IssueTracker

Component used: Room
Version used: beta-1
Devices/Android versions reproduced on: happens at compile time

The sample project attached to this bug report shows that Room does not check if I'm trying to get an entity from another table. The consequence is that sometimes I get an error which doesn't really say much: "error: incompatible types: <null> cannot be converted to boolean". This error is triggered by Kotlin's Boolean, which in the bytecode can be sometimes primitive types and so null fails to match. But when using another type, everything would be fine except that we are querying the wrong table for that entity.

See in the sample project the SomeDao.kt class: the first query causes a compile time error, while the second one (which for me is still invalid and would crash immediately in Kotlin since the type is non null) apparently is OK (is that expected? I understand that this is what allows Room to returns a different object from the entity and that's really powerful, but at the same time it opens the doors for a lot of mistakes which won't be catched at compile time)