Develop Reference

Extjs 4.2 autosync dynamic grid store

I have a grid with dynamic columns:
MODEL
Ext.define('App.mdlCriteriosConcurso', {
extend: 'Ext.data.Model',
fields: [
]
});
STORE
Ext.define('App.strCriteriosConcurso', {
extend: 'Ext.data.Store',
model: 'App.mdlCriteriosConcurso',
autoLoad: false,
proxy: {
type: 'ajax',
api: {
read: 'some url',
update: 'some url',
},
reader: {
type: 'json',
root: 'data',
totalProperty: 'total'
},
writer: {
root: 'records',
encode: true,
writeAllFields: true
}
}
});
GRID
var almacenCriteriosConcurso = Ext.create('App.strCriteriosConcurso');
//Some code ...
{
xtype:'grid',
itemId:'gridCriteriosConcursoV4',
store:almacenCriteriosConcurso,
plugins: [Ext.create('Ext.grid.plugin.CellEditing', {clicksToEdit: 2})],
columns:[]
}
//Some code...
CONTROLLER
Here in the controller I have the next piece of code:
Ext.ComponentQuery.query('viewFichaDetalle #tabpanelsecundario4_1 #gridCriteriosConcursoV4')[0].getStore().addListener('metachange',function(store,meta){
var columnas=0;
var renderer1 = function(v,params,data){
if(v==''){
return '<div style="background-color:#F5FAC3;color:blue;">'+Ext.util.Format.number(0,'0.000,00/i')+'</div>';
}
else{
return '<div style="background-color:#F5FAC3;color:blue;">'+Ext.util.Format.number(v,'0.000,00/i')+'</div>';
}
};
var renderer2 = function(v,params,data){
if(v=='' || v==0){
return '<div style="background-color:#F5FAC3;color:green;">'+Ext.util.Format.number(0,'0.000,00/i')+'</div>';
//return '';
}
else{
return '<div style="background-color:#F5FAC3;color:green;">'+Ext.util.Format.number(v,'0.000,00/i')+'</div>';
}
};
Ext.each(meta.columns,function(col){
if(columnas==2){
meta.columns[columnas].renderer = renderer1;
}
if(columnas>=3){
meta.columns[columnas].renderer = renderer2;
}
columnas++;
},this);
Ext.suspendLayouts();
Ext.ComponentQuery.query('viewFichaDetalle #tabpanelsecundario4_1 #gridCriteriosConcursoV4')[0].reconfigure(store, meta.columns);
Ext.ComponentQuery.query('viewFichaDetalle #tabpanelsecundario4_1 #gridCriteriosConcursoV4')[0].setTitle("<span style='color:red;font-weight:bold;font-size: 12pt'>Criterios del Concurso con ID:</span> "+"<span style='color:black;font-weight:bold;font-size: 12pt'>"+this.IdConcurso+"</span>");
Ext.resumeLayouts(true);
},this);
I create the columns in the php, using the metadata.
With this code I add some renderers to the grid columns. And I see all the data perfect, and can edit the data.
In the php y generate the column and the field like this:
$array_metadata['columns'][]=array("header"=>"<span style='color:blue;'>Resultado</span>","dataIndex"=>"puntos_resultado","width"=>82,"align"=>"right","editor"=>"textfield");
$array_metadata['fields'][]=array("name"=>"puntos_resultado","type"=>"float");
And then pass $array_metadata to 'metaData' response.
But when I try to sync or autosync the store I get this error:
Uncaught TypeError: Cannot read property 'name' of undefined
at constructor.getRecordData (ext-all-dev.js:62247)
at constructor.write (ext-all-dev.js:62192)
at constructor.doRequest (ext-all-dev.js:102306)
at constructor.update (ext-all-dev.js:101753)
at constructor.runOperation (ext-all-dev.js:106842)
at constructor.start (ext-all-dev.js:106769)
at constructor.batch (ext-all-dev.js:62869)
at constructor.sync (ext-all-dev.js:64066)
at constructor.afterEdit (ext-all-dev.js:64162)
at constructor.callStore (ext-all-dev.js:101428)
UPDATE 1
I have fount this thread in Sencha Forums link , and I have tried all posibles solutions and Im getting allways the same error.

