mysql.connector.errors.ProgrammingError：游标未连接

问题描述

在要搜索的条目页面上写了单词并且单词中的字母进入/ search4后，我在 MysqL.connector.errors.ProgrammingError：未连接光标的页面上得到错误检查这里的代码后。

from flask import Flask,render_template,request,escape
from vsearch import search4letters
from DBcm import UseDatabase

app = Flask(__name__)

app.config['dbconfig'] = {'host': '127.0.0.1','user': 'vsearch','password': 'vsearchpasswd','database': 'vsearchlogDB',}

def log_request(req: 'flask_request',res: str) -> None:
    with UseDatabase(app.config['dbconfig']) as cursor:
        _sql = """insert into log
                (phrase,letters,ip,browser_string,results)
                values
                (%s,%s,%s)"""
    cursor.execute(_sql,(req.form['phrase'],req.form['letters'],req.remote_addr,req.user_agent.browser,res,))

@app.route('/search4',methods=['POST'])
def do_search() -> 'html':
    phrase = request.form['phrase']
    letters = request.form['letters']
    title = 'Here are your results:'
    results = str(search4letters(phrase,letters))
    log_request(request,results)
    return render_template('results.html',the_title=title,the_phrase=phrase,the_letters=letters,the_results=results,)

@app.route('/')
@app.route('/entry')
def entry_page() -> 'html':
    return render_template('entry.html',the_title='Welcome to search4letters on the web!')

@app.route('/viewlog')
def view_the_log() -> 'html':
    with UseDatabase(app.config['dbconfig']) as cursor:
        _sql = """select phrase,results
                  from log"""
        cursor.execute(_sql)
        contents = cursor.fetchall()
    titles = ('Phrase','Letters','Remote_addr','User_agent','Results')
    return render_template('viewlog.html',the_title='View Log',the_row_titles=titles,the_data=contents,)
if __name__ == '__main__':
    app.run(debug=True)

解决方法

cursor.execute调用应位于with块内，因为cursor仅存在于该块内。

这实际上是一个缩进：

def log_request(req: 'flask_request',res: str) -> None:
    with UseDatabase(app.config['dbconfig']) as cursor:
        _SQL = """insert into log
                (phrase,letters,ip,browser_string,results)
                values
                (%s,%s,%s)"""
        cursor.execute(_SQL,(req.form['phrase'],req.form['letters'],req.remote_addr,req.user_agent.browser,res,))

connector mysql python