- js文件： onclick函数return True时才提交表单，return False时不提交表单。
function fnRegist() { var oUname = document.getElementById("name"); var oError = document.getElementById("error_box"); var oUpass = document.getElementById("password"); var oCheckpass = document.getElementById("password2"); var isError =true; if(oUname.value.length<6||oUname.value.length>20){ oError.innerHTML="name:6-20位"; return false; }else if(oUname.value.charCodeAt(0)>=48&&oUname.value.charCodeAt(0)<=57){ oError.innerHTML="first letter."; return false; }else for(var i=0;i<oUname.value.length;i++){ if((oUname.value.charCodeAt(i)<48||oUname.value.charCodeAt(i)>57)&&(oUname.value.charCodeAt(i)<97||oUname.value.charCodeAt(i)>122)){ oError.innerHTML="only letter or number"; return false; } } if(oUpass.value.length<6||oUpass.value.length>20){ oError.innerHTML="password:6-20"; return false; } if(oCheckpass.value!=oUpass.value) { oError.innerHTML = "sorry,the password is false"; return false; } window.alert("注册成功"); return true; }
- html文件：
- <form>中设置 action和method="post"
- <input> 中设置 name
<{% extends 'index.html' %}
{% block title %}注册{% endblock %}
{% block head %}
<link href="../static/css/regist.css" rel="stylesheet" type="text/css">
<script src="../static/js/regist.js"></script>
{% endblock %}
{% block main %}
<body class="bg">
<div id="container">
<<div class="box">
<h1 id="zhuce">注册</h1>
<div class="box">
<form action="{{ url_for('regist') }}" method="post" >
<div class="input_box">
<input id="name" name="username"type="text"placeholder="请输入用户名"><br>
</div>
<br>
<div class="input_box">
<input id="password" name="password"type="password"placeholder="请输入密码"><br><br>
<input id="password2" name="password2"type="password"placeholder="请确认密码"><br>
</div>
<br>
<div id="error_box"><br></div>
<div class="input_box">
<button onclick="fnLogin()">注册</button>
</div>
<br></form>
</div>
</div>
</body>
{% endblock %}
</html>
- 主py文件中：
- from flask import request, redirect, url_for
- @app.route('/regist/', methods=['GET', 'POST’])
def regist():
if request.method == 'GET':
return render_template('regist.html')
else:
username = request.form.get(‘username’)#获取form中的数据
判断用户名是否存在:存在报错
不存在，存到数据库中
redirect重定向到登录页
-
from flask import Flask, render_template,redirect,url_for,request,session
from flask_sqlalchemy import SQLAlchemy
import config
app = Flask(__name__)
app.config.from_object(config)
db = SQLAlchemy(app)
class User(db.Model):
__tablename__ = 'user'
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
username = db.Column(db.String(20), nullable=False)
password = db.Column(db.String(20), nullable=False)
nickname = db.Column(db.String(20))
# db.create_all()
@app.route('/')
def index():
return render_template('index.html')
@app.route('/regist/',methods=['GET','POST'])
def regist():
if request.method == 'GET':
return render_template("regist.html")
else:
username = request.form.get("username")
password = request.form.get("password")
user = User.query.filter(User.username == username).first()
if user:
return 'username existed.'
else:
user = User(username=username, password=password)
db.session.add(user) #数据库，添加操作
db.session.commit()
return redirect(url_for('login'))
@app.route('/login/')
def login():
return render_template("login.html")
if __name__ == '__main__':
app.run(debug=True)
