[CAUSEWAY-3585] [Metamodel] Allow for Types that subclass an Entity Type to actually be a Viewmodel.

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Resolved
• Fix Version/s: 2.0.0-RC3
• Component/s: Core
• Assignee: Andi Huber
• Reporter: Andi Huber
• Created: 17/Sep/23 07:33
• Updated: 26/Sep/23 14:44
• Resolved: 17/Sep/23 07:43

Description

For an entity relation where the looked up entity does not exist, there are 3 possible ways to handle this:
(1) fail
(2) consider the looked up entity as not strictly required to be resolvable and render a (none) badge
(3) render a pseudo entity, that has the information, which primary or secondary lookup key could not be resolved and perhaps render in a different/warning color say

Re (3) such a pseudo entity needs to be bookmarkable, hence would be appropriate to implement as viewmodel.

class MyEntityNotFound extends MyEntity implements ViewModel {
    public MyEntityNotFound (final String memento) { setName(memento); }
    @Override public String viewModelMemento() { return getName(); }
}