Flask框架学习笔记之使用Flask实现表单开发详解

2019-11-25 12:01:13

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本文实例讲述了使用Flask实现表单开发。分享给大家供大家参考，具体如下：

<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <title>Title</title></head><body>  <div align="center">  <h1>User Management</h1>  <form method="post">    <input type="text" name="username" placeholder="username" />    <br>    <input type="password" name="password" placeholder="password" />    <br>    <input type="submit" value="Submit">    <input type="reset" value="Reset">  </form>  </div></body></html>

使用html实现的表单：

用flask实现相同功能的表单：

# -*- coding:utf-8 -*-from flask import Flask, request, render_template, redirectfrom wtforms import Form, TextField, PasswordField, validatorsapp = Flask(__name__)class LoginForm(Form):  # validators指定一个由验证函数组成的列表  # 在接受用户提交的数据之前验证数据  # 验证函数Required()确保提交的字段不为空  username = TextField("username", [validators.Required()])  password = PasswordField("password", [validators.Required()])# 定义user路由@app.route("/user", methods=['GET', 'POST'])def login():  myForm = LoginForm(request.form)  if request.method == 'POST':    # username = request.form['username']使用request获取数据    # password = request.form['password']    # 也可以使用类实例里的表单方法来获取相应的数据    # validate来验证输入的表单数据是否有效    if myForm.username.data == "loli" and myForm.password.data == "520" and myForm.validate():      return redirect("http://www.baidu.com")    else:      message = "Login Failed"      return render_template("form1.html", message=message, form=myForm)  return render_template("form1.html", form=myForm)if __name__ == '__main__':  app.run()

form1模板：

<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <title>Title</title></head><body>  <div align="center">  <h1>User Management</h1>  <form method="post">    {% if message %}      {{ message }}    {% endif %}    <br>    {{ form.username }}    <br>    {{ form.password }}    <br>    <input type="submit" value="Submit">    <input type="reset" value="Reset">  </form>  </div></body></html>