AttributeError：'EditForm'对象没有属性'validate_on_submit' [英] AttributeError: 'EditForm' object has no attribute 'validate_on_submit'

问题描述

我有一个小的编辑应用程序与下面的文件。当我提交表单时，它显示我 AttributeError：'EditForm'对象没有任何属性'validate_on_submit'任何人都可以告诉我是什么问题？

<来自flask.ext.wtf的form.py

 从wtforms中导入表格
 import Form，TextField，BooleanField，PasswordField，TextAreaField，验证器$ b $ from wtforms.validators import必需
 $ b $ class EditForm（Form）：
编辑用户配置文件EditForm 
 username = TextField（'username'，[validators.Length（min = 3，max = 50），validators.Required（）]）
 email = TextField（'email'，[validators.Length电子邮件，validators.Required（）]）
密码= PasswordField（'密码'，[validators.Required（）]）
年龄= TextField（'年龄'，[validators.Length（min = 1，max = 3），validators.Required（）]）
 about_user = TextAreaField（'about_user'，[validators.Length（max = 500）]）
 img_url = TextField （'img_url'）
  

views.py

pre $ from flask import render_template，url_for，flash，g，redirect，session，request $ b $ from flask.ext.login import login_user，logout_user，current_user ，login_required
从表单导入LoginForm，RegisterForm，EditForm

@ app.route（'/ edit'，methods = ['GET'，'POST']）
def edit （）：
form = EditForm（request.form）
$ b $ if request.method =='POST'and form.validate_on_submit（）：
g.user.username = form .data.username
g.user.email = form.data.email
g.user.age = form.data.age
g.user.img_url = form.data.img_url
g.user.about_user = form.data.about_user
db.session.add（g.user）
db.session.commit（）
flash（'Your changes saved successfully '）
return redirect（url_for（'edit'））
else：
form.data.username = g.use r.username
form.data.email = g.user.email
form.data.age = g.user.age
form.data.img_url = g.user.img_url
form.data.about_user = g.user.about_user
return render_template（'edit.html'，
title ='Edit Profile'，
form = form）


edit.html

  {％extendsbase.html％} 
 {％block content％} 
< div> 
< form action =method =postname =edit> 
< table> 
< tr> 
< td>使用者名称< / td> 
< td> {{form.username}}< / td> 
< / tr> 
< tr> 
< td>电子邮件< / td> 
< td> {{form.email}}< / td> 
< / tr> 
< tr> 
< td>年龄< / td> 
< td> {{form.age}}< / td> 
< / tr> 
< tr> 
< td>选择头像< / td> 
< td> {{form.img_url}}< / td> 
< / tr> 
< tr> 
< td>关于我< / td> 
< td> {{form.about_user（cols = 50，rows = 5）}}< / td> 
< / tr> 
< tr> 
< td>< / td> 
< td>< input type =submitname =submitvalue =Save changes/>< / td> < / TR> 
< / table> 
< / form> 
< / div> 
 {％endblock％} 
  

解决方案

错误的 Form 对象：



  from flask.ext.wtf import Form从wtforms 
导入Form，TextField，BooleanField，PasswordField，TextAreaField，验证器
  

第二个导入从 wtforms 从 flask_wtf 替换导入 Form 。从第二个导入行中删除 Form ，并将您的 flask.ext.wtf 导入更新为 flask_wtf 保持未来 - ）

$ $ $ $ $ $ $ $ $ $ $ $ $'$ $ $ $ $ $'验证器


另外两个注释：



1. 表单将从请求中获取值，不需要传入 request.form 。




2. validate_on_submit（）也可以测试请求方法，您自己也不需要这样做。

$ b

以下就足够了：



  @app。如果form.validate_on_submit（）函数返回true，则返回true，否则返回false。 ）：
  




I have a small edit app with the files bellow. When I submit tbe form it shows me AttributeError: 'EditForm' object has no attribute 'validate_on_submit' Can anyone please tell me what is the issue?

forms.py

from flask.ext.wtf import Form
from wtforms import Form, TextField, BooleanField, PasswordField, TextAreaField, validators
from wtforms.validators import Required

class EditForm(Form):
    """edit user Profile EditForm"""
    username = TextField('username', [validators.Length(min=3, max=50), validators.Required()])
    email = TextField('email', [validators.Length(min=5, max=100), validators.Email, validators.Required()])
    password = PasswordField('password', [validators.Required()])
    age = TextField('age', [validators.Length(min=1, max=3), validators.Required()])
    about_user = TextAreaField('about_user', [validators.Length(max=500)])
    img_url = TextField('img_url')

views.py

from flask import render_template, url_for, flash, g, redirect, session, request
from flask.ext.login import login_user, logout_user, current_user, login_required
from forms import LoginForm, RegisterForm, EditForm

@app.route('/edit', methods = ['GET', 'POST'])
def edit():
    form = EditForm(request.form)

    if request.method == 'POST' and form.validate_on_submit():
        g.user.username = form.data.username
        g.user.email = form.data.email
        g.user.age = form.data.age
        g.user.img_url = form.data.img_url
        g.user.about_user = form.data.about_user
        db.session.add(g.user)
        db.session.commit()
        flash('Your changes saved successfully')
        return redirect(url_for('edit')) 
    else:
        form.data.username = g.user.username
        form.data.email = g.user.email
        form.data.age = g.user.age
        form.data.img_url = g.user.img_url
        form.data.about_user = g.user.about_user
    return render_template('edit.html',
        title = 'Edit Profile',
        form = form)

edit.html

{% extends "base.html" %}
{% block content %}
    <div>
    <form action="" method="post" name="edit">
        <table>
            <tr>
                <td>Username</td>
                <td>{{ form.username }}</td>
            </tr>
            <tr>
                <td>E-mail</td>
                <td>{{ form.email }}</td>
            </tr> 
            <tr>
                <td>Age</td>
                <td>{{ form.age }}</td>
            </tr>
            <tr>
                <td>Choose Avatar</td>
                <td>{{ form.img_url }}</td>
            </tr>
            <tr>
                <td>About me</td>
                <td>{{ form.about_user(cols = 50, rows = 5) }}</td>
            </tr>
            <tr>
                <td></td>
                <td><input type="submit" name="submit" value="Save changes"/></td>              </tr>
            </table>
        </form>
    </div>
{% endblock %}

解决方案

You imported the wrong Form object:

from flask.ext.wtf import Form
from wtforms import Form, TextField, BooleanField, PasswordField, TextAreaField, validators

The second import line imports Form from wtforms, replacing the import from flask_wtf. Remove Form from the second import line (and update your flask.ext.wtf import to flask_wtf to remain future-proof):

from flask_wtf import Form
from wtforms import TextField, BooleanField, PasswordField, TextAreaField, validators

Two additional notes:

1. The form will take values from the request for you, no need to pass in request.form.

2. validate_on_submit() tests for the request method too, no need to do so yourself.

The following then is enough:

@app.route('/edit', methods = ['GET', 'POST'])
def edit():
    form = EditForm()

    if form.validate_on_submit():

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