The Association source retrieves objects from memory, not from the database.
An Association data source fills the widget with objects linked to another object by an association. To provide the context, the data widget needs to be nested within another data widget.
Sorting columns and searching is not possible in data widgets with an association data source. This is because these features require a database call to function, which an association data source does not necessarily initiate.
2.1 Entity (Path)
The Entity (path) property specifies the association by which the widget is populated. Only objects that are connected to the object of the surrounding data container by association will appear in the widget.