Flask-WTF的使用

安装:

        pip install Flask-WTF

一. 在 forms.py中 

# forms.py

from flask_wtf.file import (
    FileRequired,  # 文件验证
    MultipleFileField,  # 多文件字段
    FileAllowed, FileField, FileSize,  # 文件字段 文件验证
    FileStorage
)
from wtforms.fields import simple  # 导入字段
from wtforms import validators  # 导入验证器
from wtforms import widgets  # 导入组件
from wtforms.form import Form
from flask_wtf.form import FlaskForm, Form  # 导入form

""" 验证码 """
from flask_wtf import Form, RecaptchaField

""" URL """
from wtforms.fields import URLField
from wtforms.validators import url

""" 文件 """
from flask_wtf import file  # 文件
from flask_wtf import recaptcha  # 验证码
from flask_wtf.file import (FileRequired,  # 文件字段
                            MultipleFileField  # 多文件字段
                            )


class LoginForm(FlaskForm):
    username = simple.StringField("用户名", validators=[validators.Length(min=4, max=6, message="长度只能是4~6位"),
                                                        validators.DataRequired(),
                                                        validators.Regexp(r'\d+', message="只能是数字")],
                                  widget=widgets.TextInput())
    password = simple.PasswordField("密码", validators=[validators.Length(min=6, message="长度不能少于6位"),
                                                        validators.DataRequired()],
                                    widget=widgets.PasswordInput())
    confirm = simple.PasswordField('确认密码', validators=[validators.Length(min=6, message="长度不能少于6位"),
                                                           validators.DataRequired(),
                                                           validators.EqualTo("password",
                                                                              message="密码不一致")],
                                   widget=widgets.PasswordInput())
    submit = simple.SubmitField("登录")


class UserForm(FlaskForm, Form):
    username = simple.StringField('用户名',
                                  [validators.Length(min=4, max=25, message="长度最小不能少于4最大不能大于25"),
                                   validators.DataRequired(message="不能为空"),
                                   validators.Regexp(r'[A-Za-z0-9_\-\u4e00-\u9fa5]+')
                                   ], widget=widgets.TextInput(),
                                  render_kw={"class": "username"})

    email = simple.StringField('邮箱', [
        validators.Length(min=6, max=35)
    ], widget=widgets.EmailInput())

    password = simple.PasswordField('密码', [validators.Length(min=6, message="长度不能少于6位"),
                                             validators.DataRequired(message="不可为空"), ],
                                    widget=widgets.PasswordInput())
    confirm = simple.PasswordField('确认密码', [validators.Length(min=6, message="长度不能少于6位"),
                                                validators.DataRequired(message="不可为空"),
                                                validators.EqualTo('password', message='密码不一致')],
                                   widget=widgets.PasswordInput())
    accept_tos = simple.BooleanField('接受协议', [validators.DataRequired()], widget=widgets.CheckboxInput())
    submit = simple.SubmitField("登录", widget=widgets.SubmitInput())


class UploadForm(FlaskForm):
    file = simple.FileField("文件", validators=[file.FileRequired(), file.FileAllowed("jpg, png, gif",
                                                                                      message="只允许上传jpg, png, gif的图片格式")])
    multiple = simple.MultipleFileField("多文件")
    submit = simple.SubmitField("提交")


class LinkForm(Form):
    url = URLField(validators=[url()])


class SignupForm(Form):
    username = simple.StringField('Username')
    recaptcha = RecaptchaField()

1.  导包

2. 登录 form 

3.  字段验证

4. 用户form

5. 文件form

6.  URL form

 7. 验证码form

#  待完成

二. 后端部分

# 导入 form

# 路由  渲染到前端

三. 前端部分

<!--  遍历form -->