form" method="POST" enctype="multipart/form-data" #submit.prevent="createCategory" v-if="adding">
<div class="card-header">
<h3 class="card-title">Create New Category</h3>
</div>
<div class="card-body">
<div class="row">
<div class="col-md-12">
<div class="form-group">
<label>Category Name</label>
<input type="text" class="form-control" id="category_name" v-model="category_name" placeholder="Enter Category Name">
</div>
</div>
</div>
</div>
<div class="card-footer">
<button type="submit" class="btn btn-primary">Submit</button>
<button #click.prevent="cancel" class="btn btn-danger">Cancel</button>
</div>
</form>
<div class="card-body" v-else>
<div class="card-header" >
<h3 class="card-title"><a class="btn btn-block btn-outline-secondary btn-lg" #click.prevent="add()"> Create New Category</a></h3>
</div>
<table id="example2" class="table table-bordered table-hover" >
<head>
<tr>
<th>ID</th>
<th>Category Name</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<tr v-for="(category,index) in model" :category="category" v-bind:key="category.id">
<td>{{category.id}}</td>
<td>{{category.category_name}}</td>
<td>Edit | <a #click="deleteCategory(category.id,index)" class="btn-outline-
danger">Delete</a></td>
</tr>
</body>
</table>
</div>
</div>
`
<script>
export default {
props:['model'],
data(){
return {
model:[],
section_id: 0,
sections: [],
parent_id: 0,
categories: [],
adding:false,
category_name:'',
}
},
methods:{
add(){
this.adding=true;
},
cancel(){
this.adding=false;
},
createCategory(){
axios.post(`categories `,{
category_name:this.category_name,
}).catch(error => {
console.log('Error')
})
.then(res=>{
this.adding=false;
})
},
deleteCategory(id,index){
if(confirm('Are You Sure ?')){
axios.delete('categories/'+id)
.then(resp => {
this.model.splice(index, 1);
})
.catch(error => {
console.log(error);
})
}
}
},
}
</script>
<table id="example2" v-if="flag" class="table table-bordered table-hover" >
<head>
<tr>
<th>ID</th>
<th>Category Name</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<tr v-for="(category,index) in model" :category="category" v-bind:key="category.id">
<td>{{category.id}}</td>
<td>{{category.category_name}}</td>
<td>Edit | <a #click="deleteCategory(category.id,index)" class="btn-outline-
danger">Delete</a></td>
</tr>
</body>
</table>
in data add flag:false,
data(){
return {
model:[],
section_id: 0,
sections: [],
parent_id: 0,
categories: [],
adding:false,
category_name:'',
flag:false
}
},
in your functions make your flag false in case of success response
deleteCategory(id,index){
this.flag=false;
if(confirm('Are You Sure ?')){
axios.delete('categories/'+id)
.then(resp => {
this.model.splice(index, 1);
this.flag=true;
})
.catch(error => {
console.log(error);
this.flag=false;
})
}
}
I think that you are overcomplicate this. Just create an API that retrieve all the categories. So after each addition or deletion, then just call that API.

How to show checkbox selected values in the same laravel view before submitting the form?

I have create.blade.php view. And that view showing a table with checkbox in each row. Now I want to show the checked row on the same view next to this table. Till now what I am getting the all the checked values but how can show it the same view before sending any post request to the server.
Here is some code-
#if(count($movies) > 0)
<div class="table-responsive">
<table class="table table-striped table-hover" data-toggle="dataTable"
data-form="deleteForm">
<thead>
<tr>
<th></th>
<th scope="col">Name</th>
</tr>
</thead>
<tbody>
<label>Select movies</label>
#foreach($movies as $movie)
<tr>
<td>
<input class="form-check" type="checkbox" name="movie_cb" id=" .
{{$movie->id}}" value="{{$movie->name}}">
</td>
<td>{{$infeedVideo->name}}</td>
</tr>
#endforeach
</tbody>
</table>
#else
<div class="text-center">
<hr>
<p class="text-center">No movies found</p>
</div>
#endif
app.blade.php
<script type="text/javascript">
$(document).ready(function() {
$("#showCBs").click(function(){
var favorite = [];
$.each($("input[name='movie_cb']:checked"), function(){
favorite.push($(this).val());
});
alert("My favourite movies are: " + favorite.join(", "));
});
});
</script>
Now how can I pass the favorite array from app.blade.php to my laravel view create.blade.php. Thank you

Why is The Entire Body of the Web page loaded to the table instead of the data when retrieving data from the database using ajax in Larvel