The error tells us that you don't fill the model's fields array properly, because that is where name is a required config. In ExtJS 4, you have to add all fields to the model for the sync to work properly.
To be exact, the Model prototype has to be filled with the correct fields before the instances are created.
This means that you will have to override the reader's getResponseData method, because between Ext.decode and readRecords you will have to prepare the model prototype by setting the fields as returned from the server; something like this:
App.mdlCriteriosConcurso.prototype.fields = data.fields;

Saving Only the changed record on a BackGrid grid?

I am in the process of learning Backbone.js and using BackGrid to render data and provide the end user a way to edit records on an Microsoft MVC website. For the purposes of this test grid I am using a Vendor model. The BackGrid makes the data editable by default (which is good for my purpose). I have added the following JavaScript to my view.
var Vendor = Backbone.Model.extend({
initialize: function () {
Backbone.Model.prototype.initialize.apply(this, arguments);
this.on("change", function (model, options) {
if (options && options.save === false) return;
model.url = "/Vendor/BackGridSave";
model.save();
});
}
});
var PageableVendors = Backbone.PageableCollection.extend(
{
model: Vendor,
url: "/Vendor/IndexJson",
state: {
pageSize: 3
},
mode: "client" // page entirely on the client side.
});
var pageableVendors = new PageableVendors();
//{ data: "ID" },
//{ data: "ClientID" },
//{ data: "CarrierID" },
//{ data: "Number" },
//{ data: "Name" },
//{ data: "IsActive" }
var columns = [
{
name: "ID", // The key of the model attribute
label: "ID", // The name to display in the header
editable: false, // By default every cell in a column is editable, but *ID* shouldn't be
// Defines a cell type, and ID is displayed as an integer without the ',' separating 1000s.
cell: Backgrid.IntegerCell.extend({
orderSeparator: ''
})
}, {
name: "ClientID",
label: "ClientID",
cell: "integer" // An integer cell is a number cell that displays humanized integers
}, {
name: "CarrierID",
label: "CarrierID",
cell: "number" // A cell type for floating point value, defaults to have a precision 2 decimal numbers
}, {
name: "Number",
label: "Number",
cell: "string"
}, {
name: "Name",
label: "Name",
cell: "string"
},
{
name: "IsActive",
label: "IsActive",
cell: "boolean"
}
];
// initialize a new grid instance.
var pageableGrid = new Backgrid.Grid({
columns: [
{
name:"",
cell: "select-row",
headercell: "select-all"
}].concat(columns),
collection: pageableVendors
});
// render the grid.
var $p = $("#vendor-grid").append(pageableGrid.render().el);
// Initialize the paginator
var paginator = new Backgrid.Extension.Paginator({
collection: pageableVendors
});
// Render the paginator
$p.after(paginator.render().el);
// Initialize a client-side filter to filter on the client
// mode pageable collection's cache.
var filter = new Backgrid.Extension.ClientSideFilter({
collection: pageableVendors,
fields: ['Name']
});
// REnder the filter.
$p.before(filter.render().el);
//Add some space to the filter and move it to teh right.
$(filter.el).css({ float: "right", margin: "20px" });
// Fetch some data
pageableVendors.fetch({ reset: true });
#{
ViewBag.Title = "BackGridIndex";
}
<h2>BackGridIndex</h2>
<div id="vendor-grid"></div>
#section styles {
#Styles.Render("~/Scripts/backgrid.css")
#Styles.Render("~/Scripts/backgrid-select-all.min.css")
#Styles.Render("~/Scripts/backgrid-filter.min.css")
#Styles.Render("~/Scripts/backgrid-paginator.min.css")
}
#section scripts {
#Scripts.Render("~/Scripts/underscore.min.js")
#Scripts.Render("~/Scripts/backbone.min.js")
#Scripts.Render("~/Scripts/backgrid.js")
#Scripts.Render("~/Scripts/backgrid-select-all.min.js")
#Scripts.Render("~/Scripts/backbone.paginator.min.js")
#Scripts.Render("~/Scripts/backgrid-paginator.min.js")
#Scripts.Render("~/Scripts/backgrid-filter.min.js")
#Scripts.Render("~/Scripts/Robbys/BackGridIndex.js")
}
When the user edits a row, it successfully fires the hits the model.Save() method and passes the model to the save Action, in this case BackGridSave and it successfully saves the record that changed, but seems to save all of the vendors in model when only one of the vendors changed. Is there a way from the JavaScript/Backbone.js/BackGrid to only pass one Vendor - the vendor that changed?
Update: I realized that it is not sending every vendor, but it is sending the same vendor multiple times as though the change event was firing multiple times.

