6

backend/app/models/document.py

@@ -37,12 +37,23 @@ class Document(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     original_filename: Mapped[str] = mapped_column(
         String(512),
         nullable=False,
-        comment="原始文件名 (仅展示)",
+        comment="原始文件名或文本标题 (仅展示)",
     )
-    storage_path: Mapped[str] = mapped_column(
+    storage_path: Mapped[str | None] = mapped_column(
         String(1024),
+        nullable=True,
+        comment="相对于 data/ 的物理存储路径（文本内容文档为 NULL）",
+    )
+    content: Mapped[str | None] = mapped_column(
+        Text,
+        nullable=True,
+        comment="直接输入的文本内容（非文件上传时使用）",
+    )
+    content_format: Mapped[str] = mapped_column(
+        String(16),
+        default="markdown",
         nullable=False,
-        comment="相对于 data/ 的物理存储路径",
+        comment="内容格式：markdown / text",
     )
     markdown_path: Mapped[str | None] = mapped_column(
         String(1024),
@@ -51,23 +62,26 @@ class Document(UUIDPrimaryKeyMixin, TimestampMixin, Base):
     )
     file_size: Mapped[int] = mapped_column(
         Integer,
+        default=0,
         nullable=False,
-        comment="文件大小 (字节)",
+        comment="文件大小 (字节)，文本内容文档为内容长度",
     )
     mime_type: Mapped[str] = mapped_column(
         String(127),
+        default="text/markdown",
         nullable=False,
         comment="MIME 类型",
     )
     file_ext: Mapped[str] = mapped_column(
         String(16),
+        default=".md",
         nullable=False,
-        comment="文件扩展名 (.docx/.pdf)",
+        comment="文件扩展名 (.docx/.pdf/.md)",
     )
-    sha256: Mapped[str] = mapped_column(
+    sha256: Mapped[str | None] = mapped_column(
         String(64),
-        nullable=False,
-        comment="文件 SHA-256 哈希",
+        nullable=True,
+        comment="文件 SHA-256 哈希（文本内容文档为 NULL）",
     )
     doc_token_hash: Mapped[str] = mapped_column(
         String(64),