Room cannot verify the data integrity

Question

I am getting this error while running program with Room Database

Room cannot verify the data integrity. Looks like you\'ve changed schema but forgot to updat         


        

Answer 1

In order to fix the problem in kotlin:

First

@Database(entities = [Contact::class], version = 2)

Second

val MIGRATION_1_2 = object : Migration(1, 2) {
        override fun migrate(database: SupportSQLiteDatabase) {
            database.execSQL("ALTER TABLE Contact ADD COLUMN seller_id TEXT NOT NULL DEFAULT ''")
        }
    }

Third

private fun buildDatabase(context: Context) = Room.databaseBuilder(
            context.applicationContext,
            EpayDatabase::class.java,
            "epay"
        )
            .addMigrations(MIGRATION_1_2)
            .build()

For more details, check the official documentation