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

 

js代码

function myRegister() {
    var oUname = document.getElementById("uname");
    var oError = document.getElementById("error_box");
    var oUpass = document.getElementById("upass");
    var oConfirm = document.getElementById("uconfirmrpass")
    var oUtel = document.getElementById("utel");
    // var isError = true;
    oError.innerHTML = "<br>";
    // oError.innerHTML="<br>"
    if ((oUname.value.length < 6) || (oUname.value.length > 20)) {
        oError.innerHTML = "用户名6位必须6-20"
        return false;
        // return;
    }
    else if ((oUname.value.charCodeAt(0) >= 48) && (oUname.value.charCodeAt(0) <= 57)) {
        oError.innerHTML = "用户名首位必须为字母"
        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 = "用户名必须为字母或数字"
                return false;
            }
        }
    if (oUtel.value.length != 11) {
        oError.innerHTML = "电话号码必须为11位"
        return false;
    }
    else for (var i = 0; i < oUname.value.length; i++) {
        if (oUtel.value.charCodeAt(i) < 48 || oUtel.value.charCodeAt(i) > 57) {
            oError.innerHTML = "电话号码必须为数字"
            return false;
        }
    }
    if ((oUpass.value.length < 6) || (oUpass.value.length > 20)) {
        oError.innerHTML = "密码必须6-20位"
        return false;
    }
    else if (oConfirm.value != oUpass.value) {
        oError.innerHTML = "两次输入的密码不一致"
        return false;
    }
    return true;
    // window.alert("注册成功")

}

HTML代码

{% extends 'base.html' %}
{% block title %}注册界面{% endblock %}
{% block head %}
    <script type="text/javascript" src="{{ url_for('static',filename='js/login-register.js') }}"></script>
    <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='css/login-register.css') }}">
{% endblock %}
{% block main %}
    <form action="{{ url_for('register') }}" method="post">
    <div class="container">
        <div class="box">
            <a href="{{ url_for('login') }}" class="active">登录</a>
            <a>*</a>
            <a href="{{ url_for('register') }}">注册</a>
        </div>
        <br><br>
        <div class="input_box">
            Username:<input id="uname" type="text" placeholder="你的昵称" name="Username"><br><br>
            Telphone:<input id="utel" type="text" placeholder="手机号" name="Telphone"><br><br>
            Password:<input id="upass" type="password" placeholder="设置密码" name="Password"><br><br>
            Confirmpass:<input id="uconfirmrpass" type="password" placeholder="确认密码" name="Confirmpass"><br><br></div>
        <div id="error_box"></div>
        <div>
            <button id="register" type="submit" onclick=" return myRegister()">注册</button>
        </div>
    </div>
    </form>
{% endblock %}

python代码

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)
    Telphone=db.Column(db.String(20), nullable=True)
db.create_all()
@app.route('/')
def base():
    return render_template('base.html')


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


@app.route('/register/', methods=['GET', 'POST'])
def register():
    if request.method == 'GET':
        return render_template('register.html')
    else:
        usern = request.form.get('Username')
        passn=request.form.get('Password')
        teln=request.form.get('Telphone')
        user=User.query.filter(User.Username==usern).first()
        if user:
            return '用户名已经存在'
        else:
            user1=User(Username=usern,Password=passn,Telphone=teln)
            db.session.add(user1)
            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)