Flask

Question

我正在我的网站上开发一个通知系统。我决定在数据库中为他们制作一个模型。我还在 views.py 中创建了一个函数，该函数接受接收通知的用户和通知类型的参数。这是代码：

@views.route('/send_notification',methods = ['GET','POST'])
@login_required
def send_notification(user, type):

    reciever = User.query.filter_by(username = user).first()

    if type == 'family-invitation':
        family = Family.query.filter_by(id = current_user.family_id).first()
        description = "invites you to their family!"
        new_notification = Notification(sender = current_user.username, sender_prof_img = family.prof_img, user_id = reciever.id, description = description)
        db.session.add(new_notification)
        db.session.commit()
        flash("Invitation to family has been sent!", category="success")

    return True

现在我希望能够在有人邀请时向用户发送通知。我正在考虑在有人按下按钮时调用 python 函数，但我不知道如何编写代码。

我想到了类似的方法，但它不起作用：

<button
      onclick="window.location.href = '{{ url_for('views.send_notification(profileUser.username, 'family-invitation')') }}';"
    >
      Invite to family
    </button>

Answer 1

Flask Jinja 模板中的

url_for() 不是那样工作的。它形成一个 URL 到特定资源，这意味着您不能将 Python 代码作为参数传递。我首先想到的选项是使用 URL 参数将数据传递给路由函数。

@views.route('/send_notification/<user>/<type>',methods = ['GET','POST'])
@login_required
def send_notification(user, type):

    reciever = User.query.filter_by(username = user).first()

    if type == 'family-invitation':
        family = Family.query.filter_by(id = current_user.family_id).first()
        description = "invites you to their family!"
        new_notification = Notification(sender = current_user.username,                     
    sender_prof_img = family.prof_img, user_id = reciever.id, description = description)
    db.session.add(new_notification)
    db.session.commit()
    flash("Invitation to family has been sent!", category="success")

return True

这样你的 HTML 就会像这样：

<button
  onclick="btnOnClick(profileUser.username, 'family-invitation');"
    >
  Invite to family
</button>
<script>
    function btnOnClick(username, notificationType) {
    window.location = `/send_notification/${username}/${notificationType}`;
}
</script>

Answer 2

js文件

function myfunction(){
   fetch("/send_notification", {
      method:"GET"
})

}

html

<button onclick="myfunction()">click me to send notification</button>

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