在android中找不到列項目名稱

代碼在我的數據庫輔助類：

public void onCreate(SQLiteDatabase db) { 
    db.execSQL(DATABASE_CREATE); 
    db.execSQL(CREATE_ITEM_DB); 
} 

public static final String ITEM_NAME = "item_name"; 
public static final String ITEM_STATUS = "item_status"; 
public static final String ITEM_DESCRIPTION = "item_description"; 
public static final String ITEM_CATEGORY = "item_category"; 
public static final String ITEM_ROW_ID = "row_id"; 
private static final String ITEM_TABLE = "table_of_items"; 

    public static final String CREATE_ITEM_DB = "CREATE TABLE " 
      + ITEM_TABLE + "(" + ITEM_ROW_ID + 
     " INTEGER PRIMARY KEY AUTOINCREMENT," + ITEM_NAME 
      + " TEXT NOT NULL," + ITEM_STATUS + " TEXT NOT NULL," + ITEM_DESCRIPTION + " TEXT," + ITEM_CATEGORY + " TEXT NOT NULL," + 
      KEY_NAME + " TEXT);";

現在，在另一個類我稱之爲：

public void list(){ 
myModel.open(); 
current_user = myModel.getCurUser(); 
Item [] items = (myModel.getLostItems(current_user)); 
if(items != null){ 
    myView.setItem(items); 
} 

myModel.close();

}

基於myModel是我的數據庫類。它包含一個實例給我的數據庫輔助類和我的sqlite數據庫。此外，myModel.open（）獲取可寫的數據庫。

錯誤消息非常明確：item_name不是列。

但它確實看起來像它。

編輯：玩過後，我決定它不是關於這個特殊的列。看來任何列我放在列數組結果在相同的錯誤消息。

編輯2：這裏是我的getLostItems：

 public Item[] getLostItems(String current_user) { 
    String [] columns = new String [] {DB_Helper.ITEM_NAME, 
      DB_Helper.ITEM_STATUS, 
      DB_Helper.ITEM_DESCRIPTION, 
      DB_Helper.ITEM_CATEGORY, 
      DB_Helper.ITEM_ROW_ID, 
      DB_Helper.KEY_NAME}; 
    Cursor c = database.query(DB_Helper.DATABASE_TABLE_USERS, columns, DB_Helper.KEY_NAME + " = ? AND " + DB_Helper.ITEM_STATUS + " = ?", 
      new String[] {current_user, "lost"}, 
      null, 
      null, 
      null);

從技術上講，有一點點的代碼，但通過與調試程序的代碼走之後，在查詢語句失敗。

登錄：

03-02 16:44:56.375: E/SQLiteLog(16362): (1) no such column: item_name 
03-02 16:44:56.375: D/AndroidRuntime(16362): Shutting down VM 


03-02 06:47:46.825: E/AndroidRuntime(6760): FATAL EXCEPTION: main 
03-02 06:47:46.825: E/AndroidRuntime(6760): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.wheresmystuff/com.example.wheresmystuff.View.DisplayItems}: android.database.sqlite.SQLiteException: no such column: item_name (code 1): , while compiling: SELECT item_name, item_status, item_description, item_category, row_id, id_name FROM reg_users_table WHERE id_name = ? AND item_status = ? 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.app.ActivityThread.access$600(ActivityThread.java:141) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.os.Handler.dispatchMessage(Handler.java:99) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.os.Looper.loop(Looper.java:137) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.app.ActivityThread.main(ActivityThread.java:5041) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at java.lang.reflect.Method.invokeNative(Native Method) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at java.lang.reflect.Method.invoke(Method.java:511) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at dalvik.system.NativeStart.main(Native Method) 
03-02 06:47:46.825: E/AndroidRuntime(6760): Caused by: android.database.sqlite.SQLiteException: no such column: item_name (code 1): , while compiling: SELECT item_name, item_status, item_description, item_category, row_id, id_name FROM reg_users_table WHERE id_name = ? AND item_status = ? 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1161) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1032) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1200) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at com.example.wheresmystuff.Model.DB.getLostItems(DB.java:180) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at com.example.wheresmystuff.Presenter.ListingPresenter.list(ListingPresenter.java:33) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at com.example.wheresmystuff.Presenter.ListingPresenter.<init>(ListingPresenter.java:26) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at com.example.wheresmystuff.View.DisplayItems.onCreate(DisplayItems.java:26) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.app.Activity.performCreate(Activity.java:5104) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
03-02 06:47:46.825: E/AndroidRuntime(6760):  ... 11 more

來源

2013-03-02 user678392

你從哪裏得到那個錯誤信息？ – sandrstar 2013-03-02 06:28:07

@sandrstar登錄貓 – user678392 2013-03-02 06:32:30

可以請粘貼myModel.getLostItems（）方法代碼嗎？ – 2013-03-02 07:11:13

您有一個額外的逗號而不是

KEY_NAME + " TEXT,

應該

KEY_NAME + " TEXT);"

來源

2013-03-02 06:48:30

對不起，本意是要編輯出來的。糾正後，它仍然不起作用。 – user678392 2013-03-02 06:54:09

發佈您的查詢語句。看來你需要一個文字在你的查詢中。 – 2013-03-02 06:56:43

完成。我發佈了查詢。我仍然不明白爲什麼它不起作用 – user678392 2013-03-02 17:00:28

這裏，顯示基於myModel select語句錯誤消息。 getLostItems（）方法，請檢查是否在查詢中爲item_name列傳遞了正確的參數。

來源

2013-03-02 07:38:02

是的，我剛剛發佈我的查詢語句。我甚至沒有在我的查詢語句中使用item_name。 – user678392 2013-03-02 16:28:23

在android中找不到列項目名稱

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