89 lines
4.3 KiB
Python
89 lines
4.3 KiB
Python
from django.db import models
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from uuid import uuid4
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from django.contrib.auth import get_user_model
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from rest_framework.exceptions import ValidationError
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User = get_user_model()
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# Table for courses (Course)
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class Course(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
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title = models.CharField(max_length=255, verbose_name="Course Title")
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description = models.TextField(verbose_name="Course Description")
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image = models.ImageField(upload_to="courses/image", null=True)
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is_paid = models.BooleanField(default=False)
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price = models.DecimalField(max_digits=10, decimal_places=2, null=True, blank=True)
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instructor = models.ForeignKey(User, on_delete=models.CASCADE, related_name='courses_taught', verbose_name="Instructor")
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rating = models.PositiveSmallIntegerField(null=True, blank=True)
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created_at = models.DateTimeField(auto_now_add=True, verbose_name="Created At")
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updated_at = models.DateTimeField(auto_now=True, verbose_name="Updated At")
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def str(self):
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return self.title
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def clean(self):
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if self.is_paid and (self.price is None or self.price <= 0):
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raise ValidationError({'price': 'Price must be set and greater than 0 for paid products.'})
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if not self.is_paid and self.price:
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raise ValidationError({'price': 'Price must be empty for free products.'})
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# Table for modules (Module)
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class Module(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
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title = models.CharField(max_length=255, verbose_name="Module Title")
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description = models.TextField(verbose_name="Module Description")
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course = models.ForeignKey(Course, on_delete=models.CASCADE, related_name='modules', verbose_name="Course")
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order = models.PositiveIntegerField(default=0, verbose_name="Order", unique=True)
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def str(self):
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return self.title
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# Table for lessons (Lesson)
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class Lesson(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
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title = models.CharField(max_length=255, verbose_name="Lesson Title")
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content = models.TextField(verbose_name="Lesson Content")
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module = models.ForeignKey(Module, on_delete=models.CASCADE, related_name='lessons', verbose_name="Module")
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order = models.PositiveIntegerField(default=0, verbose_name="Order")
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file = models.FileField(upload_to='lesson_files/', null=True, blank=True, verbose_name="Attached File")
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def str(self):
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return self.title
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# Table for enrollments (Enrollment)
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class Enrollment(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
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student = models.ForeignKey(User, on_delete=models.CASCADE, related_name='enrollments', verbose_name="Student")
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course = models.ForeignKey(Course, on_delete=models.CASCADE, related_name='enrollments', verbose_name="Course")
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enrolled_at = models.DateTimeField(auto_now_add=True, verbose_name="Enrollment Date")
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completed = models.BooleanField(default=False, verbose_name="Completed")
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def str(self):
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return f"{self.student.username} - {self.course.title}"
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# Table for quizzes (Quiz)
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class Quiz(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
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title = models.CharField(max_length=255, verbose_name="Quiz Title")
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module = models.ForeignKey(Module, on_delete=models.CASCADE, related_name='quiz', verbose_name="Module")
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questions = models.JSONField(verbose_name="Questions", null=True) # Stores questions as a JSON list
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def str(self):
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return self.title
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def str(self):
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return f"{self.student.username} - {self.quiz.title}"
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# Table for certificates (Certificate)
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class Certificate(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
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student = models.ForeignKey(User, on_delete=models.CASCADE, related_name='certificates', verbose_name="Student")
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course = models.ForeignKey(Course, on_delete=models.CASCADE, related_name='certificates', verbose_name="Course")
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issued_at = models.DateTimeField(auto_now_add=True, verbose_name="Issued At")
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certificate_file = models.FileField(upload_to='certificates/', verbose_name="Certificate File")
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def str(self):
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return f"{self.student.username} - {self.course.title}"
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