I guess I answered my own question. Well, at least I am getting the desired result. I just added a call to off after the first on. Seems like this would not be necessary though.
var Vendor = Backbone.Model.extend({
initialize: function () {
Backbone.Model.prototype.initialize.apply(this, arguments);
this.on("change", function (model, options) {
if (options && options.save === false) return;
model.url = "/Robbys/BackGridSave";
model.save();
model.off("change", null, this); // prevent the change event from being triggered many times.
});
}
});

Kendo UI Grid Not showing spinner / load icon on initial read

I've set up my kendo ui grid to read data from an MVC action that returns JSON. I'm using the free version of Kendo and not the MVC specific, due to cost.
The issue is that when the page loads and does the initial population of the grid it doesn't show the loading spinner. After grid is populated and I go to another page or sort a column it shows up.
If I set the height parameter of the grid, I get the initial spinner but the grid only shows one row (should have shown 20).
Does anyone know why you have to set the height parameter? Or any way of getting the spinner to work without setting the height.
My kendo javascript kode:
$("#grid").kendoGrid({
dataSource: new kendo.data.DataSource({
transport: {
read: url,
parameterMap: function (options) {
var result = {
pageSize: options.pageSize,
skip: options.skip,
take: options.take,
page: options.page,
};
if (options.sort) {
for (var i = 0; i < options.sort.length; i++) {
result["sort[" + i + "].field"] = options.sort[i].field;
result["sort[" + i + "].dir"] = options.sort[i].dir;
}
}
return result;
}
},
requestStart: function () {
//kendo.ui.progress($("#loading"), true); <-- this works on initial load, but gives two spinners on every page or sort change
},
requestEnd: function () {
//kendo.ui.progress($("#loading"), false);
},
pageSize: 20,
serverPaging: true,
serverSorting: true,
schema: {
total: "total",
data: "data"
},
}),
height: "100%", <-- I want to avoid this as it renders the grid way to small
sortable: true,
pageable: {
refresh: true,
pageSizes: true,
buttonCount: 5
},
columns: [
{
field: "PaymentRefId",
title: "Id"
},
{
field: "DueDate",
title: "Due Date"
},
{
field: "Credit",
title: "Amount"
},
{
field: "InvoiceGroupId",
title: " ",
sortable: false,
template: 'See details'
}
],
});

I had this same issue. It actually is rendering the spinner / progress bar, but because the grid content area initially has no height, you can't see it. This worked for me. Give it a shot:
// This forces the grids to have just al little height before the initial data is loaded.
// Without this the loading progress bar / spinner won't be shown.
.k-grid-content {
min-height: 200px;
}

The solution var to use a variable to tell me if the dataset load was the initial one or not. It's not a perfect solution, but it's the only one I've been able to make work.
var initialLoad = true;
$("#grid").kendoGrid({
sortable: true,
pageable: {
refresh: true,
pageSizes: true,
buttonCount: 5
},
columns: [
{
field: "PaymentRefId",
title: "Id"
},
{
field: "DueDate",
title: "Due Date"
},
{
field: "Credit",
title: "Amount"
},
{
field: "InvoiceGroupId",
title: " ",
sortable: false,
template: 'See details'
}
],
});
var ds = new kendo.data.DataSource({
transport: {
read: url,
parameterMap: function (options) {
var result = {
pageSize: options.pageSize,
skip: options.skip,
take: options.take,
page: options.page,
};
if (options.sort) {
for (var i = 0; i < options.sort.length; i++) {
result["sort[" + i + "].field"] = options.sort[i].field;
result["sort[" + i + "].dir"] = options.sort[i].dir;
}
}
return result;
}
},
requestStart: function () {
if (initialLoad) <-- if it's the initial load, manually start the spinner
kendo.ui.progress($("#invoiceGroupGrid"), true);
},
requestEnd: function () {
if(initialLoad)
kendo.ui.progress($("#invoiceGroupGrid"), false);
initialLoad = false; <-- make sure the spinner doesn't fire again (that would produce two spinners instead of one)
},
pageSize: 20,
serverPaging: true,
serverSorting: true,
schema: {
total: "total",
data: "data"
},
});

