I’m following the indications of the book and arriver ad chapter 10, but the app cannot be compiled due to an error in the BaseballDao.java class produced during the build process. I get the following errors:
- Not sure how to convert a Cursor to this method’s return type (java.lang.Object).
- Query method parameters should either be a type that can be converted into a database column or a List / Array that contains such type. You can consider adding a Type Adapter for this.
- Unused parameter: continuation
- Type of the parameter must be a class annotated with @Entity or a collection/array of it.
- Not sure how to handle insert method’s return type.
- Type of the parameter must be a class annotated with @Entity or a collection/array of it.
- Not sure how to handle insert method’s return type.
- Type of the parameter must be a class annotated with @Entity or a collection/array of it.
- Not sure how to handle update method’s return type. Currently the supported return types are void, int or Int.
- Type of the parameter must be a class annotated with @Entity or a collection/array of it.
- Not sure how to handle update method’s return type. Currently the supported return types are void, int or Int.
- The query returns some columns [teamId, division, wins, losses, winsLastTen, streakCount, streakType, divisionGamesBack, leagueGamesBack, id] which are not used by java.lang.Object. You can use @ColumnInfo annotation on the fields to specify the mapping. You can annotate the method with @RewriteQueriesToDropUnusedColumns to direct Room to rewrite your query to avoid fetching unused columns. You can suppress this warning by annotating the method with @SuppressWarnings(RoomWarnings.CURSOR_MISMATCH). Columns returned by the query: teamId, division, wins, losses, winsLastTen, streakCount, streakType, divisionGamesBack, leagueGamesBack, id.
The error message is
C:\Users\ale\AndroidStudioProjects\AndroidBaseballLeague\app\build\tmp\kapt3\stubs\debug\org\mathverse\androidbaseballleague\data\BaseballDao.java:31: error: Not sure how to convert a Cursor to this method’s return type (java.lang.Object).
public abstract java.lang.Object getCurrentStandings(@org.jetbrains.annotations.NotNull()
(I’m using org.mathverse.androidbaseballleague as package name, instead of dev.mfazio.abl).
The BaseballDao.java class contains the following lines
@org.jetbrains.annotations.Nullable()
@androidx.room.Query(value = "SELECT * FROM standings")
public abstract java.lang.Object getCurrentStandings(@org.jetbrains.annotations.NotNull()
kotlin.coroutines.Continuation<? super java.util.List<org.mathverse.androidbaseballleague.standings.TeamStanding>> continuation);
This is the only function of the database having prblems.
How can I solve this issue?
Thanks