フラスコメールエラー：はAttributeError：「NoneType」オブジェクトが属性を持っていない「分割」ここ

Question

は、エラーのトレースバックです：

Traceback (most recent call last): 
    File "C:\PYTHON27\lib\site-packages\flask\app.py", line 2000, in __call__ 
    return self.wsgi_app(environ, start_response) 
    File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1991, in wsgi_app 
    response = self.make_response(self.handle_exception(e)) 
    File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1567, in handle_exception 
    reraise(exc_type, exc_value, tb) 
    File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1988, in wsgi_app 
    response = self.full_dispatch_request() 
    File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1641, in full_dispatch_request 
    rv = self.handle_user_exception(e) 
    File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1544, in handle_user_exception 
    reraise(exc_type, exc_value, tb) 
    File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1639, in full_dispatch_request 
    rv = self.dispatch_request() 
    File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1625, in dispatch_request 
    return self.view_functions[rule.endpoint](**req.view_args) 
    File "C:\Users\richard.danvers\Application\app\views.py", line 62, in index 
    department_data=form.department.data 
    File "C:\Users\richard.danvers\Application\app\views.py", line 30, in send_email 
    mail.send(msg) 
    File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 492, in send 
    message.send(connection) 
    File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 427, in send 
    connection.send(self) 
    File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 190, in send 
    message.as_bytes() if PY3 else message.as_string(), 
    File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 381, in as_string 
    return self._message().as_string() 
    File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 349, in _message 
    f = MIMEBase(*attachment.content_type.split('/')) 
AttributeError: 'NoneType' object has no attribute 'split' 

この問題でファイルを添付することになっている私の電子メール機能によるものな原因それは私のwtformにアップロードされています。私は誤って添付ファイルを参照している可能性があります。関数は次のとおりです。

def send_email(subject, sender, recipients, text_body): 
    FILE_TYPES = set(['txt', 'doc', 'docx', 'odt', 'pdf', 'rtf', 'text', 'wks', 'wps', 'wpd']) # list of accepted file types for file uploads 
    form = ApplicationForm (request.files) #request submitted files from the Application Form 
    submit_name = form.file_upload.data.filename #declares a variable for the submitted file name 
    mail = Mail(app) 
    msg = Message(subject, sender=sender, recipients=recipients) 
    msg.body = text_body 
    if '.' in submit_name and submit_name.rsplit('.', 1)[1] in FILE_TYPES: #if file is in list of approved file types 
     filename = secure_filename(submit_name) #hashes the filename for added security 
     form.file_upload.data.save('uploads/' + filename) #saves file to uploads folder 
     with app.open_resource('uploads/' + filename) as fp: 
      msg.attach(filename, data=fp.read()) #attaches the submitted file to the email 
      print 'file sent successfully' 
    mail.send(msg) 

誰も問題を見ることができますか？

Answer 1

私はコンテンツタイプを宣言しておらず、間違って参照していました。変更

：

msg.attach(filename, data=fp.read()) 

へ：

msg.attach(filename, 'text/plain', fp.read())