D365: How to make a standard field mandatory on a form in X++

Purpose:

The purpose of this post is to explain how can we make a standard field mandatory on a form in X++.

Application:

Dynamics 365 for Finance and Operations

Business requirement:

Business requirement is to make a field mandatory which is an optional field in Standard Dynamics.

Solution:

We are extending the PurchCreateOrder form in the code below and using chain-of-command, we’re extending the init method and making the Buyer group field mandatory on the form datasource.

Code

[ExtensionOf(formStr(PurchCreateOrder))]
internal final class ATLAS_PurchCreateOrder_Form_Extension
{
    /// <summary>
    /// Make a field mandatory.
    /// </summary>
    /// <remarks>
    /// Atlas Dynamics Pty Ltd.
    /// </remarks>
    void init()
    {
        next init();

        purchTable_DS.object(fieldNum(PurchTable, ItemBuyerGroupId)).mandatory(true);
    }

}