本次学习遇到坑，不知道为什么loginFrom类如果继承FlaskForm，那么loginForm类的对象myform的validate()方法返回一直是false，此时要在html文件表单最后加上{{ form.csrf_token }}。
但是我不知道是什么意思，我也不想加，就把loginFrom类继承Form，那么不加
{{ form.csrf_token }}，也可以正常获得取值逻辑运行正常
# Python版本：3.7.4
#db.py
from pymysql import connect
DIALECT = 'mysql'
DRIVER = 'pymysql'
USERNAME = 'root'
PASSWORD = '123456'
HOST = 'localhost'
PORT = '3306'
DATABASE = 'test1'
conn = connect('localhost','root','123456','test1')
cur = conn.cursor()
def addUser(username,password):
sql = "insert into user(username,password) values ('%s','%s')" % (username,password)
cur.execute(sql)
conn.commit()
conn.close()
def isExist(username,password):
sql = "select *from user where username = '%s' and password = '%s'" %(username,password)
cur.execute(sql)
result = cur.fetchall()
if (len(result)==0):
return False
else:
return True
# 需求：使用flask框架，配合HTML和JS程序，编写两个页面，第一个页面允许用户填入用户名和密码进行注册，第二个页面登录
# app.py
from flask import Flask, render_template, request, redirect
from db import *
app = Flask(__name__)
app.secret_key = 'development key'
from wtforms import StringField, PasswordField, validators, Form
class loginForm(Form):
username = StringField("username", [validators.DataRequired()])
password = PasswordField("password", [validators.DataRequired()])
@app.route('/user', methods=["POST", "GET"])
def login():
myform = loginForm(request.form)
if request.method == "POST":
username = myform.username.data
password = myform.password.data
aaa = myform.validate()
if isExist(username,password) and myform.validate():
return redirect('http://www.baidu.com')
else:
message = 'login failed'
return render_template('index.html', message=message, form=myform)
return render_template('index.html', form=myform)
@app.route('/register', methods=["POST", "GET"])
def register():
myForm = loginForm(request.form)
if request.method == "POST":
addUser(myForm.username.data, myForm.password.data)
return "注册成功"
return render_template('index.html', form=myForm)
if __name__ == '__main__':
app.run(debug=True)
<!-- index.html -->
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<form action="/user" method="POST">
{% if message%}
{{message}}
{%endif%}
<br>
name
<br>
{{form.username}}
<br>
password
<br>
{{form.password}}
<br>
<input type="submit" value="提交">
<br>
<input type="reset" value="reset">
#{{ form.csrf_token }}
</form>
</body>
</html>
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