Question

1.1.0版房间。

迁移后第一次运行时出现此错误。

如果我关闭应用并重新启动它，它运行良好。

ROOM: Cannot run invalidation tracker. Is the db closed?
java.lang.IllegalStateException: Cannot perform this operation because the connection pool has been closed.
    at android.database.sqlite.SQLiteConnectionPool.throwIfClosedLocked(SQLiteConnectionPool.java:1182)
    at android.database.sqlite.SQLiteConnectionPool.waitForConnection(SQLiteConnectionPool.java:792)
    at android.database.sqlite.SQLiteConnectionPool.acquireConnection(SQLiteConnectionPool.java:518)

Caused By : SQL(query) error or missing database.
    (no such table: room_table_modification_log (code 1): , while compiling: DELETE FROM proposals WHERE hotel_id = ?)
#################################################################
    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1095)
    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:660)
    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:59)
    at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
    at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1417)
    at android.arch.persistence.db.framework.FrameworkSQLiteDatabase.compileStatement(FrameworkSQLiteDatabase.java:64)
    at android.arch.persistence.room.RoomDatabase.compileStatement(RoomDatabase.java:244)
    at android.arch.persistence.room.SharedSQLiteStatement.createNewStatement(SharedSQLiteStatement.java:65)
    at android.arch.persistence.room.SharedSQLiteStatement.getStmt(SharedSQLiteStatement.java:77)
    at android.arch.persistence.room.SharedSQLiteStatement.acquire(SharedSQLiteStatement.java:87)
    at com.hotellook.db.dao.FavoritesDao_Impl.removeProposals(FavoritesDao_Impl.java:723)

数据库初始化代码如下所示（Dagger AppModule）

@Provides
@Singleton
fun provideDataBase(app: Application): AppDatabase =
  Room.databaseBuilder(app, AppDatabase::class.java, DATABASE_NAME)
      .addMigrations(MIGRATION_1_2)
      .addMigrations(MIGRATION_2_3)
      .build()

private companion object {
  const val DATABASE_NAME = "app.db"

  val MIGRATION_1_2 = object : Migration(1, 2) {
    override fun migrate(database: SupportSQLiteDatabase) {
      database.execSQL("ALTER TABLE table1 ADD COLUMN column0 TEXT;")
      database.execSQL("ALTER TABLE table2 ADD COLUMN column0 TEXT;")
    }
  }

  val MIGRATION_2_3 = object : Migration(2, 3) {
    override fun migrate(database: SupportSQLiteDatabase) {
      database.execSQL("CREATE TABLE table0 (column1 INTEGER NOT NULL, column2 TEXT NOT NULL, PRIMARY KEY(column1))")
      database.execSQL("ALTER TABLE table1 ADD COLUMN column1 TEXT;")
      database.execSQL("ALTER TABLE table1 ADD COLUMN column2 TEXT;")
      database.execSQL("ALTER TABLE table1 ADD COLUMN column3 REAL;")
      database.execSQL("ALTER TABLE table2 ADD COLUMN column1 TEXT;")
      database.execSQL("ALTER TABLE table2 ADD COLUMN column2 REAL;")
      database.execSQL("ALTER TABLE table3 ADD COLUMN column1 INTEGER DEFAULT 0;")
      database.execSQL("ALTER TABLE table3 ADD COLUMN column2 TEXT;")
    }
  }

应用程序从版本2升级到3。我该如何解决？

Answer 1

将版本更改为1.1.1-rc1，这个源自Google自己代码的无意义错误将不再发生，我已经在众多设备上测试了相同的场景。

另见question/answer here

Answer 2

我修复了此崩溃。我的私钥类型和外键类型不相等，

设置相等类型后，不会发生崩溃

房间迁移：“没有这样的表：room_table_modification_log”

2 个答案: