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
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 home():
    return render_template('shouye.html')

@app.route('/sign_in/',methods=['GET','POST'])
def sign_in():
    return render_template('denglu1.html')

@app.route('/sign_up/',methods=['GET','POST'])
def sign_up():
    if request.method == 'GET':
        return render_template('zhuce.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:
            user1 = User(username=username, password=password)
            db.session.add(user1)
            db.session.commit()
            return redirect(url_for('sign_in'))


@app.route('/question/')
def question():
    return render_template('question.html')

if __name__ == '__main__':
    app.run(debug=True)
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:@localhost:3306/zhuce?charset=utf8'
SQLALCHEMY_TRACK_MODIFICATIONS = False
function myLogin() {
    var oUname=document.getElementById("uname");
    var oPass1=document.getElementById("upass1");
    var oPass2=document.getElementById("upass2");
    var oError=document.getElementById("error_box");
    oError.innerHTML="<br>";
    //username
    if(oUname.value.length<6||oUname.value.length>20){
        oError.innerHTML="username must be 6-20.";
        return false;
    }else if((oUname.value.charCodeAt(0)>=48)&&(oUname.value.charCodeAt(0)<=57)){
        oError.innerHTML="firt name can't numbuter.";
        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 number and letter";
            return false;
            }
        }
    }

    //password
    if(oPass1.value.length<6||oPass2.value.length>20){
        oError.innerHTML="password must be 6-20.";
        return false;
    }else if(oPass1.value != oPass2.value){
        oError.innerHTML="The password input is inconsistent";
        return false;
    }
    return true;
    }
{% extends'base.html' %}
{% block title %}
    register
{% endblock %}
    {% block head %}
    <link rel="stylesheet" href="{{ url_for('static',filename='css/zhuce.css')}}">
     <script src="{{ url_for('static',filename='js/zhuce.js') }}"></script>
{% endblock %}
{% block main %}
<body>
<div class="login">
    <h1>Register</h1>
    <form class="form" method="post" action="{{ url_for('sign_up') }}">
        <h3>set username:</h3>
        <input id="uname" type="text" name="username" placeholder="Username" >
        <br>
        <h3>set password:</h3>
        <input id="upass1" type="password" name="password" placeholder="Password">
        <br>
        <h3>repeat password:</h3>
         <input id="upass2" type="password"  placeholder="Password again" >
        <br>
        <button class="button" onclick="return myLogin()">Register</button>

        <div id="error_box"><br></div>
    </form>
  </div>
</body>
{% endblock %}
</html>

 

posted @ 2017-11-21 16:29  078刘凯敏  阅读(197)  评论(0)  编辑  收藏  举报