我正在尝试运行一个将数据插入表中的sql函数。我按照here解释的示例,但每当我运行脚本时,我都会收到错误" ValueError:View函数没有返回响应"
我的代码如下所示:
from flask import render_template, flash, redirect, request
from app import app
from .forms import LoginForm
from .forms import RegistrationForm
import sqlite3 as sql
@app.route('/')
@app.route('/index')
@app.route('/registration', methods = ['GET','POST'])
def registration():
form = RegistrationForm()
if request.method == 'POST':
try:
card_id = request.form['card_id']
pin = request.form['pin']
account_id = request.form['account_id']
with sql.connect("testDB.db") as con:
cur = con.cursor()
cur.execute("INSERT INTO atm_card (card_id,pin,account_id) VALUES (?,?,?,?)",(card_id,pin,account_id) )
con.commit()
msg = "Record successfully added"
except:
con.rollback()
msg = "error in insert operation"
finally:
return render_template("index.html",msg = msg)
con.close()
我可能做错了什么?
答案 0 :(得分:0)
如果请求方法是GET,会返回什么?您只在POST请求上呈现模板。纠正它。
@app.route('/registration', methods = ['GET','POST'])
def registration():
form = RegistrationForm()
if request.method == 'POST':
try:
card_id = request.form['card_id']
pin = request.form['pin']
account_id = request.form['account_id']
with sql.connect("testDB.db") as con:
cur = con.cursor()
cur.execute("INSERT INTO atm_card (card_id,pin,account_id) VALUES (?,?,?,?)",(card_id,pin,account_id) )
con.commit()
msg = "Record successfully added"
except:
con.rollback()
msg = "error in insert operation"
finally:
return render_template("index.html",msg = msg)
con.close()
else:
return render_template('index.html', form=form)