Python Flask WTForms: How can I disable a field dynamically in a view?

问题

I've been able to implement this change to create Field which is disabled in WTForms. How would I selectively disable a field in my view before rendering it?

回答1:

vim forms.py:

add_time = DateTimeField(

    '添加时间',
    format='%Y-%m-%d %H:%M:%S',
    default=datetime.datetime.now(),
    # I use bs3，and it well add input an attribute disabled
    render_kw={'disabled':''},
    validators=[DataRequired()],
)

回答2:

If you're trying to remove a field you could look at the Removing Fields Per-instance in the documentation.

From the docs:

Sometimes, you create a form which has fields that aren’t useful in all circumstances or to all users. While it is indeed possible with form inheritance to define a form with exactly the fields you need, sometimes it is necessary to just tweak an existing form. Luckily, forms can have fields removed post-instantiation by using the del keyword:

class MagazineIssueForm(Form):
    title  = TextField()
    year   = IntegerField('Year')
    month  = SelectField(choices=MONTHS)

def edit_issue():
    publication = get_something_from_db()
    form = MagazineIssueForm(...)

    if publication.frequency == 'annual':
        del form.month`

回答3:

It's almost as @Bibhas proposed. If I understand this correctly and you want to disable a field through the html disabled attribute, then the following worked for me:

form.field(disabled=True)

This answer might be a bit late, but if any one else has this problem it might help.

来源：https://stackoverflow.com/questions/16424374/python-flask-wtforms-how-can-i-disable-a-field-dynamically-in-a-view