feat: remove n+1 query knowledge (#3238)

# Description

closes #3237

backend/api/quivr_api/modules/knowledge/entity/knowledge.py

@@ -115,7 +115,9 @@ class KnowledgeDB(AsyncAttrs, SQLModel, table=True):
     )
 
     # TODO: nested folder search
-    async def to_dto(self, get_children: bool = True) -> Knowledge:
+    async def to_dto(
+        self, get_children: bool = True, get_parent: bool = True
+    ) -> Knowledge:
         assert (
             self.updated_at
         ), "knowledge should be inserted before transforming to dto"
@@ -126,7 +128,7 @@ async def to_dto(self, get_children: bool = True) -> Knowledge:
         children: list[KnowledgeDB] = (
             await self.awaitable_attrs.children if get_children else []
         )
-        parent = await self.awaitable_attrs.parent
+        parent = await self.awaitable_attrs.parent if get_parent else None
         parent = await parent.to_dto(get_children=False) if parent else None
 
         return Knowledge(

backend/api/quivr_api/modules/knowledge/repository/knowledges.py

@@ -245,8 +245,15 @@ async def get_knowledge_by_id(
             raise KnowledgeNotFoundException("Knowledge not found")
         return knowledge
 
-    async def get_brain_by_id(self, brain_id: UUID) -> Brain:
+    async def get_brain_by_id(
+        self, brain_id: UUID, get_knowledge: bool = False
+    ) -> Brain:
         query = select(Brain).where(Brain.brain_id == brain_id)
+        if get_knowledge:
+            query = query.options(
+                joinedload(Brain.knowledges).joinedload(KnowledgeDB.brains)
+            )
+
         result = await self.session.exec(query)
         brain = result.first()
         if not brain:

backend/api/quivr_api/modules/knowledge/service/knowledge_service.py

@@ -208,10 +208,12 @@ async def insert_knowledge_brain(
         return inserted_knowledge
 
     async def get_all_knowledge_in_brain(self, brain_id: UUID) -> List[Knowledge]:
-        brain = await self.repository.get_brain_by_id(brain_id)
-
-        all_knowledges = await brain.awaitable_attrs.knowledges
-        knowledges = [await knowledge.to_dto() for knowledge in all_knowledges]
+        brain = await self.repository.get_brain_by_id(brain_id, get_knowledge=True)
+        all_knowledges: List[KnowledgeDB] = await brain.awaitable_attrs.knowledges
+        knowledges = [
+            await knowledge.to_dto(get_children=False, get_parent=False)
+            for knowledge in all_knowledges
+        ]
 
         return knowledges
 

backend/api/quivr_api/modules/knowledge/tests/test_knowledge_entity.py

@@ -170,7 +170,7 @@ async def test_knowledge_remove_folder_cascade(
     await session.commit()
 
     statement = select(KnowledgeDB)
-    results = (await session.exec(statement)).all()
+    results = (await session.exec(statement)).unique().all()
     assert results == []