rating and comment system complete

nonpacks/library/models.py

@@ -113,6 +113,8 @@ class Project(models.Model):
     )
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)
+    rating_score = models.IntegerField(default=0)
+    rating_count = models.PositiveIntegerField(default=0)
 
     def __str__(self):
         return self.title
@@ -341,3 +343,39 @@ class ProjectDraft(models.Model):
 
     def __str__(self):
         return f'Draft for {self.user.username}'
+
+
+class Rating(models.Model):
+    """One user's up/down vote on a project (Steam-style overall rating).
+
+    A user may hold a single vote per project; changing it edits this row.
+    ``rating_score``/``rating_count`` on Project mirror the aggregate."""
+    project = models.ForeignKey(Project, on_delete=models.CASCADE, related_name='ratings')
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='ratings',
+    )
+    value = models.BooleanField(default=True)  # True=positive/up, False=negative/down
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(fields=['project', 'user'], name='uniq_rating_project_user'),
+        ]
+
+    def __str__(self):
+        return f'{"+" if self.value else "-"}{self.user.username} on {self.project.slug}'
+
+
+class Comment(models.Model):
+    """A forum-style comment on a project. Unlimited; body is Markdown."""
+    project = models.ForeignKey(Project, on_delete=models.CASCADE, related_name='comments')
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='comments',
+    )
+    body = models.TextField()
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    def __str__(self):
+        return f'{self.user.username} on {self.project.slug}: {self.body[:40]}'