Flask-WTForms:如何检查是否需要字段? [英] Flask-WTForms: how to check if a field is required?
问题描述
class LoginForm(Form):
login = EmailField (必填),长度(最小= 5,最大= 2048),validators.Email()])
密码= PasswordField(u'Password',[必填项() = 6,max = 50)])
next = HiddenField()
remember = BooleanField('Remember me')
submit = SubmitField('Login')
$ b然后我在Jinja2中编写了一个通用的宏来渲染表单字段,我想这样做:{%if field.is_required()%}
{{field.label(class _ ='required')}}
{%else%}
{{field.label()}}
{%endif%}
所以...有办法看看是否需要一个字段?验证器可以 你可以检查:
field.label(class _ ='required'){%endif%}
<$ p $
I defined a form in the following way: Then I'm writing a generic macro in Jinja2 to render the form fields and I would like to do something like: So... is there a way to see if a field is required? Validators can set flags which you can check for:
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class LoginForm(Form):
login = EmailField(u'Email address', [required(), length(min=5, max=2048), validators.Email()])
password = PasswordField(u'Password', [required(), length(min=6, max=50)])
next = HiddenField()
remember = BooleanField('Remember me')
submit = SubmitField('Login')
{% if field.is_required() %}
{{ field.label(class_='required') }}
{% else %}
{{ field.label() }}
{% endif %}
{% if field.flags.required %}field.label(class_='required'){% endif %}