NavigationListItem & Sort - sapui5

Question

I tried to sort a NavigationListItem on a field which is different from the keyfield within the onInit method of the view controller w/o any success.
Note, there is no orderby implementation on the server side.
My xml view which doesn't implement any sorter since orderby isn't implemented: https://openui5.hana.ondemand.com/#/api/sap.tnt.NavigationListItem
<tnt:NavigationList id="navigationList">
<tnt:NavigationListItem icon="sap-icon://"
expanded="{expanded}"
key="{MY_KEY}"
items="{/MY_PATH}">
<tnt:NavigationListItem text="{MY_CONTENT}" key="{MY_KEY}"></tnt:NavigationListItem>
</tnt:NavigationListItem>
</tnt:NavigationList>
Here is an attempt to add a sorter that presently doesn't work. First, because return items correspond to the first level of NavigationListItem and secondly probably because of a wrong approach.
var oNavigationList = this.getView().byId('navigationList');
var aSorter = [];
aSorter[0] = new sap.ui.model.Sorter('MY_FIELD', true);
var oItems = oNavigationList.getItems();
oItems.sort("items", {path: "/MY_PATH", sorter: aSorter});
Could you please advice on the appropriate approach?

Answer 1

Since your List is bound to ODATA Model, all the sorting will happen at server side. Every time you say, sort, a new request is sent to server. Now, as you said, the server is not supporting orderby, I suggest the following approach :
Do oDataModel.read and store the data in a JSON Model. oData Read API
Apply the sorting in XML using below code:
<tnt:NavigationList id="navigationList">
<tnt:NavigationListItem icon="sap-icon://"
expanded="{expanded}" key="{MY_KEY}"
items="{
path : '/MY_PATH',
sorter: {
path: 'MY_CONTENT',
descending: false,
group: false
},
}">
<tnt:NavigationListItem text="{MY_CONTENT}"
key="{MY_KEY}"></tnt:NavigationListItem>
</tnt:NavigationListItem>
</tnt:NavigationList>
Let me know if you need more information.