Type of the parameter must be a class annotated with @Entity

Question

I'm working with Room persistance databases in android but i get this error error: Type of the parameter must be a class annotated with @Entity or a collection/array of it. test.android.orca.com.ws2db.Models.User... user); Please help me

This is my DAO :

@Dao
abstract interface UserDao
{
@get:Query("SELECT * FROM user")
val getall: List<User>

@Query("SELECT * FROM user where name LIKE  :name AND login LIKE :login")
fun findByName(name: String, login: String): User

@Query("SELECT COUNT(*) from user")
fun countUsers(): Int

@Insert
fun insertAll(users: List<User>)

@Delete
fun delete(vararg user: User)
}

This is my Entity

@Entity(tableName = "user")
class UserTable {

@PrimaryKey(autoGenerate = true)
var uid: Int = 0

@ColumnInfo(name = "name")
var name: String? = null

@ColumnInfo(name = "login")
var login: String? = null

@ColumnInfo(name = "id")
var id: Int = 0

@ColumnInfo(name="url")
var url: String? = null

@ColumnInfo(name="company")
var company:String?=null

}

Database

@Database(entities = [UserTable::class], version = 1)
abstract class AppDatabase : RoomDatabase() {

abstract fun userDao(): UserDao

companion object {

    private var INSTANCE: AppDatabase? = null

    fun getAppDatabase(context: Context): AppDatabase? {
        if (INSTANCE == null) {
            INSTANCE = Room.databaseBuilder(context.applicationContext, 
             AppDatabase::class.java, "user-database")
                .allowMainThreadQueries()
                .build()
        }
        return INSTANCE
    }

    fun destroyInstance() {
        INSTANCE = null
    }
}}

This is the error : https://i.sstatic.net/FnECR.jpg

Ferran · Accepted Answer · 2019-06-04 08:29:01Z

1

You are mixing user and UserTable. User is valid for referencing your table, but your entity is UserTable

@Dao
abstract interface UserDao
{
@get:Query("SELECT * FROM user")
val getall: List<UserTable>

@Query("SELECT * FROM user where name LIKE  :name AND login LIKE :login")
fun findByName(name: String, login: String): UserTable

@Query("SELECT COUNT(*) from user")
fun countUsers(): Int

@Insert
fun insertAll(users: List<UserTable>)

@Delete
fun delete(vararg user: UserTable)
}

edited Jun 4, 2019 at 8:29

answered Jun 4, 2019 at 8:25

Ferran

1,4481 gold badge8 silver badges10 bronze badges

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

3 Comments

Badr Kouki Over a year ago

val getall: List<User> also should be val getall: List<UserTable> ?

Ferran Over a year ago

Glad to help. However, let me advise you to change some names. It's better to change UserTable to User_entity and user to user_table. I think it's more readable.

withoutOne Over a year ago

So, If I want to use model converter to entity by typeConverter How can I do that? Example, When I have a UserEntity and UserModel, I can want to save UserModel, And I want to converting by Model to Entity by @TypeConverter. In this case, compiler is throwing "Type of the parameter must be a class annotated with @Entity"

Collectives™ on Stack Overflow

Type of the parameter must be a class annotated with @Entity

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related