python - 运行时错误 : Working outside of application context. Flask - 邮件

Question

from flask import current_app as app
from flask import render_template
from threading import Thread
from flask_mail import Message



def send_async_email(app, msg):
    with app.app_context():
        mail.send(msg)

def send_email(to, subject, template, **kwargs):
    msg = Message(app.config['MAIL_SUBJECT_PREFIX'] + subject,
                  sender=app.config['MAIL_SENDER'], recipients=[to])
    # msg.body = render_template(template + '.txt', **kwargs)
    msg.html = render_template(template + '.html', **kwargs)
    thr = Thread(target=send_async_email, args=(app,msg))
    thr.start()
    return thr
    #mail.send(msg)

运行时错误:在应用程序上下文之外工作。

这通常意味着您尝试使用所需的功能以某种方式与当前应用程序对象交互。解决为此，使用 app.app_context() 设置应用程序上下文。请参阅文档以获取更多信息。

我以为我已经创建了app_context，但代码仍然显示运行时错误。请帮忙，谢谢。

Answer 1

您可以使用如下方式调用 async_send_mail 函数:

   app = current_app._get_current_object()
   thr = Thread(target=async_send_mail, args=[app, msg])
   thr.start()

然后异步函数将如下所示:

def async_send_mail(app, msg):
   with app.app_context():
      mail.send(msg)