__str __（）中的rjust（）在Django中不起作用

Question

I have a model class with level and name fields (it's about subcategories levels).

I want to display the name of each row with corresponding number of dashes indent in the select dropdown in the admin panel.

When I use:

def __str__(self):
    return self.name.rjust((self.level-1) * 4, '-')

in the Django model, it doesn't work and keeps showing me the name without the dashes.

If I use the same code in a pure Python script, it does work. Debug showed that self.level has correct value in the __str__() Django function.

Why it doesn't work in Django?

Update: I fixed it with the obvious:

def __str__(self):
    indent = '-' * (self.level-1) * 4
    return indent + self.name

However, the question why it doesn't work in Django is still open.

Answer 1

Your 2 examples aren't the same. rjust doesn't insert the number of fill characters you specify, it inserts the number needed to fill out that total length. If self.name is long enough, it will be returned unchanged