Flask wtforms實(shí)現(xiàn)表單驗(yàn)證使用
發(fā)布日期：2022-02-12 15:43 | 文章來(lái)源：腳本之家
wtforms
安裝:pip3 install wtforms
使用1(簡(jiǎn)單版)：
from flask import Flask, render_template, request, redirect
from wtforms import Form
from wtforms.fields import simple
from wtforms import validators
from wtforms import widgets
app = Flask(__name__, template_folder='templates')
app.debug = True
class LoginForm(Form):
# 字段（內(nèi)部包含正則表達(dá)式）
name = simple.StringField(
label='用戶名',
validators=[
validators.DataRequired(message='用戶名不能為空.'),
validators.Length(min=6, max=18, message='用戶名長(zhǎng)度必須大于%(min)d且小于%(max)d')
],
widget=widgets.TextInput(), # 頁(yè)面上顯示的插件
render_kw={'class': 'form-control'}
)
# 字段（內(nèi)部包含正則表達(dá)式）
pwd = simple.PasswordField(
label='密碼',
validators=[
validators.DataRequired(message='密碼不能為空.'),
validators.Length(min=8, message='用戶名長(zhǎng)度必須大于%(min)d'),
validators.Regexp(regex="^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&])[A-Za-z\d$@$!%*?&]{8,}",
message='密碼至少8個(gè)字符，至少1個(gè)大寫(xiě)字母，1個(gè)小寫(xiě)字母，1個(gè)數(shù)字和1個(gè)特殊字符')
],
widget=widgets.PasswordInput(),
render_kw={'class': 'form-control'}
)
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'GET':
form = LoginForm()
return render_template('login.html', form=form)
else:
form = LoginForm(formdata=request.form)
if form.validate():
print('用戶提交數(shù)據(jù)通過(guò)格式驗(yàn)證，提交的值為：', form.data)
else:
print(form.errors)
return render_template('login.html', form=form)
if __name__ == '__main__':
app.run()
login.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>登錄</h1>
<form method="post">
<p>{{form.name.label}} {{form.name}} {{form.name.errors[0] }}</p>
<p>{{form.pwd.label}} {{form.pwd}} {{form.pwd.errors[0] }}</p>
<input type="submit" value="提交">
</form>
</body>
</html>
使用2(復(fù)雜版)：
from flask import Flask, render_template, request, redirect
from wtforms import Form
from wtforms.fields import core
from wtforms.fields import html5
from wtforms.fields import simple
from wtforms import validators
from wtforms import widgets
app = Flask(__name__, template_folder='templates')
app.debug = True
class RegisterForm(Form):
name = simple.StringField(
label='用戶名',
validators=[
validators.DataRequired()
],
widget=widgets.TextInput(),
render_kw={'class': 'form-control'},
default='alex'
)
pwd = simple.PasswordField(
label='密碼',
validators=[
validators.DataRequired(message='密碼不能為空.')
],
widget=widgets.PasswordInput(),
render_kw={'class': 'form-control'}
)
pwd_confirm = simple.PasswordField(
label='重復(fù)密碼',
validators=[
validators.DataRequired(message='重復(fù)密碼不能為空.'),
validators.EqualTo('pwd', message="兩次密碼輸入不一致") # EqualTo也可以做密碼驗(yàn)證
],
widget=widgets.PasswordInput(),
render_kw={'class': 'form-control'}
)
email = html5.EmailField(
label='郵箱',
validators=[
validators.DataRequired(message='郵箱不能為空.'),
validators.Email(message='郵箱格式錯(cuò)誤')
],
widget=widgets.TextInput(input_type='email'),
render_kw={'class': 'form-control'}
)
gender = core.RadioField(
label='性別',
choices=(
(1, '男'),
(2, '女'),
),
coerce=int # “1” “2”
)
city = core.SelectField(
label='城市',
choices=(
('bj', '北京'),
('sh', '上海'),
)
)
hobby = core.SelectMultipleField(
label='愛(ài)好',
choices=(
(1, '籃球'),
(2, '足球'),
),
coerce=int
)
favor = core.SelectMultipleField(
label='喜好',
choices=(
(1, '籃球'),
(2, '足球'),
),
widget=widgets.ListWidget(prefix_label=False),
option_widget=widgets.CheckboxInput(),
coerce=int,
default=[1, 2]
)
def __init__(self, *args, **kwargs):
super(RegisterForm, self).__init__(*args, **kwargs)
self.favor.choices = ((1, '籃球'), (2, '足球'), (3, '羽毛球'))
def validate_pwd_confirm(self, field):
"""
自定義pwd_confirm字段規(guī)則，例：與pwd字段是否一致
:param field:
:return:
"""
# 最開(kāi)始初始化時(shí)，self.data中已經(jīng)有所有的值
if field.data != self.data['pwd']:
# raise validators.ValidationError("密碼不一致") # 繼續(xù)后續(xù)驗(yàn)證
raise validators.StopValidation("密碼不一致") # 不再繼續(xù)后續(xù)驗(yàn)證
@app.route('/register', methods=['GET', 'POST'])
def register():
if request.method == 'GET':
form = RegisterForm(data={'gender': 2,'hobby':[1,]}) # initial
return render_template('register.html', form=form)
else:
form = RegisterForm(formdata=request.form)
if form.validate():
print('用戶提交數(shù)據(jù)通過(guò)格式驗(yàn)證，提交的值為：', form.data)
else:
print(form.errors)
return render_template('register.html', form=form)
if __name__ == '__main__':
app.run()
register.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>用戶注冊(cè)</h1>
<form method="post" novalidate style="padding:0 50px">
{% for field in form %}
<p>{{field.label}}: {{field}} {{field.errors[0] }}</p>
{% endfor %}
<input type="submit" value="提交">
</form>
</body>
</html>
到此這篇關(guān)于Flask wtforms實(shí)現(xiàn)表單驗(yàn)證使用的文章就介紹到這了,更多相關(guān)Flask wtforms表單驗(yàn)證內(nèi)容請(qǐng)搜索本站以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持本站！
版權(quán)聲明：本站文章來(lái)源標(biāo)注為YINGSOO的內(nèi)容版權(quán)均為本站所有，歡迎引用、轉(zhuǎn)載，請(qǐng)保持原文完整并注明來(lái)源及原文鏈接。禁止復(fù)制或仿造本網(wǎng)站，禁止在非www.sddonglingsh.com所屬的服務(wù)器上建立鏡像，否則將依法追究法律責(zé)任。本站部分內(nèi)容來(lái)源于網(wǎng)友推薦、互聯(lián)網(wǎng)收集整理而來(lái)，僅供學(xué)習(xí)參考，不代表本站立場(chǎng)，如有內(nèi)容涉嫌侵權(quán)，請(qǐng)聯(lián)系alex-e#qq.com處理。
相關(guān)文章
關(guān)注官方微信