SugarORM：为什么listAll方法抛出NullPointerException？

Question

我这里有一个SugarRecord对象：

public class Options extends SugarRecord<Options> {
    public boolean includeNumbers;
    public boolean includeLowercase;
    public boolean includeUppercase;
    public int charCount;
    public String includedChars;

    public Options () {}

    public static class Builder {
        //builder thingys here
    }
}

我只会将一个Options对象保存到数据库中。我在名为Utility的类中创建了一个方法来获取此对象：

public static Options getOptions () {
    List<Options> optionsList = Options.listAll (Options.class);
    if (optionsList.size () == 0) {
        //return the default if there isn't an entry.
        return new Options.Builder ().setCharCount (8)
                .setIncludedChars ("")
                .setIncludeLowercase (true)
                .setIncludeNumbers (true)
                .setIncludeUppercase (false).build ();
    } else {
        return optionsList.get (0);
    }
}

现在，当我在活动中调用方法来读取对象时，会抛出NullPointerException。这是调用堆栈：

     Caused by: android.database.sqlite.SQLiteException: no such table: OPTIONS (code 1): , while compiling: SELECT * FROM OPTIONS
            at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
            at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
            at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
            at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
            at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
            at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
            at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
            at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1322)
            at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1169)
            at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1040)
            at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1246)
            at com.orm.SugarRecord.find(SugarRecord.java:208)
            at com.orm.SugarRecord.listAll(SugarRecord.java:134)
            at com.passwordgen.util.Utility.getOptions(Utility.java:94)
            at com.passwordgen.OptionsActivity.onCreate(OptionsActivity.java:34)
            at android.app.Activity.performCreate(Activity.java:5133)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2230)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2316)
            at android.app.ActivityThread.access$600(ActivityThread.java:150)
            at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1298)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:213)
            at android.app.ActivityThread.main(ActivityThread.java:5225)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
            at dalvik.system.NativeStart.main(Native Method)

我真的不明白为什么会发生这种情况，因为我使用SugarORM保存了其他一些东西，而且它们都很好。请告诉我如何解决这个问题。

我的猜测是我的糖记录包含一些无法放入表中的东西，可能是布尔值？但这应该没问题，我很确定SQL数据库可以存储布尔值。