Nested Instance Of Ember Models Table

Hello, I want to use nested ember models table eg. Step 1 : I want to use ember models table(parent Instance), step 2: map expandedRowTemplate to a component , step3 : call ember models table(child instance) inside the component. Problem is -> 1 . I can not assign 2 diffrenet set of values to different column sets(one for parent and other for child instance) 2 . didInsertElement() in child instance is not getiing callled.(I checked via putting simple alert value inside function). Please let me know if any queries. Thanks in Advance.