python之用 Django 信号通知用户 _ Django

假设我们有一个模型MarkPost。此模型与 Post 模型具有 ForeinKey 关系。

class Post(models.Model): 
    TITLE = ( 
             ('1', 'USA'), 
             ('2', 'Europe'), ) 
    title =  models.CharField(max_length=1, choices=TITLE) 
 
class MarkPost(models.Model): 
    user = models.ForeignKey(User, on_delete=models.CASCADE) 
    post = models.ForeignKey(Post, on_delete=models.CASCADE,  
                                             related_name="marked") 

例子:

foo_post = Post.objects.create(title="1") 
marked_post1 = MarkPost.objects.create(user="Foo", post=foo_post) 

我正在尝试编写一些信号通知，如果另一个 Post 实例的值是 ma​​rked_post1.post.title ，则通知 ma​​rked_post1 中的相关用户。我做了一个为此目的的信号函数。

信号.py

def created_post(sender, instance, created, **kwargs): 
    marked = MarkPost.objects.get(pk=1) 
    marked_title = marked.post.title 
    if created and instance.title == marked_title : 
        #logic of my code 
        print(" new post made ") 
 
post_save.connect(created_post, sender=Post) 

这将适用于一个实例，但如何以通用方式为标记帖子的每个用户执行此操作？

请您参考如下方法:

假设您在 MarkPost 的 id 计算背后有一个定义的逻辑，

def logic_to_find_markpost_id(req_data): 
    # do stuff to find MarkPost's id 
    return markpost_id 
 
 
def created_post(sender, instance, created, **kwargs): 
    markpost_id = logic_to_find_markpost_id(req_data) 
    marked = MarkPost.objects.get(pk=markpost_id) 
    marked_title = marked.post.title 
    if created and instance.title == marked_title: 
        # logic of your code 
        print(" new post made ") 
 
 
post_save.connect(created_post, sender=Post)