表單驗證的復雜用法
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):
def validate_pwd_confirm (self, field):
"""
自定義pwd_confirm字段規則，例：與pwd字段是否一致
:param field:
:return:
"""
# 最開始初始化時，self.data中已經有所有的值
if field.data != self.data['pwd']:
raise validators.ValidationError("密碼不一致") # 繼續后續驗證
#raise validators.StopValidation("密碼不一致123123123") # 不再繼續后續驗證
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='重復密碼',
validators=[
#validators.DataRequired(message='重復密碼不能為空.'),
validate_pwd_confirm,
validators.EqualTo('pwd', message="兩次密碼輸入不一致")
],
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='郵箱格式錯誤')
],
widget=widgets.TextInput(input_type='email'),
render_kw={'class': 'form-control'}
)
# 單選
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'),
)
)
# 下拉多選
hobby = core.SelectMultipleField(
label='愛好',
choices=(
(1, '籃球'),
(2, '足球'),
),
coerce=int # 若choices是數字則必填，若choices是字符串則可以不用填
)
# 打鈎的形式多選
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'))
@app.route('/register', methods=['GET', 'POST'])
def register():
if request.method == 'GET':
form = RegisterForm() # initial
return render_template('register.html', form=form)
else:
form = RegisterForm(formdata=request.form)
if form.validate():
print('用戶提交數據通過格式驗證，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</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>
