feat: implement LMS core (CMS, Courses, Enrollment, Progress, Auth) (Admin + API)

apps/courses/models.py

@@ -1,3 +1,73 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models
+from core import settings
+
+User = settings.AUTH_USER_MODEL
+
+class Enrollment(models.Model):
+    user = models.ForeignKey(
+        User,
+        on_delete=models.CASCADE,
+        related_name='enrollments',
+    )
+    course = models.ForeignKey(
+        "Course",
+        on_delete=models.CASCADE,
+        related_name='enrollments',
+    )
+    enrolled_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        unique_together = (('user', 'course'),)
+        verbose_name = "การลงทะเบียนเรียน"
+        verbose_name_plural = "การลงทะเบียนเรียน"
+
+    def __str__(self):
+        return f"{self.user} enrolled in {self.course}"
+
+class LessonProgress(models.Model):
+    user = models.ForeignKey(
+        User,
+        on_delete=models.CASCADE,
+        related_name='lesson_progress',
+    )
+    lesson = models.ForeignKey(
+        "Lesson",
+        on_delete=models.CASCADE,
+        related_name='progress_records',
+    )
+    completed = models.BooleanField(default=False)
+    complete_at = models.DateTimeField(auto_now_add=True)
+    class Meta:
+        unique_together = (('user', 'lesson'),)
+        verbose_name = "ความคืบหน้าบทเรียน"
+        verbose_name_plural = "ความคืบหน้าบทเรียน"
+
+class Course(models.Model):
+    title = models.CharField(max_length=200)
+    description = models.TextField()
+    published = models.BooleanField(default=False)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        verbose_name = "หลักสูตร"
+        verbose_name_plural = "หลักสูตร"
+
+    def __str__(self):
+        return self.title
+
+class Lesson(models.Model):
+    course = models.ForeignKey(
+        Course,
+        related_name='lessons',
+        on_delete=models.CASCADE
+    )
+    title = models.CharField(max_length=200)
+    content = models.TextField()
+    order = models.PositiveIntegerField(default=0)
+
+    class Meta:
+        verbose_name = "บทเรียน"
+        verbose_name_plural = "บทเรียน"
+
+    def __str__(self):
+        return f"{self.course.title} - {self.title}"