Chances are, because you are creating and setting the datasource in the grid's initialization, the grid loads so fast that you don't see a load spinner. If you look at all the web demos for kendogrid on their website, you rarely see the initial load spinner. On large remote datasources that take longer to load, you would see it.
If I set the height parameter of the grid, I get the initial spinner but the grid only shows one row (should have shown 20)
It's not that it only shows one row. It's because it failed to read it your height property value so it defaulted to as small as possible. Height takes in a numeric pixel value and does not accept percentages. It couldn't read your value, so it probably took longer to initialize the grid, which allowed you to see the load spinner. Instead, height should be set like height: 400, for example. But this is besides the point.
If you really want the user to see a load spinner on start, try loading the datasource outside of the grid initialization. Basically, load the grid first, and load the datasource after so that there is slightly more delay between the grid rendering and datasource setting.
$("#grid").kendoGrid({
//kendoGrid details... but exclude dataSource
});
var ds = new kendo.data.DataSource({
//DataSource details...
});
And then set the datasource like this:
var grid = $("#grid").data("kendoGrid");
grid.setDataSource(ds);
grid.refresh();
However, I think this would still load pretty fast.
Another last resort if you still really want the spinner is to trick the user into thinking it's taking longer to load and manually call the load spinner like you've tried. Call kendo.ui.progress($("#loading"), true);, execute a small delay function for say 250ms and then turn the load spinner off, and then call grid.setDataSource(ds); and refresh.

Ext.grid.CheckboxSelectionModel not returning proper id values when multipal rows are checked in the grid

im using extjs3 . my problem is im loading the store from server side using ajax . as follows
var store_dept = new Ext.data.JsonStore({
totalProperty:'totalcount',
root:'rows_dept',
autoLoad:true,
url: '<%=getResultURL.toString()%>',
fields:[
{ name:'name'},
{ name:'id'},
{ name:'address'}
]
});
var sm_dept = new Ext.grid.CheckboxSelectionModel(
{
singleSelect: false,
checkOnly: false,
listeners: {
selectionchange: function(sm_dept) {
}
}
}
);
now im getting the response so im formatting it in renderer column as
function renderBufferResult_dept(value, p, record){
return String.format('<div style="white-space:normal !important;"><b>{1}</b><br/>{3}<br/>{2}<br/></div>',value,record.data.name,record.data.address,record.data.id);
}
the grid code is :
var grid_dept= new Ext.grid.GridPanel({
id:'resgriddept',
width:210,
height:300,
title:'Additional Notification',
store: store_dept,
trackMouseOver:false,
disableSelection:true,
loadMask: true,
sm:sm_dept,
// grid columns
columns:[
sm_dept,
{
header: "Details",
dataIndex: 'id',
width:210,
sortable: true,
renderer:renderBufferResult_dept
}
] ,
buttons: [
{
text:'Export To Excel',
handler: function()
{
if(property_list!=''){
/* var prop_list='';
for(var i=0 ;i<sm.selections.getCount();i++){
prop_list =prop_list+ sm.selections.get(i).data.id+',';
} */
window.open('<%=getxlFileURL%>'+'&id_list='+property_list);
}else{
alert('Select propert to Export');
}
}
},{
text:'Generate Letter',
handler: function()
{
var dept_id_list = '0,';
if(sm_dept.selections.getCount()>0){
alert('cont select');
for(var j=0 ;j<sm_dept.selections.getCount();j++){
alert("id "+sm_dept.selections.get(j).data.id);
dept_id_list = dept_id_list+sm_dept.selections.get(j).data.id+',';
alert('id with templist '+dept_id_list);
}
}
window.open('<%=getreportsURL%>'+'&id_list='+property_list+'&dept_id_list='+dept_id_list);
}
}],
buttonAlign:'center'
});//End Of Grid
// render it
grid_dept.render('res-grid-dept');
store_dept.load();
The problem comes when i hit generate letter button, the id's of the checked rows(1,2,3) comes like 0,1,1,2 when it must come like 0,1,2,3 in the alert.

