完成注册功能

1. js文件： onclick函数return True时才提交表单，return False时不提交表单。
2. html文件：
   1. <form>中设置 action和method="post"
   2. <input> 中设置 name
3. 主py文件中：
   1. from flask import  request, redirect, url_for
   2. @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

        存到数据库中

        redirect重定向到登录页

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

function fnRefist() {     var oUname = document.getElementById("uname")     var oError = document.getElementById("error_box")     var oUpass = document.getElementById("upass")     var oUpass1 = document.getElementById("upass1")       oError.innerHTML = "<br>"     if (oUname.value.length < 6 || oUname.value.length > 20) {         oError.innerHTML = "用户名必须在6-20之间";         return;     } else if ((oUname.value.charCodeAt(0) >= 48) && (oUname.value.charCodeAt(0) <= 57)) {         oError.innerHTML = "首字母不能为数字";         return;     } 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 = "只能填写数字或字母";             return;         }     }     // oUpass     if (oUpass.value.length > 20 || oUpass.value.length < 6) {         oError.innerHTML = "密码必须在6-20之间";         return;     } else if (oUpass.value!= oUpass1.value) {         document.getElementById("error_box").innerHTML = "两次密码不一致"         return false;     }     return true;     window.alert("注册成功！")

　　

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

{% extends'index.html' %}   {% block title %}注册 {% endblock %}   {% block head %}     <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='css/886.css') }}">     <script src="{{ url_for('static',filename='js/00.js')}}"></script> {% endblock %}   {% block main %}     <div class="box">         <h2 class="dd">注册</h2>         <form action="{{ url_for('regist') }}"method="post">         <div class="input_box">             <input id="uname" type="text" placeholder="请输入用户名" name="username">             <br><input id="unickname" type="text" placeholder="请输入昵称" name="nickname">         </div>         <div class="input_box">             <br><input id="upass" type="password" placeholder="请输入密码" name="password">             <br><input id="upass1" type="password" placeholder="请确认密码">     </div>             <br><div id="error_box"><br></div><br>         <div>             <br>             <br><button class="jj" onclick="fnRefist()">注册</button>         </div>         </form>     </div> {% endblock %}

　　

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

from flask import Flask,render_template,request,redirect,url_for,session from flask_sqlalchemy import SQLAlchemy import config from functools import wraps from datetime import datetime     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(50))     # db.create_all() # 增加 # user = User(username='mis1114',password = 'mis1114',nickname='mis1114') # db.session.add(user) # db.session.commit() # # 查询 # User.query.filter(User.username == 'mis1114').first() # #修改 # user =User.query.filter(User.username =='mis1114').first() # user.password='23456' # print(user.username,user.password) # db.session.commit() # # 删除 # user =User.query.filter(User.username =='mis1114').first() # db.session.delete(user) # db.session.commit()     @app.route('/') def index():     return render_template('index.html')   @app.route('/login/') def login():     return render_template('login.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')         nickname = request.form.get(' nickname')         user = User.query.filter(User.username==username).first()         if user:             return u'username existed'         else:             user = User(username=username, password= password, nickname=nickname)             db.session.add(user)             db.session.commit()             return redirect(url_for('login'))   @app.route('/question/') def question():     return render_template('question.html')   if __name__ == '__main__':     app.run(debug=True)