I have a grid that displays a comma-separated list of values, and it has an array that gets used in a template editor for the grid. (On the server, I transform the comma-separated list to an array for the Kendo multiselect AngularJS directive). I have almost everything working: display, edit, and adding values in the multiselect.
There's just one weird thing happening: after I add a value in the multiselect, click Save in the editor, and reopen the editor, the multiselect then only displays one of the most-recently entered values. I know that the values are there and going through the pipeline, because the values make it into the database. I can refresh the page, open the editor, and all the values display in the multiselect correctly, including the one I just added.
It's as if kendo "forgets" most of the values when I reopen the editor. How can this be prevented? Does the MultiSelect need to be rebound to the values? If so, how?
I have tried adding this onChange event, but it had no effect. I've added valuePrimitive to no effect. I tried specifying k-rebind, but it caused an error.
Here's the directive being used in the text/x-kendo-template:
<select kendo-multi-select
id="zipCode"
k-placeholder="'Enter zip codes...'"
style="width: 225px"
k-on-change="dataItem.dirty=true"
k-auto-bind="false"
k-min-length="3"
k-enforce-min-length="true"
k-data-source="options.zipCodeDataSource"
k-data-text-field="'text'"
k-filter="'startsWith'"
k-filtering="options.zipCodeFiltering"
k-no-data-template="'...'"
k-ng-model="dataItem.zipArray"
k-highlight-first="true" />
And this is the DataSource:
options.zipCodeDataSource = new kendo.data.DataSource({
severFiltering: true,
transport: {
read: {
url: serviceUrl + "ZipCode/Get",
type: "GET",
dataType: "json",
contentType: jsonType,
data: function (e) {
// get your widget.
let widget = $('#zipCode').data('kendoMultiSelect');
// get the text input
let filter = widget.input.val();
// what you return here will be in the query string
return {
filter: filter
};
}
},
},
schema: {
data: "data",
total: "Count",
model:
{
id: "text",
fields: {
text: { editable: false, defaultValue: 0 },
}
},
parse: function (response) {
return response;
}
},
error: function (e) {
}
});
If I display {{dataItem.zipArray}} in a <pre> all of the expected values are there.
I wonder if something needs to be added to the edit event handler in the kendo grid definition, but I'm not sure what it would be. I've had to do binding like that for the dropdownlist directive.
edit: function (e) {
if (e.model.marketId === 0) {
e.container.kendoWindow("title", "Add");
} else {
e.container.kendoWindow("title", "Edit");
}
// re-bind multi-select here??
// These two lines actually cause the multiselect to lose pre-existing items in dataItem.zipArray
// var multiselect = kendo.widgetInstance(angular.element('#zipCode'));
// multiselect.trigger('change');
}
...
Update:
This dojo demonstrates the issue.
Also, I notice that if I change k-min-length="3" to k-min-length="1", then the issue goes away. But in the scenario I'm working on, it needs to be 3.
This seems to be an issue with kendo itself. Back then this issue was reported here.
Ok based on the reply from telerik, this issue has been fixed in 2017 R3 SP1 release (2017.3.1018). You can verify it by using this updated dojo example: