In this lesson, we create a new app, the Expenses App.
We previously created a custom object to track expenses. We added Lookup fields to Projects, Trips and Opportunities to be able to associate these expenses with. We also explore Lookup Filters and making them optional. I demonstrate how to override an optional lookup filter as well as encounter a limitation of Lookup Filters in Lightning vs. Classic.
Lookup Filters Not Optional in Lightning - https://success.salesforce.com/answers?id=9063A000000lAjhQAE
Vote on this Idea - https://success.salesforce.com/ideaView?id=0873A000000TtRdQAK