执行 tx.executeSql 后检索更新的行

Question

我正在使用react-native-sqlite-storage在我的React Native应用程序中维护书籍数据。我正在使用

updateData()

来更新书籍的数据：

async function updateData({ book_id, author, price }) {
  return new Promise((resolve, reject) => {
    return db.transaction(tx => {
      return tx.executeSql(
        'UPDATE books SET author = ?, price = ? where book_id= ? ',
        [author, price, book_id],
        (tx, res) => {
          console.log(
            ' data updated',
            tx,
            '\nres===>',
            res,
          );
          resolve(true);
        },
        error => {
          console.log('insert data error in updateData: ', error);
          reject(false);
        },
      );
    });
  });
}

console.log()

结果：

data updated {"db": {"dbname": "test.db", "openError": [Function errorcb], "openSuccess": [Function errorcb], "openargs": {"dblocation": "nosync", "name": "test.db"}}, "error": undefined, "executes": [], "fn": [Function anonymous], "readOnly": false, "success": undefined, "txlock": true}
res===> {"insertId": undefined, "rows": {"item": [Function item], "length": 0, "raw": [Function raw]}, "rowsAffected": 1}

我想获取更新的行数据作为响应。我怎样才能做到这一点？我尝试控制台记录执行查询后返回的值。

Answer 1

更新sql不会返回结果，需要更新，然后选择相同的记录。这是一个例子：

db.transaction(tx => {
  tx.executeSql(
    'UPDATE table_name SET column_name = ? WHERE id = ?',
    [newValue, id],
    (tx, results) => {
      console.log('Update completed');

      // Query the updated record
      tx.executeSql(
        'SELECT * FROM table_name WHERE id = ?',
        [id],
        (tx, results) => {
          if (results.rows.length > 0) {
            const updatedRecord = results.rows.item(0);
            console.log('Updated record: ', updatedRecord);
          } else {
            console.log('Record not found');
          }
        },
        error => {
          console.log('Error during select: ', error);
        }
      );
    },
    error => {
      console.log('Error during update: ', error);
    }
  );
});