import androidx.annotation.NonNull;
import androidx.room.ColumnInfo;
import androidx.room.Entity;
+import androidx.room.Index;
import androidx.room.PrimaryKey;
-@Entity(tableName = "currencies")
+@Entity(tableName = "currencies",
+ indices = {@Index(name = "currency_name_idx", unique = true, value = "name")})
public class Currency {
@PrimaryKey(autoGenerate = true)
private long id;