model containing himself in a many to many

Using Django
1

hello,

I am trying to make uni course models, which means that every course has courses that “blocks him” (courses you have to take before you take this course).
I want to have a var like so:

    blocked_by = models.ManyToManyField(course,related_name="blocking",blank=True,null=True,default=None)

in side the course itself, but it gives me compiler error,

image
image1075×678 43.4 KB

any ideas?

2

See the docs on ForeignKeys on how to define models that refer to themselves. (The docs for ManyToManyField specify that a recursive definition for it works exactly the same way as a ForeignKey field.)