SQLiteConstraintException: column id is not unique (code 19) 更新行时的异常

SQLiteConstraintException: column id is not unique (code 19) exception when updating row

我的数据库中有一个 table,当添加新记录时,我正在使用 id.If 检查记录是否存在,我想更新记录,如果不存在添加新记录。但是我得到了例外:

2006-2259/? E/SQLiteDatabase﹕ Error inserting id=080333 phone=080333 total_owed=15050.0 total_debts=0 name=Alison Jones android.database.sqlite.SQLiteConstraintException: column id is not unique (code 19)

这是检查记录是否存在的方法:

 public boolean checkIfExists(String tableName, String value) {

    SQLiteDatabase database = this.getReadableDatabase();

    String Query = "Select * from " + tableName + " where " + DEBTOR_ID + " = " + value;
    Cursor cursor = database.rawQuery(Query, null);
    if(cursor.getCount() <= 0){
        cursor.close();
        return false;
    }
    cursor.close();
    return true;

}

这里正在使用它:

            debtor.setDebtorName(params[0]);
            debtor.setPhoneNumber(params[1]);
            debtor.setTotalAmountOwed(Double.parseDouble(params[6]));
            debtor.setTotalDebts(0);

            if (databaseHandler.checkIfExists(DebtDatabaseHandler.DEBTOR_TABLE_NAME, params[1])) {
                Log.d("NewDebtFragment", "Record already exist");
                databaseHandler.updateRecord(2, debtor.getTotalAmountOwed() + 50000);
            } else {
                debtorId = databaseHandler.addDebtor(debtor);
            }

由于这是一个冲突问题,显然不检查现有记录 working.I 不是因为代码看起来不错 (?)

这就是我创建 table 的方式:

String CREATE_DEBTOR_TABLE = "CREATE TABLE  " + DEBTOR_TABLE_NAME + " ( " +
            DEBTOR_ID + " TEXT PRIMARY KEY, " +
            DEBTOR_NAME + " TEXT, " +
            PHONE_NUMBER + " TEXT, "+
            TOTAL_DEBTS + " INTEGER, " +
            TOTAL_OWED + " INTEGER) ";

updateRecord方法:

 public void updateRecord(int newTotalDebt, double newTotalOwed) {

    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues contentValues = new ContentValues();
    contentValues.put(TOTAL_DEBTS, newTotalDebt);
    contentValues.put(TOTAL_OWED, newTotalOwed);

    db.update(DEBTOR_TABLE_NAME, contentValues, DEBTOR_ID, null);


}

用以下内容替换您的查询

 String Query = "Select * from " + tableName + " where " + DEBTOR_ID + " = '" + value+"'";

因为选择 value 是字符串,所以必须用单引号括起来。

更新:
无需编写一大堆代码来检查记录是否退出,如果退出然后更新该记录,您可以用简单的一行替换所有这些东西。

database.insertWithOnConflict(table,null,values,SQLiteDatabase.CONFLICT_REPLACE);

它将在内部处理异常,CONFLICT_REPLACE它指定当发生 UNIQUE 约束违规时,在插入或更新当前行之前删除导致约束违规的预先存在的行。