使用Flask的FileField验证无法正常工作 [英] FileField Validation using Flask not working properly

问题描述

我正在使用Flask-WTF验证表单，但是对于FileField，它验证不正确，它无法检测到文件.

I'm using Flask-WTF to validate my form, but for the FileField, it's not validating properly, it doesn't detect the file.

form.py

class addVendorForm(Form):
    name = StringField('Vendor Name',
                       validators=[Required()],
                       description='Eg. Alcatel Lucent'
                       )
    remarks = TextAreaField('Remarks', widget=TextArea())
    profile = StringField('Profile', widget=TextArea())
    file = FileField('Logo',validators=[
           FileRequired()])
    short_hand = StringField(validators=[
       Required()])
    notified = BooleanField()

views.py

@application.route('/memo', methods=['GET','POST'])
@application.route('/memo/<int:record_id>', methods=['GET','POST'])
@login_required
def add_memo(record_id=None):
    if record_id is None:
        record = Vendor()
        form = addVendorForm(request.form)
    else:
        record = Memo.query.filter_by(id=record_id).first_or_404()
        form = addMemoForm(obj=record)

    if request.method == 'POST' and form.validate():
        form.populate_obj(record)
        db.session.add(record)
        upload()
        db.session.commit()

        flash('<strong>Success!</strong> Database Updated.')
        return redirect(url_for('add_memo'))

    return render_template('add-form.html', form=form)

似乎表单对象没有保存文件.

And it seems that form object doesn't hold the file.

    >>> pp(form.file.__dict__)
    'data': u'',
    'default': None,
    'description': u'',
    'errors': [],
    'filters': (),
    'flags': <wtforms.fields.Flags: {}>,
    'id': 'file',
    'label': Label('file', 'Logo'),
    'meta': <wtforms.form.Meta object at 0x7f9ac40e80d0>,
    'name': 'file',
    'object_data': None,
    'process_errors': [],
    'raw_data': [],
    'short_name': 'file',
    'type': 'FileField',

但这在请求中.

>>> pp(request.files)
ImmutableMultiDict([('file', <FileStorage: u'cleaned data.xlsx' ('application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')>)])   

我还可以采用哪些其他验证方法?我只需要实现FileRequired.

What other validation approach can I implement? I just need to implement FileRequired.

推荐答案

更改

form = addVendorForm(request.form)

收件人

form = addVendorForm()

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