如何在 MCQ 中为 django 模型定义自动评估和尝试多次约束？

Question

我正在开发一个基于 MCQ 的 django 项目，根据我的研究，我有以下从第 3 方参考中获得的模型。当然，我必须根据我的自定义需求进行一些修改。下面是来自 models.py:

的片段

from django.db import models
from django.contrib.auth.models import User
from django.template.defaultfilters import slugify
from django.db.models.signals import post_save, pre_save
from django.dispatch import receiver


class Quiz(models.Model):
    name = models.CharField(max_length=1000)
    questions_count = models.IntegerField(default=0)
    description = models.CharField(max_length=70)
    created = models.DateTimeField(auto_now_add=True,null=True,blank=True)
    slug = models.SlugField()
    roll_out = models.BooleanField(default=False)

    class Meta:
        ordering = ['created', ]
        verbose_name_plural = 'Quizzes'

    def __str__(self):
        return self.name


class Question(models.Model):
    quiz = models.ForeignKey(Quiz, on_delete=models.CASCADE)
    label = models.CharField(max_length=1000)
    order = models.IntegerField(default=0)
    marks = models.IntegerField(default=0)
    optional = models.BooleanField(default=False)

    def __str__(self):
        return self.label


class Answer(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    text = models.CharField(max_length=1000)
    is_correct = models.BooleanField(default=False)

    def __str__(self):
        return self.text


class QuizTakers(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    quiz = models.ForeignKey(Quiz, on_delete=models.CASCADE)
    correct_answers = models.IntegerField(default=0)
    completed = models.BooleanField(default=False)
    timestamp = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.user.username


class Response(models.Model):
    quiztaker = models.ForeignKey(QuizTakers, on_delete=models.CASCADE)
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    answer = models.ForeignKey(Answer,on_delete=models.CASCADE,null=True,blank=True)

    def __str__(self):
        return self.question.label


@receiver(post_save, sender=Quiz)
def set_default_quiz(sender, instance, created, **kwargs):
    quiz = Quiz.objects.filter(id=instance.id)
    quiz.update(questions_count=instance.question_set.filter(quiz=instance.pk).count())


@receiver(post_save, sender=Question)
def set_default(sender, instance, created, **kwargs):
    quiz = Quiz.objects.filter(id=instance.quiz.id)
    quiz.update(questions_count=instance.quiz.question_set.filter(quiz=instance.quiz.pk).count())


@receiver(pre_save, sender=Quiz)
def slugify_title(sender, instance, *args, **kwargs):
    instance.slug = slugify(instance.name)

但是，我已经为我的 MCQ 实施了几个要点，但我无法找到合适的解决方案。以下是要点。

1) Every quiz can be attempted multiple times by the quiz taker. No restriction.
2) Since the questions are in MCQ format, the quiz taker answers are auto-evaluated by the application.

非常感谢任何帮助。

谢谢。

Answer 1

回答你的两个问题：

由于每个测验都可以进行多次，因此您只需要一个重置按钮即可。单击该按钮后，它将删除 QuizTaker。然后您将能够再次创建它。
创建测验时，所有问题都有答案，其中一个答案是正确的。因此，您可以定义一个函数来检查提供的响应是否等于正确答案，然后为每个正确答案将正确答案的数量增加 1。

希望对您有所帮助！！

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