Flask 三方组件 WTForms

from flask import Blueprint
from flask import request
from flask import render_template
from wtforms.fields import simple, core
from wtforms import Form, validators

reg = Blueprint("reg", __name__)


class RegForm(Form):
    username = simple.StringField(
        label="用户名:",
        id="username",
        render_kw={"class": " form-control col-sm-2 "},
        validators=[
            validators.DataRequired(message="用户名不能为空"),
            validators.Length(min=2, max=7, message="用户名不能小于%(min)d,不能大于%(max)d")

        ]
    )
    password = simple.PasswordField(
        label="密码:",
        id="password",
        render_kw={"class": " form-control col-sm-2 "},
        validators=[
            validators.DataRequired(message="密码不能为空"),
            validators.Length(min=6, max=16, message="用户名不能小于%(min)d,不能大于%(max)d")

        ]
    )
    repassword = simple.PasswordField(
        label="确认密码",
        render_kw={"class": " form-control col-sm-2 "},
        validators=[
            validators.EqualTo("password", message="密码不一致")
        ]

    )

    email = simple.StringField(
        label="邮箱",
        render_kw={"class": " form-control col-sm-2 "},
        validators=[
            validators.Email(message="邮箱格式不符")
        ]
    )

    gender = core.RadioField(
        label="性别",
        choices=[
            (1, "男"),
            (2, "女")

        ],
        coerce=int

    )

    hobby = core.SelectMultipleField(
        label="爱好",
        choices=[
            (1, "抽烟"),
            (2, "喝酒"),
            (3, "烫头"),
        ],
        coerce=int
    )

    sub = simple.SubmitField(
        label="注册",

    )


@reg.route("/reg", methods=["GET", "POST"])
def reg_func():
    if request.method == "GET":
        reg = RegForm()
        return render_template("reg.html", reg=reg)
    else:
        new_reg = RegForm(formdata=request.form)
        if new_reg.validate():
            return "注册成功"
        else:
            return render_template("reg.html", reg=new_reg)