编写后端

backend/app/models/comment.py

@@ -0,0 +1,49 @@
+"""
+评论模型
+"""
+import uuid
+from tortoise import fields, models
+
+
+class Comment(models.Model):
+    """评论模型"""
+
+    id = fields.UUIDField(pk=True, default=uuid.uuid4)
+    content = fields.TextField(description="评论内容")
+    is_approved = fields.BooleanField(default=True, description="是否审核通过")
+
+    # 关联用户（评论者）
+    author = fields.ForeignKeyField(
+        "models.User",
+        related_name="comments",
+        on_delete=fields.CASCADE,
+        description="评论者"
+    )
+
+    # 关联文章
+    post = fields.ForeignKeyField(
+        "models.Post",
+        related_name="comments",
+        on_delete=fields.CASCADE,
+        description="所属文章"
+    )
+
+    # 自关联（回复）
+    parent = fields.ForeignKeyField(
+        "models.Comment",
+        related_name="replies",
+        on_delete=fields.CASCADE,
+        null=True,
+        description="父评论"
+    )
+
+    # 时间戳
+    created_at = fields.DatetimeField(auto_now_add=True, description="创建时间")
+    updated_at = fields.DatetimeField(auto_now=True, description="更新时间")
+
+    class Meta:
+        table = "comments"
+        ordering = ["created_at"]
+
+    def __str__(self):
+        return f"Comment by {self.author.username} on {self.post.title}"