init: initial Django LMS backend

apps/accounts/models.py

@@ -0,0 +1,68 @@
+from django.contrib.auth.models import AbstractUser
+from django.db import models
+
+class CustomUser(AbstractUser):
+    email = models.EmailField(unique=True)
+    phone = models.CharField(max_length=20, blank=True)
+
+    USERNAME_FIELD = 'email'
+    REQUIRED_FIELDS = ['username']
+
+    @property
+    def role(self):
+        roles = []
+        if hasattr(self, 'studentprofile'):
+            roles.append("student")
+        if hasattr(self, 'instructorprofile'):
+            roles.append("instructor")
+        if hasattr(self, 'adminprofile'):
+            roles.append("admin")
+        return roles
+
+    def save(self, *args, **kwargs):
+        if self.email:
+            self.email = self.email.lower().strip()
+        super().save(*args, **kwargs)
+
+    class Meta:
+        verbose_name = "บัญชีผู้ใช้งาน"
+        verbose_name_plural = "บัญชีผู้ใช้งาน"
+
+    def __str__(self):
+        return self.email
+
+class BaseRoleProfile(models.Model):
+    user = models.OneToOneField(
+        CustomUser,
+        on_delete=models.CASCADE,
+    )
+    is_active = models.BooleanField(default=True)
+
+    class Meta:
+        abstract = True
+
+class StudentProfile(BaseRoleProfile):
+    interests = models.TextField(blank=True)
+
+    class Meta:
+        verbose_name = "ผู้เรียน"
+        verbose_name_plural = "ผู้เรียน"
+
+class InstructorProfile(BaseRoleProfile):
+    bio = models.TextField(blank=True)
+    expertise = models.CharField(max_length=200, blank=True)
+    is_verified = models.BooleanField(default=False)
+
+    class Meta:
+        verbose_name = "ผู้สอน"
+        verbose_name_plural = "ผู้สอน"
+
+    def __str__(self):
+        return f"Instructor: {self.user.email}"
+
+class AdminProfile(BaseRoleProfile):
+    is_super = models.BooleanField(default=False)
+
+    class Meta:
+        verbose_name = "ผู้ดูแลระบบ"
+        verbose_name_plural = "ผู้ดูแลระบบ"