execute raise ProgrammingError( mysql.connector.errors.ProgrammingError: Not all parameters were used in the SQL statement
时间: 2024-03-02 12:20:03 浏览: 186
这个错误通常发生在使用参数化 SQL 语句时,语句中的参数和提供的参数数量不匹配。这可能是因为你在 SQL 语句中使用了更多的参数,或者是因为你没有正确地传递参数。为了解决这个问题,你可以检查 SQL 语句和提供的参数是否匹配,并确保提供的参数数量和类型与 SQL 语句中的参数一致。另外,你也可以通过打印 SQL 语句和提供的参数来帮助你找到问题所在。
相关问题
ProgrammingError mysql.connector.errors.ProgrammingError: Not all parameters were used in the SQL statement
从提供的代码来看,这个Flask应用使用的是SQLite数据库,而不是MySQL。因此,出现`mysql.connector.errors.ProgrammingError`异常的原因可能是代码中某个地方误用了MySQL相关的库或语法。
以下是一些可能的问题及解决方案:
1. **检查数据库连接**:
确保所有数据库操作都使用了正确的SQLite库(`sqlite3`),而没有混用MySQL库(如 `mysql.connector`)。
2. **SQL语句中的参数占位符**:
SQLite 使用问号 (`?`) 作为参数占位符,而 MySQL 使用百分号加字母的形式(如 `%s`)。如果在SQL语句中使用了MySQL的占位符格式,会导致错误。
3. **检查具体的SQL语句**:
检查所有SQL查询语句,确保参数占位符正确无误。例如:
```python
cursor.execute('INSERT INTO users (username, password) VALUES (?, ?)', (username, hashed_password))
```
4. **调试信息**:
在抛出异常的地方添加更多的调试信息,以便定位具体是哪条SQL语句导致了问题。例如:
```python
try:
cursor.execute('INSERT INTO users (username, password) VALUES (?, ?)', (username, hashed_password))
conn.commit()
except sqlite3.ProgrammingError as e:
logging.error(f"SQL Error: {e}")
logging.error(f"Query: INSERT INTO users (username, password) VALUES (?, ?)")
logging.error(f"Params: ({username}, {hashed_password})")
```
5. **确保所有参数都被使用**:
确认每个SQL语句中的所有参数都在执行时被正确传入。例如,确保 `cursor.execute` 方法调用中的参数列表与SQL语句中的占位符数量匹配。
通过以上步骤,可以逐步排查并解决 `mysql.connector.errors.ProgrammingError` 异常。如果你能提供更具体的报错位置或上下文,我可以进一步帮助你定位问题。
ProgrammingError mysql.connector.errors.ProgrammingError: Not all parameters were used in the SQL statement修改错误
在您的代码中,`mysql.connector` 使用的是 `%s` 占位符来表示参数化查询,而您在某些地方使用了 `?` 占位符。这会导致 `ProgrammingError`,因为 `mysql.connector` 不支持 `?` 占位符。
以下是修改后的代码片段,将所有 `?` 占位符替换为 `%s`:
```python
from flask import Flask, render_template, request, redirect, url_for, flash, session
import mysql.connector
import bcrypt
import logging
app = Flask(__name__)
app.secret_key = 'your_secret_key'
# 配置日志
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
# 数据库连接
def connect_db():
conn = mysql.connector.connect(
host='localhost',
port=3306,
user='root',
password='123456',
database='pet_weight_management'
)
return conn
# 初始化数据库
def init_db():
conn = connect_db()
cursor = conn.cursor()
cursor.execute('''
CREATE TABLE IF NOT EXISTS users (
id INT AUTO_INCREMENT PRIMARY KEY,
username VARCHAR(255) UNIQUE NOT NULL,
password VARCHAR(255) NOT NULL
)
''')
cursor.execute('''
CREATE TABLE IF NOT EXISTS pets (
id INT AUTO_INCREMENT PRIMARY KEY,
user_id INT NOT NULL,
pet_name VARCHAR(255) NOT NULL,
FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
)
''')
cursor.execute('''
CREATE TABLE IF NOT EXISTS pet_weights (
id INT AUTO_INCREMENT PRIMARY KEY,
pet_id INT NOT NULL,
weight DECIMAL(10, 2) NOT NULL,
recorded_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
FOREIGN KEY (pet_id) REFERENCES pets (id) ON DELETE CASCADE
)
''')
conn.commit()
conn.close()
@app.route('/')
def index():
return render_template('index.html')
@app.route('/register', methods=['GET', 'POST'])
def register():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
conn = connect_db()
cursor = conn.cursor()
hashed_password = bcrypt.hashpw(password.encode('utf-8'), bcrypt.gensalt())
try:
cursor.execute('INSERT INTO users (username, password) VALUES (%s, %s)', (username, hashed_password))
conn.commit()
flash("注册成功!", 'success')
logging.info("用户 %s 注册成功!", username)
return redirect(url_for('login'))
except mysql.connector.IntegrityError:
flash("用户名已存在!", 'warning')
logging.warning("用户名 %s 已存在!", username)
finally:
conn.close()
return render_template('register.html')
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
conn = connect_db()
cursor = conn.cursor()
cursor.execute('SELECT id, password FROM users WHERE username = %s', (username,))
result = cursor.fetchone()
if result and bcrypt.checkpw(password.encode('utf-8'), result[1]):
session['user_id'] = result[0]
flash("登录成功!", 'success')
logging.info("用户 %s 登录成功!", username)
return redirect(url_for('dashboard'))
else:
flash("用户名或密码错误!", 'danger')
logging.warning("用户名或密码错误!")
