base-flask/app/validators/forms.py

from wtforms import StringField
from wtforms.validators import DataRequired, length, Email, Regexp
from wtforms import ValidationError

from app.models.user import User
from app.validators.base import BaseForm as Form

class ClientForm(Form):
    account = StringField(validators=[DataRequired(message='不允许为空'), length(
        min=5, max=32
    )])
    secret = StringField()

class UserEmailForm(ClientForm):
    account = StringField(validators=[
        Email(message='invalidate email')
    ])
    secret = StringField(validators=[
        DataRequired(),
        Regexp(r'^[A-Za-z0-9_*&$#@]{6,22}$')
    ])
    nickname = StringField(validators=[DataRequired(), length(min=2, max=22)])

    def validate_account(self, value):
        if User.query.filter_by(email=value.data).first():
            raise ValidationError()


class TokenForm(Form):
    token = StringField(validators=[DataRequired()])