制作“已观看”视频的最佳方法用户组内邮件的属性？ [英] Best way to make "viewed" attribute for messages inside user group?

问题描述

我正在决定如何跟踪用户是否在时间轴中看到了帖子。

I am deciding on how to track if a user has seen a post in the timeline or not.

有 Post 和 Comment 模型。

class Comment(models.Model):
    author = models.ForeignKey('UserProfile')
    title = models.CharField(max_length=255)
    text = models.TextField(null=True, blank=True)
    date_created = models.DateTimeField()

    post = models.ForeignKey('Post', related_name='comments')

class Post(ContentTypeModel):
    title = models.CharField(max_length=255)
    group = models.ForeignKey('UserGroup', null=True)

    date_updated = models.DateTimeField()

有关如何跟踪帖子的最佳做法的建议被用户组的特定成员看到会很好。

Suggestions about best practices on how to track if post has been seen by particular member of a user group will be nice.

推荐答案

我设法按照建议的方式进行，即在轨道上添加m2m关系谁查看了帖子：

I managed to do as was suggested, i.e. adding m2m relation to track who viewed the post:

class Post(models.Model):
    ...
    date_updated = models.DateTimeField()
    viewers = models.ManyToManyField('UserProfile', through='PostViewer')

class PostViewer(models.Model):
    post = models.ForeignKey(Post, on_delete=models.CASCADE)
    viewer = models.ForeignKey('UserProfile', on_delete=models.CASCADE, related_name='posts_seen')

    last_seen = models.DateTimeField(null=True, blank=True, help_text='Is set when user sees the post in details')

    class Meta:
        unique_together = ('post', 'viewer')

这样，我可以将 post.date_updated 与 viewer.last_seen ，并根据需要过滤谁看到了Post的更新/创建。

This way i can compare post.date_updated to viewer.last_seen and get desired filtering on who have seen the update/create of Post.

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