M2M with self throught int. table, how to access related items?

Hi,

I am not a django guru (yet) and I am having what I would guess a
trivial django question. Here is my table setup stripped:

class Post(models.Model):

relevancy =
models.ManyToManyField("self",through="Traffic",symmetrical=False,related_name="relevant",blank=True)

class Traffic(models.Model):
tfrom = models.ForeignKey(Post,related_name="tfrom")
tto = models.ForeignKey(Post,related_name="tto")
count = models.PositiveIntegerField(default=0)

This is to be a simple visitor tendency tool, which I keep records of
which link clicked on which post. I am confused about, getting related
items. For example, given a post, how to get set of posts which have
traffic from the post (post.tfrom_set ? ), or how to get post with a
max "count" which is trafficked to the post
( post.tto_set.max("count") ? ) etc.

PS: English is not my main language. Sorry if I wasn't clear

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