I can't solve the problem. Slicing a list with an if else statement?

Question

Django

The essence of the question is this, I'm still a green pythonist, and help would not hurt me. There is an admin panel where the data goes through the foreign key relation ForeignKey. You need to write code like this, if the entry exceeds 50 characters, then + "..." is added to the list, if the list is less than 50 characters, then the ellipsis is not added.
1) Admin panel with available data output:

2) The task itself:

3) Code:

from django.db import models

class Topic(models.Model):
  text = models.CharField(max_length=200)
  date_added = models.DateTimeField(auto_now_add=True)

  def __str__(self):
    return self.text

class Entry(models.Model):
  topic = models.ForeignKey(Topic, on_delete=models.CASCADE)
  text = models.TextField()
  date_added = models.DateTimeField(auto_now_add=True)

  class Meta:
    verbose_name_plural = 'entries'

  def __str__(self):
    return f"{self.text[:50]}..."

Answer 1

def __str__(self):
    return f"{self.text[:50]}..." if len(self.text) > 50 else self.text