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Python

Posted by Robert Stallard
Robert Stallard
8,818 Points

course.step_set.all origins

In the Python Django Basics course, the templating for course_detail.html makes use of the loop:

{% for step in course.step_set.all %}
            <h3>{{ step.title }}</h3>
            {{ step.description }}
{% endfor %}

Where does the step_set come from? I do not recall explicitly defining that anywhere during the course and a search doesn't yield anything attaching it to an explicit class (although I am not certain how to search for such a thing).

The Step Class contains the line 

course = models.ForeignKey(Course)

Is this the connection between course and step that makes course.step_all work? If that is the case, how is it understood that *_all is a function?

Is it the case that Django makes assumptions about what it is being used for,

Further, is the .all() (parenthesis suppressed) the built-in .all()?