完成注册功能
- js文件: onclick函数return True时才提交表单,return False时不提交表单。
- html文件:
- <form>中设置 action和method="post"
- <input> 中设置 name
- 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,request,redirect,url_for,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)
# db.create_all()
@app.route('/')
def base():
return render_template('base.html')
@app.route('/first/')
def shouye():
return render_template('first.html')
@app.route('/login/')
def login():
return render_template('login.html')
@app.route('/zhuce/',methods=['GET','POST'])
def zhuce():
if request.method == 'GET':
return render_template('zhuce.html')
else:
usern = request.form.get('username')
passw = request.form.get('password')
user = User.query.filter(User.username == usern).first()
if user:
return u'username existed'
else:
user1 = User(username=usern, password=passw)
db.session.add(user1)
db.session.commit()
return redirect(url_for('login'))
if __name__ == '__main__':
app.run(debug=True)
注册html:
{% extends'base.html' %} {% block title %} 注册 {% endblock %} {% block head %} <link rel="stylesheet"type="text/css"href="{{url_for('static',filename="css/zhuce.css") }}"> <script src="{{url_for('static',filename="js/zhuce.js") }}"></script> {% endblock %} {% block main %} <body> <div class="aa" > <div class="zhuce" ><h2>新用户注册</h2></div> <form action="{{ url_for('zhuce')}}" method="post"> <div class="aa1" > 请输入账号:<input id="username" type="text" name="username" placeholder="请输入用户名"><br> 请输入密码:<input id="password" type="password" name="password" placeholder="请输入密码"><br> 请确认密码:<input id="password2" type="password"placeholder="请再次输入密码"><br> </div> <div id="error_box"><br></div> <div class="aa2" > <button onclick="return myLogin()" type="submit" name="commit">注册</button> </div> </div> </body> {% endblock %}
注册js:
function myLogin() { var oUname = document.getElementById("name") var oError = document.getElementById("error_box") var opassword = document.getElementById("password") var opassword2 = document.getElementById("password2") oError.innerHTML = "<br>" if(oUname.value.length<6||oUname.value.length>12){ oError.innerHTML="用户名需为6-12位"; return false; } else if ((oUname.value.charCodeAt(0)>=48) && oUname.value.charCodeAt(0)<=57){ oError.innerHTML="首字母不能是数字"; 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="只能包含字母和数字"; return false; } } if(opassword.value.length<6||opassword.value.length>12){ oError.innerHTML="密码需为6-12位"; return false; } if(opassword2.value!=opassword.value){ oError.innerHTML="密码不一致"; return false; } //window.alert("注册成功!") return true; }