Database Error

What This Error Means

This error occurs when you try to retrieve data from a database using a SQL query that does not return any results.

Why It Happens

This can happen when you pass a non-existent or incorrect user ID to the query, or when the database table is empty. It can also occur if the query itself is incorrect, such as a typo in the table name or a missing WHERE clause.

How to Fix It

1. 1To fix this error, you should verify that the user ID passed to the query is correct and exists in the database. You can do this by checking the database manually or by implementing additional error checking in your code. Additionally, make sure the SQL query is correct and returns the expected results.

Example Code Solution

class UserManager:
  def get_user(self, user_id):
    cursor = self.conn.cursor()
    cursor.execute('SELECT * FROM users WHERE id = ?', (user_id,))
    result = cursor.fetchone()
    return result

class UserManager:
  def get_user(self, user_id):
    cursor = self.conn.cursor()
    cursor.execute('SELECT * FROM users WHERE id = ?', (user_id,))
    result = cursor.fetchone()
    if result is None:
      # Handle the case where the user ID does not exist
      return None
    return result