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Python Customizing the Django Admin Customizing the List View Test: Custom Attributes

Tobias Mahnert
Tobias Mahnert
89,414 Points
Posted by Tobias Mahnert
Tobias Mahnert
89,414 Points

Stuck with this Code Challenge

Stuck... Who can help me out or give me a useful tipp?

Add a method to the Quiz model, named number_correct_needed that returns a string showing the number of correct answers needed to get at least 70% on the quiz. Your string should include the number needed and the total number. An example would be "7/10". Use the ceil function in the math module which has already been imported for you.

courses/models.py 
from django.db import models
import math 

class Step(models.Model):
    title = models.CharField(max_length=255)
    description = models.TextField()
    order = models.IntegerField(default=0)

    class Meta:
        abstract = True
        ordering = ['order',]

    def __str__(self):
        return self.title

class Quiz(Step):
    total_questions = models.IntegerField()
courses/admin.py 
from django.contrib import admin 

from . import models

class QuizAdmin(admin.ModelAdmin):
    list_display = ['title', 'course']

2 Answers

Tobias Mahnert
Tobias Mahnert
89,414 Points
Tobias Mahnert
Tobias Mahnert
89,414 Points

Never Mind I just solved it and I'd like to share my solutionas others may stuck and get frustrated as well. This is for task one

    def number_correct_needed(self):
      total = self.total_questions
      needed = ((total/100)*70)

      return "{}/{}".format(math.ceil(needed), math.ceil(total))
Erika Suzuki
Erika Suzuki
20,299 Points
Erika Suzuki
Erika Suzuki
20,299 Points

So, this means, I would have to study math in order for me to complete this challenge by myself.

Øyvind Andreassen
Øyvind Andreassen
16,839 Points
Øyvind Andreassen
Øyvind Andreassen
16,839 Points

This is also a valid solution. No need to ask for ceil on the total number of questions, since we can presume that a quiz don't have 4.5/6.7/14.2/ect. questions.

    def number_correct_needed(self):
        return "{}/{}".format(math.ceil(self.total_questions*0.7), self.total_questions)