Я делаю миграцию, используя базу данных Room. Я получаю эту ошибку:
java.lang.IllegalStateException: Migration didn't properly handle coffee_productivity(io.github.omisie11.coffeeproductivitytracker.database.entity.CoffeeProductivityData).
Expected:
TableInfo{name='coffee_productivity', columns={date=Column{name='date', type='TEXT', affinity='2', notNull=true, primaryKeyPosition=0}, id=Column{name='id', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=1}, productivity=Column{name='productivity', type='INTEGER', affinity='3', notNull=true, primaryKeyPosition=0}, coffees_volume=Column{name='coffees_volume', type='INTEGER', affinity='3', notNull=true, primaryKeyPosition=0}, number_of_coffees=Column{name='number_of_coffees', type='INTEGER', affinity='3', notNull=true, primaryKeyPosition=0}}, foreignKeys=[], indices=[Index{name='index_coffee_productivity_date', unique=true, columns=[date]}]}
Found:
TableInfo{name='coffee_productivity', columns={date=Column{name='date', type='TEXT', affinity='2', notNull=true, primaryKeyPosition=0}, productivity=Column{name='productivity', type='INTEGER', affinity='3', notNull=true, primaryKeyPosition=0}, coffees_volume=Column{name='coffees_volume', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0}, number_of_coffees=Column{name='number_of_coffees', type='INTEGER', affinity='3', notNull=true, primaryKeyPosition=0}, id=Column{name='id', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=1}}, foreignKeys=[], indices=[Index{name='index_coffee_productivity_date', unique=true, columns=[date]}]}
Похоже, что порядок столбцов изменился, но я только добавил новый столбец.
Организация:
@Entity(tableName = "coffee_productivity", indices = [Index(value = "date", unique = true)])
data class CoffeeProductivityData(
@PrimaryKey(autoGenerate = true) var id: Long?,
@ColumnInfo(name = "date") var date: String,
@ColumnInfo(name = "productivity") var productivity: Int,
@ColumnInfo(name = "number_of_coffees") var numberOfCoffees: Int,
@ColumnInfo(name = "coffees_volume") var coffeesVolume: Int)
{
constructor() : this(null, "00/00/0000", 0, 0, 0)
}
Класс базы данных:
@Database(entities = [CoffeeProductivityData::class], version = 2)
abstract class CoffeeProductivityDatabase : RoomDatabase() {
abstract fun coffeeProductivityDao(): CoffeeProductivityDao
companion object {
private var dbInstance: CoffeeProductivityDatabase? = null
private val MIGRATION_1_2: Migration = object : Migration(1, 2) {
override fun migrate(database: SupportSQLiteDatabase) {
database.execSQL("ALTER TABLE 'coffee_productivity' ADD COLUMN 'coffees_volume' INTEGER DEFAULT 0")
}
}
fun getDatabase(context: Context): CoffeeProductivityDatabase? {
if (dbInstance == null) {
dbInstance = Room.databaseBuilder<CoffeeProductivityDatabase>(
context.applicationContext,
CoffeeProductivityDatabase::class.java,"coffee_productivity.db")
.addMigrations(MIGRATION_1_2)
.build()
}
return dbInstance
}
}
}