Lookup by referrence field

Guys! In AX 2012, we could add the lookup in the form by reference field. For that It is necessary to understand the relations of tables. As we know relations between tables are used to associate rows in one table to rows in another table. In AX relationship between tables are defined within the MS Dynamics AX application and not at the physical database level. There are different sorts of relations. To get more detail visit the MSDN about How to Add a relation to a Table.
Lets say we have different categories of Items for storing in the inventory. I want to see specific category of items to be displayed in my lookup on inventory receiving form.
Start with adding relation in the inventory receiving table with items table. You can modify the relation according to your need. For showing the fruit category I have used related field fixed relation too.

There must be field group defined in Items table

Now add the reference group as new control in the grid container of the form and set the DataSource, ReferenceField and ReplacementGroupField Properties.

Here we go! You can only see the fruits category in this look up.

This was small post to show you how the lookups can be added in the forms by reference field group field.