I have this table showing all the encashment records, it works fine but when I try to get the rows from the database within a specific range of dates and display it to the same table, the whole body of the webpage is being loaded to the table instead of the rows from the database.
Please see image below:
this is my function from the tableController.php
function encashmentRecord_DateRange(Request $request){
if($request->ajax())
{
$start = $request->get('startDate');
$end = $request->get('endDate');
$data = DB::table('encashment_requests')->whereBetween('date',[$start,$end])->get();
return view('incashment',compact('data'));
}
}
the script in my encashment.blade.php
$(document).ready(function(){
$('#dataTable').DataTable();
$('#start_date').datepicker({
format:'yyyy-mm-dd',
autoclose:true
}).val();
$('#end_date').datepicker({
format:'yyyy-mm-dd',
autoclose:true
}).val();
var range = document.getElementById('btnrange');
range.addEventListener('click',function(){
var start_date = $('#start_date').val();
var end_date =$('#end_date').val();
alert(end_date);
$('#dataTable').DataTable().destroy();
listDateRange(start_date,end_date);
},false);
function listDateRange(startDate,endDate){
$.ajax({
method: 'GET',
url : "{{ route('encashmentRecord.action') }}",
data: {startDate:startDate, endDate:endDate},
success:function(data)
{
alert(data);
$('#dataTable').html(data);
}
})
}
});
If you only need the data, you shouldn't be returning view() from your controller.
Try replacing it with this: return response()->json($data, 200);
I may have found the solution to my problem, though it may look lengthy. But it worked.
I made another view, encashmentRecord.blade, containing only the table, so in the controller, instead of returning the data in the incashment.blade, I returned the data to the new view, encashentRecord.blade and I use "#include('encashmentRecord')" in my incashment.blade to display the table.
encashmentRecord.blade.php
<div class="card-body">
<table id="dataTable" class="table table-striped table-bordered">
<thead>
<tr>
<th>Name</th>
<th>Account ID</th>
<th class="sort">Date</th>
<th>Desired Ammount</th>
<th>Destination</th>
<th>Status</th>
</tr>
</thead>
<tbody>
#if(isset($data))
#foreach($data as $row)
<tr>
<td>{{ $row->account_name}}</td>
<td>{{ $row->account_id}}</td>
<td>{{ $row->created_at}}</td>
<td>Php {{ $row->requested_ammount}}</td>
<td>{{ $row->destination}}</td>
<td>{{ $row->status}}</td>
</tr>
#endforeach
#else
<tr>
No Data
</tr>
#endif
</tbody>
</table>
and this is incashment.blade.php
<div class="row">
<div class="col-xl-3 ">
<input type="text" name="query" id="start_date" class="form-control input_daterange">
</div>
<div class="col-xl-3 ">
<input type="text" name="query" id="end_date" class="form-control">
</div>
<div class="col-xl-3 ">
<button class="btn" id="btnrange">Go</button>
</div>
</div>
<div class="card" style="margin-bottom: 0px">
<div class="card-header">
Encashment Record
</div>
<div id="table_data">
#include('tables.encashmentRecord')
</div>
</div>
I just change the view in my return on the controller
return view('tables.encashmentRecord',compact('data'));

kendo ui grid fails after bound data is refreshed

I'm using knockout-kendo and here is my code:
markup:
<body>
<div id="mursi"
data-bind="kendoGrid:{ dataSource:{data:selectedAsset().RealEstateAssetBlockParcel ,pageSize:3} ,data:selectedAsset().RealEstateAssetBlockParcel, pageable: true,pageSize:5,sortable:true,scrollable:false,selectable:true,columns:[{title:'parcel'},{title:'plot'},{title:'subplot'},{ width:60},{ width:60}] ,rowTemplate: 'rowParcelTmpl', altRowTemplate: 'altParcelTmpl', useKOTemplates: true }"></div>
<button data-bind="replaceSelectedAsset">click me</button>
<script id="rowParcelTmpl" type="text/html">
<tr>
<td>
<div data-bind="text:Block"></div>
</td>
<td>
<div data-bind="text:Plot"></div>
</td>
<td>
<div data-bind="text:SubPlot"></div>
</td>
<td>
<button class="k-button"><span class="update-button"></span></button>
</td>
<td>
<button class="k-button"><span class="remove-button"></span></button>
</td>
</tr>
</script>
<script id="altParcelTmpl" type="text/html">
<tr class="k-alt">
<td>
<div data-bind="text:Block"></div>
</td>
<td>
<div data-bind="text:Plot"></div>
</td>
<td>
<div data-bind="text:SubPlot"></div>
</td>
<td>
<button class="k-button"><span class="update-button"></span></button>
</td>
><span class="remove-button"></span></button></td>
</tr>
</script>
</body>
here is my JS:
var selectedAsset = ko.observable();
//viewmodels
var assetViewModel = function () {
this.RealEstateAssetBlockParcel = ko.observableArray([]);
};
var asset = new assetViewModel();
asset.RealEstateAssetBlockParcel.push({Block: 1, Plot: 2, SubPlot: 3, Id: 0});
selectedAsset(asset);
var replaceSelectedAsset = function () {
selectedAsset(asset);
};
ko.applyBindings();
everything is allright until you press the "click me" button, which suppose to select another asset and display its parcels grid,
Instead i got following error:"Uncaught TypeError: Cannot call method 'find' of undefined "
(which originated in kendo.web.all)
http://jsbin.com/oboxig/3/edit
Help will be appreciated
Thanks
What I see in you JSBin is an error in the data-bind of the button.
Could you try:
function replaceSelectedAsset () {
selectedAsset(asset);
};
and define the button as:
<button onclick="replaceSelectedAsset()">click me</button>

Resources