Adding a String to a DataSource that has been created from an Array

[mgs]

When creating a DataSource from an array, I can iterate the strings.

var arr = ["one", "two", "three"];
var datasource = new kendo.data.DataSource({
   data: arr
});
datasource.read();

var data1 = datasource.data();
for (var i = 0; i < data1.length; i++) {
   alert(data1[i]);
}

Then I add a new string to the datasource.

datasource.add("four");
var data2 = datasource.data();
for (var i = 0; i < data2.length; i++) {
   alert(data2[i]);
}

As a result, three strings and one object are returned from the datasource.

What should be added, so that the loop returns four strings?

Michael G. Schneider

[Rosen]

Hello Michael,

As stated in the documentation, the DataSource add method expected either an Object or a Model instance. This object will be then wrapped into an ObservableObject. Thus, passing a string will not yield correct results and is not supported. If you want to add a string value to the array you should use its push method instead. 

datasource.data().push("four");

All the best,

Rosen
the Telerik team

[mgs]

Hello Rosen,

thanks a lot for the answer.

So it is best, never to create a DataSource by giving it an array of strings. For being able to work with the DataSource afterwards, always an array of objects should be given.

Michael G. Schneider