# Extend on-hand inventory entities FinOps

Contents

There are some entities that you can use to get the on-hand inventory from Dynamics 365 Finance Operations:

 1 2 3 4 5 6  InventorySiteOnHandEntity InventorySiteOnHandV2Entity InventWarehouseInventoryStatusOnHandEntity InventWarehouseInventoryStatusOnHandV2Entity InventWarehouseOnHandEntity InventWarehouseOnHandV2Entity 

You can extend the ententies by adding new fields to tables and entities.

After you add fields to tables that are used by the inventSiteOnHandView view, you must sync the engine so that the extensions are correctly recognized.

1. Extend the InventSiteOnHandView view by adding the extension field.
2. Extend the InventSiteOnHandAggregatedView view with the extension fields.
3. Extend the InventSiteOnHandAggregatedViewBuilder viewBuilder class by modifying the getExtensionFields() method. In this way, you map old view fields to new view fields when viewBuilder synchronization is run.

For example, you’ve added the following four fields to the InventTable table through extension:

• Custom field 1
• Custom field 2
• Custom field 3
• Custom field 4

In the case, you must modify the getExtensionFields() method in the following way.