conn.close()
return render_template('login.html')
@app.route('/logout')
def logout():
session.pop('user_id', None)
flash("已退出登录。", 'info')
logging.info("已退出登录。")
return redirect(url_for('index'))
@app.route('/dashboard')
def dashboard():
if 'user_id' not in session:
return redirect(url_for('login'))
user_id = session['user_id']
conn = connect_db()
cursor = conn.cursor()
cursor.execute('SELECT id, pet_name FROM pets WHERE user_id = %s', (user_id,))
pets = cursor.fetchall()
conn.close()
return render_template('dashboard.html', pets=pets)
@app.route('/add_pet', methods=['GET', 'POST'])
def add_pet():
if 'user_id' not in session:
return redirect(url_for('login'))
if request.method == 'POST':
user_id = session['user_id']
pet_name = request.form['pet_name']
weight = float(request.form['weight'])
conn = connect_db()
cursor = conn.cursor()
cursor.execute('INSERT INTO pets (user_id, pet_name) VALUES (%s, %s)', (user_id, pet_name))
pet_id = cursor.lastrowid
cursor.execute('INSERT INTO pet_weights (pet_id, weight) VALUES (%s, %s)', (pet_id, weight))
conn.commit()
flash("宠物添加成功,初始体重为 %.2f kg" % weight, 'success')
logging.info("宠物 %s 添加成功,初始体重为 %.2f kg", pet_name, weight)
conn.close()
return redirect(url_for('dashboard'))
return render_template('add_pet.html')
@app.route('/view_pet/<int:pet_id>')
def view_pet(pet_id):
if 'user_id' not in session:
return redirect(url_for('login'))
conn = connect_db()
cursor = conn.cursor()
cursor.execute('SELECT pet_name FROM pets WHERE id = %s', (pet_id,))
pet = cursor.fetchone()
if not pet:
flash("宠物不存在!", 'warning')
logging.warning("宠物不存在!")
return redirect(url_for('dashboard'))
cursor.execute('SELECT weight, recorded_at FROM pet_weights WHERE pet_id = %s ORDER BY recorded_at', (pet_id,))
weights = cursor.fetchall()
conn.close()
return render_template('view_pet.html', pet=pet, weights=weights)
@app.route('/update_pet_weight/<int:pet_id>', methods=['GET', 'POST'])
def update_pet_weight(pet_id):
if 'user_id' not in session:
return redirect(url_for('login'))
conn = connect_db()
cursor = conn.cursor()
# 获取当前宠物的所有体重记录
cursor.execute('SELECT weight, recorded_at FROM pet_weights WHERE pet_id = %s ORDER BY recorded_at DESC', (pet_id,))
weights = cursor.fetchall()
if request.method == 'POST':
weight = float(request.form['weight'])
cursor.execute('INSERT INTO pet_weights (pet_id, weight) VALUES (%s, %s)', (pet_id, weight))
conn.commit()
flash("宠物体重更新成功!", 'success')
logging.info("宠物体重更新成功!")
conn.close()
return redirect(url_for('view_pet', pet_id=pet_id))
conn.close()
return render_template('update_pet_weight.html', pet_id=pet_id, weights=weights)
@app.route('/delete_account', methods=['GET', 'POST'])
def delete_account():
if 'user_id' not in session:
return redirect(url_for('login'))
if request.method == 'POST':
user_id = session['user_id']
conn = connect_db()
cursor = conn.cursor()
try:
# 删除宠物的体重记录
cursor.execute('DELETE FROM pet_weights WHERE pet_id IN (SELECT id FROM pets WHERE user_id = %s)', (user_id,))
# 删除宠物信息
cursor.execute('DELETE FROM pets WHERE user_id = %s', (user_id,))
# 删除用户信息
cursor.execute('DELETE FROM users WHERE id = %s', (user_id,))
conn.commit()
session.pop('user_id', None)
flash("账号已注销。", 'success')
logging.info("用户 %s 账号已注销。", user_id)
except Exception as e:
flash("注销账号失败: %s" % str(e), 'danger')
logging.error("注销账号失败: %s", str(e))
finally:
conn.close()
return redirect(url_for('index'))
return render_template('delete_account.html')
if __name__ == '__main__':
init_db()
app.run(debug=True)
```
请注意,所有的 `?` 占位符都已被替换为 `%s`,以符合 `mysql.connector` 的要求。这样可以避免 `ProgrammingError` 错误。
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