added Comment model

civicfix/core/models.py

@@ -1,7 +1,6 @@
-from django.db import models
 from django.contrib.auth.models import AbstractUser
-from django.urls import reverse
 from django.core.validators import FileExtensionValidator
+from django.db import models
 
 class User(AbstractUser):
     is_citizen = models.BooleanField(default=False)
@@ -76,3 +75,20 @@ class Vote(models.Model):
 
     def __str__(self):
         return f"{self.user.username} voted on {self.issue.title}"
+
+class Comment(models.Model):
+    issue = models.ForeignKey(Issue, on_delete=models.CASCADE, related_name="comments")
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
+    content = models.TextField()   # <--- field name is "content", not "text"
+    parent = models.ForeignKey("self", null=True, blank=True, related_name="replies", on_delete=models.CASCADE)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        ordering = ["created_at"]
+
+    def __str__(self):
+        return f"Comment by {self.user} on {self.issue}"
+
+    @property
+    def is_reply(self):
+        return self.parent is not None