TypeError:validate_on_submit()缺少1个必需的位置参数:"self" [英] TypeError: validate_on_submit() missing 1 required positional argument: 'self'

问题描述

我正在使用 Flask网站开发教程，但我已经遇到了一些错误;我简单的Web应用程序正在使用FlaskForm并试图验证信息，但是特别是在函数validate_on_submit()上遇到了一些麻烦.这是我的python代码

Am using Flask web development tutorial and I have and am running to several errors; my simple web app is utilizing FlaskForm and am trying to validate the information, but am running into some trouble especially at the function validate_on_submit(). Here is my python code

 class NameForm(FlaskForm):
   name = StringField("What is your name?", validators=[required])
   submit = SubmitField('Submit')



 @app.route('/index', methods=['GET', 'POST'])
 def index():
     name = None
     formi = NameForm()


     if FlaskForm.validate_on_submit():
        name = FlaskForm.name.data
        FlaskForm.name.data = ''
        return render_template('index.html', form=formi, name=name)

我的错误发生在if语句

my error occurs at the if statement

推荐答案

您需要从表单实例而不是针对类调用 validate_on_submit .使用:

You need to call validate_on_submit from your form instance and not for the class. Use:

 if formi.validate_on_submit():

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