error: Entity class must be annotated with @Entity

Question

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

For starters, you're trying to insert and delete HistorySongDao objects instead of HistorySong objects. See if fixing that helps with some of these errors. — zsmb13
– zsmb13, Commented Feb 1, 2018 at 18:23

felipe · Accepted Answer · 2019-02-15 19:14:37Z

91

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.

answered Feb 15, 2019 at 19:14

felipe

1,3711 gold badge10 silver badges5 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

cbn Over a year ago

Thanks from 2024 back to you in 2019! I spent an hour on this and looked and looked and looked. I have several entities and they all worked, but not my latest addition. Thanks to you I immediately spotted I'd inadvertently added "Dao" to the end of the new class name. So easy to miss. Thank you!

Moncef AOUDIA · Accepted Answer · 2018-02-01 19:46:04Z

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)
}

Raymond Barrinuevo · Accepted Answer · 2018-09-26 09:08:51Z

11

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

answered Sep 26, 2018 at 9:08

Raymond Barrinuevo

1671 silver badge6 bronze badges

Comments

BISHAL HALDER · Accepted Answer · 2021-05-05 12:44:54Z

9

You have mistaken in your Database class with entities. Maybe you are calling Dao Interface rather then Entity class.

answered May 5, 2021 at 12:44

BISHAL HALDER

1471 silver badge3 bronze badges

2 Comments

ozkanpakdil Over a year ago

Can you tell the class names in your answer. It will be more helpful for understanding.

BISHAL HALDER Over a year ago

Open your Database class right here.. @Database (entities ={Entity.class}, version=1,exportedSchema =false) > look at the the entities={ } part here maybe you are calling your Dao interface or something else.

batsheva · Accepted Answer · 2019-09-10 12:00:17Z

3

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)

answered Sep 10, 2019 at 12:00

batsheva

2,3351 gold badge23 silver badges34 bronze badges

Collectives™ on Stack Overflow

error: Entity class must be annotated with @Entity

5 Answers 5

1 Comment

Comments

Comments

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

1 Comment

Comments

Comments

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related