Room “Not sure how to convert a Cursor to this method's return type”: which method?

Question

Error:Not sure how to convert a Cursor to this method\'s return type
Error:Execution failed for task \':app:compileDebugJavaWithJavac\'.
Compilation failed; see the          


        

Answer 1

For anyone landing here, using a coroutine Flow as a return type, you will get this error if you accidentally make the function suspend. Since it is returning a flow, there is no need to suspend.

So instead of this:

@Query("SELECT * FROM myTable WHERE id = :id")
suspend fun findById(id: Long): Flow

use this (without suspend modifier):

@Query("SELECT * FROM myTable WHERE id = :id")
fun findById(id: Long): Flow