Add Metadata table and read write delete functions

cognee/modules/data/models/Data.py

@@ -15,6 +15,7 @@ class Data(Base):
     extension = Column(String)
     mime_type = Column(String)
     raw_data_location = Column(String)
+    metadata_id = Column(UUID)
 
     created_at = Column(DateTime(timezone = True), default = lambda: datetime.now(timezone.utc))
     updated_at = Column(DateTime(timezone = True), onupdate = lambda: datetime.now(timezone.utc))

cognee/modules/ingestion/models/metadata.py

@@ -0,0 +1,13 @@
+from uuid import uuid4
+from datetime import datetime, timezone
+from sqlalchemy import Column, DateTime, String, UUID
+from cognee.infrastructure.databases.relational import Base
+
+class Metadata(Base):
+    __tablename__ = "queries"
+
+    id = Column(UUID, primary_key = True, default = uuid4)
+    metadata = Column(String)
+    
+    created_at = Column(DateTime(timezone = True), default = lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime(timezone = True), onupdate = lambda: datetime.now(timezone.utc))

cognee/modules/ingestion/operations/delete_metadata.py

@@ -0,0 +1,16 @@
+import warnings
+from uuid import UUID
+from sqlalchemy import select
+from cognee.infrastructure.databases.relational import get_relational_engine
+from ..models.Metadata import Metadata
+
+
+async def delete_metadata(metadata_id: UUID):
+    db_engine = get_relational_engine()
+    async with db_engine.get_async_session() as session:
+        metadata = await session.get(Metadata, metadata_id)
+        if metadata is None:
+            warnings.warn(f"metadata for metadata_id: {metadata_id} not found")
+        
+        session.delete(metadata)
+        session.commit()

cognee/modules/ingestion/operations/get_metadata.py

@@ -0,0 +1,13 @@
+import json
+from uuid import UUID
+from sqlalchemy import select
+from cognee.infrastructure.databases.relational import get_relational_engine
+from ..models.Metadata import Metadata
+
+async def get_metadata(metadata_id: UUID) -> Metadata:
+    db_engine = get_relational_engine()
+
+    async with db_engine.get_async_session() as session:
+        metadata = await session.get(Metadata, metadata_id)
+
+        return json.parse(metadata)

cognee/modules/ingestion/operations/write_metadata.py

@@ -0,0 +1,41 @@
+import json
+import inspect
+import warnings
+import re
+from typing import Any
+
+from uuid import UUID
+from cognee.infrastructure.databases.relational import get_relational_engine
+from ..models.Metadata import Metadata
+
+async def write_metadata(data_item: Any) -> UUID:
+    metadata_dict = get_metadata_dict(data_item)
+    db_engine = get_relational_engine()
+    async with db_engine.get_async_session() as session:
+        metadata = Metadata(
+            metadata = json.dumps(metadata_dict),
+            metadata_source = parse_type(type(data_item))
+        )
+        session.add(metadata)
+        await session.commit()
+
+        return metadata.id
+
+def parse_type(type_: Any) -> str:
+    pattern = r".+'([\w_\.]+)'"
+    match = re.search(pattern, str(type_))
+    if match:
+        return(match.group(1))
+    else:
+        raise Exception(f"type: {type_} could not be parsed")
+
+
+def get_metadata_dict(metadata: Any) -> dict[str, Any]:
+    if hasattr(metadata, "dict") and inspect.ismethod(getattr(metadata, "dict")):
+        return(metadata.dict())
+    else:
+        warnings.warn(f"metadata of type {type(metadata)}: {str(metadata)[:20]}... does not have dict method. Defaulting to string method")
+        try:
+            return({"content": str(metadata)})
+        except Exception as e:
+            raise Exception(f"Could not cast metadata to string: {e}")

cognee/tasks/ingestion/ingest_data_with_metadata.py

@@ -8,6 +8,7 @@ from cognee.modules.data.methods import create_dataset
 from cognee.modules.users.permissions.methods import give_permission_on_document
 from .get_dlt_destination import get_dlt_destination
 from .save_data_item_with_metadata_to_storage import save_data_item_with_metadata_to_storage
+from cognee.modules.ingestion.operations.delete_metadata import delete_metadata
 
 async def ingest_data_with_metadata(data: Any, dataset_name: str, user: User):
     destination = get_dlt_destination()
@@ -26,7 +27,7 @@ async def ingest_data_with_metadata(data: Any, dataset_name: str, user: User):
         # Process data
         for data_item in data:
 
-            file_path = save_data_item_with_metadata_to_storage(data_item, dataset_name)
+            file_path, metadata_id = await save_data_item_with_metadata_to_storage(data_item, dataset_name)
 
             # Ingest data and add metadata
             with open(file_path.replace("file://", ""), mode = "rb") as file:
@@ -49,11 +50,12 @@ async def ingest_data_with_metadata(data: Any, dataset_name: str, user: User):
                     )).scalar_one_or_none()
 
                     if data_point is not None:
+                        await delete_metadata(data_point.metadata_id)
                         data_point.name = file_metadata["name"]
                         data_point.raw_data_location = file_metadata["file_path"]
                         data_point.extension = file_metadata["extension"]
                         data_point.mime_type = file_metadata["mime_type"]
-
+                        data_point.metadata_id = metadata_id
                         await session.merge(data_point)
                         await session.commit()
                     else:
@@ -63,6 +65,7 @@ async def ingest_data_with_metadata(data: Any, dataset_name: str, user: User):
                             raw_data_location = file_metadata["file_path"],
                             extension = file_metadata["extension"],
                             mime_type = file_metadata["mime_type"],
+                            metadata_id = metadata_id
                         )
 
                         dataset.data.append(data_point)

cognee/tasks/ingestion/save_data_item_with_metadata_to_storage.py

@@ -1,14 +1,15 @@
 from typing import Union, BinaryIO, Any
 from cognee.modules.ingestion import save_data_to_file
+from cognee.modules.ingestion.operations.write_metadata import write_metadata
 
 def save_data_item_with_metadata_to_storage(data_item: Union[BinaryIO, str, Any], dataset_name: str) -> str:
     # Dynamic import is used because the llama_index module is optional. 
     # For the same reason Any is accepted as a data item
-    from llama_index.core import Document
-    from .transform_data import get_data_from_llama_index
+    metadata_id = write_metadata(data_item)
 
     # Check if data is of type Document or any of it's subclasses
-    if isinstance(data_item, Document):
+    if str(type(data_item)).startswith("llama_index"):
+        from .transform_data import get_data_from_llama_index
         file_path = get_data_from_llama_index(data_item, dataset_name)
 
     # data is a file object coming from upload.
@@ -25,4 +26,4 @@ def save_data_item_with_metadata_to_storage(data_item: Union[BinaryIO, str, Any]
     else:
         raise ValueError(f"Data type not supported: {type(data_item)}")
 
-    return file_path
+    return file_path, metadata_id