Question

我的查询出于某种原因在DAO_Impl构建中显示语法错误。我尝试了重建，但是在执行以下查询时仍然出错：

查询：

@Query("UPDATE TasksTable SET daysOfWeek = :days WHERE taskID = :tkID")
    fun updateDays(tkID: Int, days: MutableList<Boolean>)

EntityTask：

data class EntityTask(
    var taskID: Int = 0,
    var personID : Int = 0,
    var name : String = "",
    var frequency: Int = 1,
    var interval: Int = 0,
    var haveSchedule: Boolean = false,
    var schedule: Int = 0,
    var scheduleString: String = "",
    var description: String = "",
    var showProgressLayout: Boolean = true,
    var daysOfWeek: MutableList<Boolean> =  mutableListOf(),
    var daysOfMonth: MutableList<Boolean> = mutableListOf(),
    var currentScores: ScoresCurrent = ScoresCurrent(),
    @Ignore
    var scores : MutableList<EntityScore> = mutableListOf()
)

DaoTasks_Impl：

 @Override
  public void updateDays(int tkID, List<Boolean> days) {
    StringBuilder _stringBuilder = StringUtil.newStringBuilder();
    _stringBuilder.append("UPDATE TasksTable SET daysOfWeek = ");
    final int _inputSize = days.size();
    StringUtil.appendPlaceholders(_stringBuilder, _inputSize);
    _stringBuilder.append(" WHERE taskID = ");
    _stringBuilder.append("?");
    final String _sql = _stringBuilder.toString();
    SupportSQLiteStatement _stmt = __db.compileStatement(_sql); //This is line 330

错误消息：

03-01 07:05:37.504 26855-27552/com.samuelriesterer.taskprogress E/SQLiteLog: (1) near "?": syntax error
03-01 07:05:37.514 26855-27552/com.samuelriesterer.taskprogress E/AndroidRuntime: FATAL EXCEPTION: Thread-23439
    Process: com.samuelriesterer.taskprogress, PID: 26855
    android.database.sqlite.SQLiteException: near "?": syntax error (code 1): , while compiling: UPDATE TasksTable SET daysOfWeek = ?,?,?,?,?,?,? WHERE taskID = ?
    #################################################################
    Error Code : 1 (SQLITE_ERROR)
    Caused By : SQL(query) error or missing database.
        (near "?": syntax error (code 1): , while compiling: UPDATE TasksTable SET daysOfWeek = ?,?,?,?,?,?,? WHERE taskID = ?)
    #################################################################
        at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
        at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1058)
        at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:623)
        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:1132)
        at android.arch.persistence.db.framework.FrameworkSQLiteDatabase.compileStatement(FrameworkSQLiteDatabase.java:64)
        at android.arch.persistence.room.RoomDatabase.compileStatement(RoomDatabase.java:244)
        at com.samuelriesterer.taskprogress.data.daos.DAOTasks_Impl.updateDays(DAOTasks_Impl.java:310)
        at com.samuelriesterer.taskprogress.data.Data$Companion$editTask$thread$1.run(Data.kt:569)
        at java.lang.Thread.run(Thread.java:818)

我为此有一个类型转换器，所以我不知道为什么它不会让我更新列表。我知道我的类型转换器可以工作，因为将列表添加到数据库时它可以工作。（它已添加到我的数据库中）。在UPDATE查询中使用时，它只是不起作用。

我的转换器：

@TypeConverter fun stringToListBoolean(value: String): MutableList<Boolean>
    {
        val list = mutableListOf<Boolean>()
        value.forEach { c ->
            if(c == 'F') list.add(false)
            else list.add(true)
        }
        return list
    }
@TypeConverter fun listBooleanToString(list: MutableList<Boolean>): String
{
    var value = ""
    for(i in list)
    {
        if(i) value += "T"
        else value += "F"
    }
    return value
}

Answer 1

对此修复程序不太满意，但最终我通过创建一个单独的类来实现我的目的，该类保存了daysOfWeek和daysOfMonth列表的值：

间隔：

SELECT  *
FROM    ( SELECT    ROW_NUMBER() OVER ( ORDER BY OrderDate ) AS RowNum, *
          FROM      Orders
          WHERE     OrderDate >= '1980-01-01'
        ) AS RowConstrainedResult
WHERE   RowNum >= 1
    AND RowNum < 20
ORDER BY RowNum

，然后为此添加了一个自定义转换器。现在我可以查询更新了：

class Interval(_daysOfWeek: MutableList<Boolean> = mutableListOf(false, false, false, false, false, false, false),
               _daysOfMonth: MutableList<Boolean> = mutableListOf(false, false, false, false, false, false, false, false, false,
                   false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false,
                   false, false, false, false, false, false)
)
{
    val daysOfWeek = _daysOfWeek
    val daysOfMonth = _daysOfMonth
}

Answer 2

因此，根据Jeel Vankhede的建议，我将MutableList更改为ArrayList，并且UPDATE查询起作用。 Impl版本的区别：

MutableList：

@Override
  public void test(int tkID, List<Boolean> test) {
    StringBuilder _stringBuilder = StringUtil.newStringBuilder();
    _stringBuilder.append("UPDATE TasksTable SET test = ");
    final int _inputSize = test.size();
    StringUtil.appendPlaceholders(_stringBuilder, _inputSize);
    _stringBuilder.append(" WHERE taskID = ");
    _stringBuilder.append("?");
    final String _sql = _stringBuilder.toString();
    SupportSQLiteStatement _stmt = __db.compileStatement(_sql);

ArrayList：

@Override
  public void test(int tkID, ArrayList<Boolean> test) {
    final SupportSQLiteStatement _stmt = __preparedStmtOfTest.acquire();
    __db.beginTransaction();
    try {
      int _argIndex = 1;
      final String _tmp;
      _tmp = Converters.listBooleanToString(test);
      if (_tmp == null) {
        _stmt.bindNull(_argIndex);
      } else {
        _stmt.bindString(_argIndex, _tmp);
      }
      _argIndex = 2;
      _stmt.bindLong(_argIndex, tkID);
      _stmt.executeUpdateDelete();
      __db.setTransactionSuccessful();
    } finally {
      __db.endTransaction();
      __preparedStmtOfTest.release(_stmt);
    }
  }

如您所见，ArrayList使用转换器，而MutableList不使用转换器。不确定为什么会这样吗？

在Room数据库中更新List <boolean>时，TypeConverter不起作用

2 个答案: