xml view binding data from two entitysets

Question

I am working on a Master-Detail app. I have a view with list control and I am binding the same with the data from an entityset called "entityset1".

Odata -> data from the entityset1
<serialno>122333</serialno>

I do have another entityset called entityset2 in the same service.

Odata -> data from the entityset2
<hdata>is Active</hdata>

Data from above entityset2 will only be retrieved with the filter (/sap/opu/odata/sap/My_SRV/entityset2?$filter=(serialno=122333)

I am now trying to retrieve the value from the entityset2 and trying to bind it to one attribute in my list. This list is already binded with the entityset1 data.

Myview.xml.

<List id="list" select="_handleSelect">
    <ObjectListItem id="MAIN_LIST_ITEM" press="_handleItemPress" title="{Name}">
        <attributes>
            <ObjectAttribute id="ATTR1" text="{serialno}" />
<ObjectAttribute id="ATTR2" text="{entityset2/hdata}" />            
        </attributes>
    </ObjectListItem>
</List>

Controller.js (binding using the below lines)

this.oList.bindAggregation("items", {
            path: '/entityset1',
            template: this.oListItem,
            filters: this.searchFilters
        });
var oserialnum = this.getView().getBindingContext().getObject().serialno;
var oHdata = new sap.ui.model.Filter("serialno", "EQ",oserialnum);
this.searchFilters = new sap.ui.model.Filter([oserialnum],true);
                this.oList.bindAggregation("items",{    
                    path : "/entityset2",   
                    filters :this.searchFilters
                });

However I am getting an error "Cannot read property 'getObject' of undefined" on this line "this.getView().getBindingContext().getObject().serialno".

Can someone kindly advise how to retrive the data from the entity2 and binding it to the list, ?

Nandan Chaturvedi Nandan Chaturvedi · Accepted Answer · 2018-07-05T09:33:58

You cannot get BindingContext using the view. Read more about binding Context - it's a pointer to an object in Model data.

Also, serialNo(the parameter you are trying to retrieve from the Model is also contextual i.e. it differs with each row item).

One way to do this would be:

onListeItemPress Event of the List

<ObjectListItem ... ... press="onListItemPress" >

In the corresponding Controller

`onListItemPress : function(oEvent){

var oserialnum = Event.getSource().getBindingContext("mainODataModel")..getProperty("serialNo")`

Let me know if this helps.

xml view binding data from two entitysets

3 Answers