This is happening because you use get method of MixedCollection while you should use itemAt. In api you can read that this method returns the item associated with the passed key (id in your case) OR index and that key has priority over index. So when you pass 0 then this is treated as index, because you don't have such key and for that index id is 1. But when you pass 1 then it is treated as key (id in other words) so it returns item with id 1.
Replace alert("id "+sm_dept.selections.get(j).data.id); with alert("id "+sm_dept.selections.itemAt(j).data.id); and you'll be good.

kendoui: How to display foreign key from remote datasource in grid

i have a kendoui grid which list claims. one of the columns is lenders which is a foreign key reference to the lenders table. what i want is to be able to display the lender name in the grid instead of its id reference.
ive setup the lenders datasource as follows
var dsLenders = new kendo.data.DataSource({
transport: {
read: {
url: "../data/lenders/",
dataType: "jsonp"
},
parameterMap: function(options, operation) {
if (operation === "read") {
return options;
}
}
}
});
and the grid looks like this
$("#gridClaims").kendoGrid({
dataSource: claimData,
autoSync:true,
batch: true,
pageable: {
refresh: true,
pageSizes: true
},
filterable: true,
sortable: true,
selectable: "true",
editable: {
mode: "popup",
confirmation: "Are you sure you want to delete this record?",
template: $("#claimFormPopup").html()
},
navigable: true, // enables keyboard navigation in the grid
toolbar: ["create"], // adds insert buttons
columns: [
{ field:"id_clm", title:"Ref", width: "80px;" },
{ field:"status_clm", title:"Status", width: "80px;" },
{ field:"idldr_clm", title:"Lender", values: dsLenders },
{ field:"type_clm", title:"Claim Type"},
{ field:"value_clm", title:"Value", width: "80px;", format:"{0:c2}", attributes:{style:"text-align:right;"}},
{ field:"created", title:"Created", width: "80px;", format: "{0:dd/MM/yyyy}"},
{ field:"updated", title:"Updated", width: "80px;", format: "{0:dd/MM/yyyy}"},
{ field:"user", title:"User" , width: "100px;"},
{ command: [
{text: "Details", className: "claim-details"},
"destroy"
],
title: " ",
width: "160px"
}
]
});
however its still displaying the id in the lenders column. Ive tried creating a local datasource and that works fine so i now is something to do with me using a remote datasource.
any help would be great
thanks

Short answer is that you can't. Not directly anyway. See here and here.
You can (as the response in the above linked post mentions) pre-load the data into a var, which can then be used as data for the column definition.
I use something like this:-
function getLookupData(type, callback) {
return $.ajax({
dataType: 'json',
url: '/lookup/' + type,
success: function (data) {
callback(data);
}
});
}
Which I then use like this:-
var countryLookupData;
getLookupData('country', function (data) { countryLookupData = data; });
I use it in a JQuery deferred to ensure that all my lookups are loaded before I bind to the grid:-
$.when(
getLookupData('country', function (data) { countryLookupData = data; }),
getLookupData('state', function (data) { stateLookupData = data; }),
getLookupData('company', function (data) { companyLookupData = data; })
)
.then(function () {
bindGrid();
}).fail(function () {
alert('Error loading lookup data');
});
You can then use countryLookupData for your values.
You could also use a custom grid editor, however you'll probably find that you still need to load the data into a var (as opposed to using a datasource with a DropDownList) and ensure that the data is loaded before the grid, because you'll most likely need to have a lookup for a column template so that you're newly selected value is displayed in the grid.
I couldn't quite get ForeignKey working in any useful way, so I ended up using custom editors as you have much more control over them.
One more gotcha: make sure you have loaded your lookup data BEFORE you define the column. I was using a column array that was defined in a variable I was then attaching to the grid definition... even if the lookup data is loaded before you use the grid, if it's defined after the column definition it will not work.

Although this post past 2 years, I still share my solution
1) Assume the api url (http://localhost/api/term) will return:
{
"odata.metadata":"http://localhost/api/$metadata#term","value":[
{
"value":2,"text":"2016-2020"
},{
"value":1,"text":"2012-2016"
}
]
}
please note that the attribute name must be "text" and "value"
2) show term name (text) from the foreign table instead of term_id (value).
See the grid column "term_id", the dropdownlist will be created if added "values: data_term"
<script>
$.when($.getJSON("http://localhost/api/term")).then(function () {
bind_grid(arguments[0].value);
});
function bind_grid(data_term) {
$("#grid").kendoGrid({
dataSource: ds_proposer,
filterable: true,
sortable: true,
pageable: true,
selectable: "row",
columns: [
{ field: "user_type", title: "User type" },
{ field: "user_name", title: "User name" },
{ field: "term_id", title: "Term", values: data_term }
],
editable: {
mode: "popup",
}
});
}
</script>

For those stumbling across this now, this functionality is supported:
https://demos.telerik.com/aspnet-mvc/grid/foreignkeycolumnbinding