New update_document_fields() method for partial document updates

CHANGELOG.md

@@ -1,6 +1,12 @@
 # Changelog
 ## [Unreleased]
 
+### Added
+
+- **Document Update API**: New `update_document_fields()` method for partial document updates
+  - Update individual fields (content, metadata, title, chunks) without fetching full document
+  - Support for custom chunks or auto-generation from content
+
 ### Changed
 
 - Updated core dependencies:

docs/python.md

@@ -101,11 +101,53 @@ docs = await client.list_documents(
 
 ### Updating Documents
 
+Update entire document:
 ```python
 doc.content = "Updated content"
 await client.update_document(doc)
 ```
 
+Update specific fields:
+```python
+# Update only content (triggers re-chunking)
+await client.update_document_fields(
+    document_id=doc.id,
+    content="New content"
+)
+
+# Update only metadata (no re-chunking)
+await client.update_document_fields(
+    document_id=doc.id,
+    metadata={"version": "2.0", "updated_by": "admin"}
+)
+
+# Update only title (no re-chunking)
+await client.update_document_fields(
+    document_id=doc.id,
+    title="New Title"
+)
+
+# Update multiple fields at once
+await client.update_document_fields(
+    document_id=doc.id,
+    content="New content",
+    title="Updated Title",
+    metadata={"status": "final"}
+)
+
+# Use custom chunks instead of auto-generation
+custom_chunks = [
+    Chunk(content="Custom chunk 1"),
+    Chunk(content="Custom chunk 2"),
+]
+await client.update_document_fields(
+    document_id=doc.id,
+    chunks=custom_chunks
+)
+```
+
+**Performance Note:** Updates to only `metadata` or `title` skip re-chunking for efficiency. Updates to `content` or `chunks` will regenerate or replace the document's chunks.
+
 ### Deleting Documents
 
 ```python

haiku_rag_slim/haiku/rag/client.py

@@ -417,6 +417,68 @@ class HaikuRAG:
             document, docling_document
         )
 
+    async def update_document_fields(
+        self,
+        document_id: str,
+        content: str | None = None,
+        metadata: dict | None = None,
+        chunks: list[Chunk] | None = None,
+        title: str | None = None,
+    ) -> Document:
+        """Update specific fields of a document by ID.
+
+        Args:
+            document_id: The ID of the document to update
+            content: New content for the document
+            metadata: New metadata for the document
+            chunks: Custom chunks to use instead of auto-generating
+            title: New title for the document
+
+        Returns:
+            The updated Document instance.
+        """
+        # Fetch the existing document
+        existing_doc = await self.get_document_by_id(document_id)
+        if existing_doc is None:
+            raise ValueError(f"Document with ID {document_id} not found")
+
+        # Update only the provided fields
+        if content is not None:
+            existing_doc.content = content
+        if title is not None:
+            existing_doc.title = title
+        if metadata is not None:
+            existing_doc.metadata = metadata
+
+        # Determine if we need to rechunk
+        if content is not None or chunks is not None:
+            # Content changed or custom chunks provided - need to rechunk
+            if chunks is not None:
+                # Use custom chunks
+                # Delete existing chunks
+                await self.chunk_repository.delete_by_document_id(document_id)
+
+                # Update document metadata
+                await self.document_repository.update(existing_doc)
+
+                # Add new chunks
+                for order, chunk in enumerate(chunks):
+                    chunk.document_id = document_id
+                    chunk.order = order
+                    await self.chunk_repository.create(chunk)
+
+                return existing_doc
+            else:
+                # Auto-generate chunks from content
+                converter = get_converter(self._config)
+                docling_document = converter.convert_text(existing_doc.content)
+                return await self.document_repository._update_and_rechunk(
+                    existing_doc, docling_document
+                )
+        else:
+            # Only metadata/title changed - no rechunking needed
+            return await self.document_repository.update(existing_doc)
+
     async def delete_document(self, document_id: str) -> bool:
         """Delete a document by its ID."""
         return await self.document_repository.delete(document_id)

tests/test_client.py

@@ -78,6 +78,77 @@ async def test_client_document_crud(qa_corpus: Dataset, temp_db_path):
         assert deleted_again is False
 
 
+@pytest.mark.asyncio
+async def test_client_update_document_fields(qa_corpus: Dataset, temp_db_path):
+    """Test updating document with individual parameters."""
+    async with HaikuRAG(temp_db_path) as client:
+        # Get test data
+        first_doc = qa_corpus[0]
+        document_text = first_doc["document_extracted"]
+        test_uri = "file:///path/to/test.txt"
+        test_metadata = {"source": "test", "topic": "testing"}
+
+        # Create a document
+        created_doc = await client.create_document(
+            content=document_text,
+            uri=test_uri,
+            title="Original Title",
+            metadata=test_metadata,
+        )
+        assert created_doc.id is not None
+        original_id = created_doc.id
+
+        # Test updating only content
+        updated_doc = await client.update_document_fields(
+            document_id=original_id, content="Updated content only"
+        )
+        assert updated_doc.id == original_id
+        assert updated_doc.content == "Updated content only"
+        assert updated_doc.title == "Original Title"
+        assert updated_doc.uri == test_uri
+
+        # Test updating only metadata
+        new_metadata = {"source": "updated", "version": "2.0"}
+        updated_doc = await client.update_document_fields(
+            document_id=original_id, metadata=new_metadata
+        )
+        assert updated_doc.metadata == new_metadata
+        assert (
+            updated_doc.content == "Updated content only"
+        )  # Should keep previous update
+
+        # Test updating only title
+        updated_doc = await client.update_document_fields(
+            document_id=original_id, title="New Title"
+        )
+        assert updated_doc.title == "New Title"
+        assert updated_doc.content == "Updated content only"
+        assert updated_doc.metadata == new_metadata
+
+        # Test updating multiple fields at once
+        custom_chunks = [
+            Chunk(content="Custom chunk 1", order=0),
+            Chunk(content="Custom chunk 2", order=1),
+        ]
+        updated_doc = await client.update_document_fields(
+            document_id=original_id,
+            content="Content with custom chunks",
+            title="Final Title",
+            metadata={"final": "true"},
+            chunks=custom_chunks,
+        )
+        assert updated_doc.id == original_id
+        assert updated_doc.content == "Content with custom chunks"
+        assert updated_doc.title == "Final Title"
+        assert updated_doc.metadata == {"final": "true"}
+
+        # Verify the custom chunks were created
+        doc_chunks = await client.chunk_repository.get_by_document_id(original_id)
+        assert len(doc_chunks) == 2
+        assert doc_chunks[0].content == "Custom chunk 1"
+        assert doc_chunks[1].content == "Custom chunk 2"
+
+
 @pytest.mark.asyncio
 async def test_client_create_document_from_source(temp_db_path):
     """Test creating a document from a file source."""