Confused about performer.song_set.all in performer_detail.html

Hi TeamTreehouse

First let me thank you for such a great course. I really enjoyed it and also liked the final exercise for the Django Basics Course. However, I must admit that I did run into trouble. I was able to resolve it by looking at a forum entry which pointed me to the performer_detail.html. My problem is that although I made it work I am not entirely sure why it is working. My performer_detail.html now looks like this:

{% extends 'base.html' %}

{% block title %}{{ performer.name }}{% endblock %}

{% block content %}
<h2>{{ performer.name }}</h2>
<section>
  {% for each_song in performer.song_set.all %}
    <h3>{{ each_song }}</h3>
  {% endfor %}  
</section>
{% endblock %}

The problem I have is that I don't understand how performer.song_set.all can fetch a set of songs we made in the Song class in models.py? The reason for my confusion is that in class Song(models.Model) we defined performer as performer = performer = models.ForeignKey("Performer", default=1) meaning that there is a 1:1 relationship between Song and Performer. Each song must have a performer. As such I do understand how, if we make an instance of Song, our database would point to the corresponding performer.

What I do struggle with is how our database points from Performer to Songs?. In the view for performer_detail we instantiated Performer and not Song. And because the Performer model odes not point to the Song class, I am struggling to see how we can query this performer.song_set.all which to me is like saying:

"Dear Python. Please give us the set of songs associated with this performer".

While we established in our model how each Performer belongs to a Song (through the ForeignKey function)my mind can't wrap itself around how we know which Song belongs to which Performer. Or am I thinking about this the wrong way?

Any help would be highly appreciated and thank you again for such a great course!

[MOD: added ```jinja formating -cf]