编写后端

backend/app/models/post.py

@@ -0,0 +1,94 @@
+"""
+文章模型
+"""
+import uuid
+from datetime import datetime
+from tortoise import fields, models
+
+
+class Post(models.Model):
+    """文章模型"""
+
+    id = fields.UUIDField(pk=True, default=uuid.uuid4)
+    title = fields.CharField(max_length=200, description="文章标题")
+    slug = fields.CharField(max_length=200, unique=True, description="URL别名")
+    content = fields.TextField(description="文章内容(Markdown)")
+    summary = fields.TextField(null=True, description="文章摘要")
+    cover_image = fields.CharField(max_length=500, null=True, description="封面图片URL")
+
+    # 关联用户（作者）
+    author = fields.ForeignKeyField(
+        "models.User",
+        related_name="posts",
+        on_delete=fields.CASCADE,
+        description="作者"
+    )
+
+    # 关联分类
+    category = fields.ForeignKeyField(
+        "models.Category",
+        related_name="posts",
+        on_delete=fields.SET_NULL,
+        null=True,
+        description="分类"
+    )
+
+    # 标签（多对多）
+    tags = fields.ManyToManyField(
+        "models.Tag",
+        related_name="posts",
+        through="post_tags",
+        description="标签"
+    )
+
+    # 统计数据
+    view_count = fields.IntField(default=0, description="浏览量")
+    like_count = fields.IntField(default=0, description="点赞数")
+    comment_count = fields.IntField(default=0, description="评论数")
+
+    # 状态：draft(草稿), published(已发布), archived(已归档)
+    status = fields.CharField(
+        max_length=20,
+        default="draft",
+        description="文章状态"
+    )
+
+    # SEO
+    meta_title = fields.CharField(max_length=200, null=True, description="SEO标题")
+    meta_description = fields.TextField(null=True, description="SEO描述")
+
+    # 时间戳
+    published_at = fields.DatetimeField(null=True, description="发布时间")
+    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 = "posts"
+        ordering = ["-created_at"]
+        indexes = [
+            ("status", "published_at"),
+            ("author", "status"),
+        ]
+
+    def __str__(self):
+        return self.title
+
+
+class PostTag(models.Model):
+    """文章-标签关联表"""
+
+    id = fields.UUIDField(pk=True, default=uuid.uuid4)
+    post = fields.ForeignKeyField(
+        "models.Post",
+        on_delete=fields.CASCADE,
+        description="文章"
+    )
+    tag = fields.ForeignKeyField(
+        "models.Tag",
+        on_delete=fields.CASCADE,
+        description="标签"
+    )
+
+    class Meta:
+        table = "post_tags"
+        unique_together = (("post", "tag"),)