error: Entity class must be annotated with @Entity
Solution 1
As it said in the first comment, you are trying to insert and delete HistorySongDao objects instead of HistorySong, your code will become:
@Dao
interface HistorySongDao {
@Delete
fun deleteSong(vararg historySong: HistorySong)
@Insert(onConflict = OnConflictStrategy.REPLACE)
fun insert(vararg historySong: HistorySong)
@Query("SELECT * FROM HistorySong")
fun loadAllSongs(): Array<HistorySong>
@Query("SELECT * FROM HistorySong WHERE songId = :mId")
fun findById(mId: Int): HistorySong
@Query("SELECT * FROM HistorySong WHERE is_favoutire = :getFavourite ")
fun getFavourite(getFavourite : Boolean) : Array<HistorySong>
@Update
fun updateUsers(vararg historySong: HistorySong)
}
Solution 2
I solved it by changing my @Database's argument (RoomDatabase class), I didn't realize and put my DAO where should be my Entity.
In my case:
@Database(entities = [WordDao::class],version = 1)
changed to:
@Database(entities = [WordEntity::class],version = 1)
So, when somebody gets this error, maybe should to check not only where the entity is declared but too where it is used.
Solution 3
Update Database Class to this
@Database(entities = arrayOf(QueuedSong::class, HistorySong::class), version = 2)
abstract class AppDataBase : RoomDatabase() {
abstract fun queuedSongDao(): QueuedSongDao
abstract fun historySongDao(): HistorySongDao
}
I change HistorySongDao.class to HistorySong.class
Solution 4
You have mistaken in your Database class with entities. Maybe you are calling Dao Interface rather then Entity class.
Solution 5
By me it was a different problem: [ instead of {
I put :
@Database(entities = [Sensor.class, Meter.class],version = 2)
instead of:
@Database(entities ={Sensor.class, Meter.class}, version = 2)
Mohamed Saber
Updated on May 06, 2021Comments
-
Mohamed Saber about 3 years
I decided to use kotlin with Room library and I really faced a lot of problems and tired from reading reference and finding a solution My Data Class:
@Entity data class HistorySong( @PrimaryKey var SongId: Int =0, @ColumnInfo(name = "song_name") var songName: String="", @ColumnInfo(name = "song_artist") var songArtist: String="", @ColumnInfo(name = "song_link") var songLink: String="", @ColumnInfo(name = "image_path") var songImagePath: String="", @ColumnInfo(name="is_favoutire") var songisFavourite: Boolean= false )
My Dao class :
@Dao interface HistorySongDao { @Delete fun deleteSong(historySongDao: HistorySongDao) @Insert(onConflict = OnConflictStrategy.REPLACE) fun insert(vararg historySongDao: HistorySongDao) @Query("SELECT * FROM HistorySong") fun loadAllSongs(): Array<HistorySong> @Query("SELECT * FROM HistorySong WHERE songId = :mId") fun findById(mId: Int): HistorySong @Query("SELECT * FROM HistorySong WHERE is_favoutire = :getFavourite ") fun getFavourite(getFavourite : Boolean) : Array<HistorySong> @Update fun updateUsers(vararg historySong: HistorySong) }
Database Class:
@Database(entities = arrayOf(QueuedSong::class, HistorySongDao::class), version = 2) abstract class AppDataBase : RoomDatabase() { abstract fun queuedSongDao(): QueuedSongDao abstract fun historySongDao(): HistorySongDao }
QueuedSong is working great but the problem in historySong is:
e: F:\SmartStreamer\app\build\tmp\kapt3\stubs\debug\com\pro\smartstreamer\Database\QueuedDatabase\HistorySongDao.java:7: error: Entity class must be annotated with @Entity public abstract interface HistorySongDao { ^ w: F:\SmartStreamer\app\build\tmp\kapt3\stubs\debug\com\pro\smartstreamer\Database\QueuedDatabase\AppDataBase.java:10: warning: Room cannot create an SQLite connection to verify the queries. Query verification will be disabled. Error: [SQLITE_ERROR] SQL error or missing database (near ")": syntax error) public abstract class AppDataBase extends android.arch.persistence.room.RoomDatabase { ^ w: F:\SmartStreamer\app\build\tmp\kapt3\stubs\debug\com\pro\smartstreamer\Database\QueuedDatabase\HistorySong.java:10: warning: There are multiple good constructors and Room will pick the no-arg constructor. You can use the @Ignore annotation to eliminate unwanted constructors. public final class HistorySong { ^ e: F:\SmartStreamer\app\build\tmp\kapt3\stubs\debug\com\pro\smartstreamer\Database\QueuedDatabase\HistorySongDao.java:15: error: Type of the parameter must be a class annotated with @Entity or a collection/array of it. com.pro.smartstreamer.Database.QueuedDatabase.HistorySongDao... historySongDao); ^ e: F:\SmartStreamer\app\build\tmp\kapt3\stubs\debug\com\pro\smartstreamer\Database\QueuedDatabase\HistorySongDao.java:11: error: Type of the parameter must be a class annotated with @Entity or a collection/array of it. com.pro.smartstreamer.Database.QueuedDatabase.HistorySongDao historySongDao); ^ e: F:\SmartStreamer\app\build\tmp\kapt3\stubs\debug\com\pro\smartstreamer\Database\QueuedDatabase\HistorySongDao.java:30: error: com.pro.smartstreamer.Database.QueuedDatabase.HistorySongDao is part of com.pro.smartstreamer.Database.QueuedDatabase.AppDataBase but this entity is not in the database. Maybe you forgot to add com.pro.smartstreamer.Database.QueuedDatabase.HistorySong to the entities section of the @Database? public abstract void updateUsers(@org.jetbrains.annotations.NotNull()
and :
FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':app:kaptDebugKotlin'. > Compilation error. See log for more details
I really can't find a solution.. Thanks in advance