项目GIthub源码地址：[https://github.com/vannesspeng/TornadoForum]
虚拟环境中安装wtforms,tornado_wtforms
pip install wtforms
pip install tornado_wtforms
本小节代码目录
代码结构
这里前端页面使用第六章中给出的message.html页面，[html、css代码]（https://www.jianshu.com/p/a052624e73d3），之前已经给出，大家可以去第六章中获取。
wtforms定义form表单并验证
models.py
from datetime import datetime
from peewee import *
from peewee import Model
db = MySQLDatabase('message', host="127.0.0.1", port=3306, user="root", password="root")
class Message(Model):
id = AutoField(verbose_name="id")
name = CharField(max_length=10, verbose_name="姓名")
email = CharField(max_length=30, verbose_name="邮箱")
address = CharField(max_length=30, verbose_name="地址")
message = TextField(verbose_name="留言")
class Meta:
database = db
table_name = "message"
if __name__ == "__main__":
db.create_tables([Message])
定义Message Model对应的Form对象
from wtforms.fields import StringField, TextAreaField
from wtforms_tornado import Form
from wtforms.validators import DataRequired, Length, Email
class MessageForm(Form):
name = StringField("姓名", validators=[DataRequired(message="请输入姓名"), Length(min=2,max=5, message="长度为2-5")])
email = StringField("邮箱", validators=[Email(message="邮箱不合法")])
address = StringField("地址", validators=[DataRequired(message="请填写地址")])
message = TextAreaField("留言", validators=[DataRequired(message="请填写留言")])
使用wtforms进行表单验证，再返回html
# 1. 什么是模板
import os
from tornado.web import StaticFileHandler, RedirectHandler
from aiomysql import create_pool
import time
from tornado import web
import tornado
from tornado.web import template
from chapter_05.forms import MessageForm
from chapter_05.models import Message
class MainHandler(web.RequestHandler):
def initialize(self, db):
self.db = db
async def get(self, *args, **kwargs):
message_from = MessageForm()
# 使用wtforms返回html
self.render("message.html", message_form=message_from)
async def post(self, *args, **kwargs):
message_from = MessageForm(self.request.arguments)
if message_from.validate():
#验证通过， 获取具体的值并保存
name = message_from.name.data
email = message_from.email.data
address = message_from.address.data
message_data = message_from.message.data
message = Message()
message.name = name
message.email = email
message.address = address
message.message = message_data
message.save()
self.render("message.html", message_form=message_from)
else:
self.render("message.html", message_form=message_from)
settings = {
"static_path": os.path.join(os.getcwd(), "static"),
"static_url_prefix": "/static/",
"template_path": "templates",
"db": {
"host": "127.0.0.1",
"user": "root",
"password": "root",
"name": "message",
"port": 3306
}
}
if __name__ == "__main__":
app = web.Application([
("/", MainHandler, {"db": settings["db"]}),
# ("/static/(.*)", StaticFileHandler, {"path": "C:/projects/tornado_overview/chapter03/static"})
], debug=True, **settings)
app.listen(8888)
tornado.ioloop.IOLoop.current().start()
由于wtform返回了form表单的html代码，那么message.html页面修改如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" type="text/css" href="{{ static_url('style.css') }}">
</head>
<body>
<form action="/" method="post" class="smart-green">
<h1>留言信息
<span>请留下你的信息.</span>
</h1>
<!--<input id="id" type="hidden" name="id" value="{{ id }}" />-->
{% autoescape None %}
{% for field in message_form %}
<span>{{ field.label.text }} :</span>
{{ field(placeholder="请输入"+field.label.text) }}
{% if field.errors %}
{% for error_msg in field.errors %}
<div class="error-msg">{{ error_msg }}</div>
{% end %}
{% else %}
<div class="error-msg"></div>
{% end %}
{% end %}
<label>
<span> </span>
<input type="submit" class="button" value="提交"/>
</label>
</form>
</body>
</html>
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