feat: Use unwind for batch edge save and add unit tests for get_graph_from_model

* feat: adds some unit tests for get_graph_from_model

* feat: updates neo4j add_edges cypher and deletes shallow get_graph_from_model

* fix: fixing merge conflict false resolve

* chore: deletes old only_root unit test

cognee/api/v1/cognify/cognify_v2.py

@@ -164,7 +164,7 @@ async def get_default_tasks(
                 summarization_model=cognee_config.summarization_model,
                 task_config={"batch_size": 10},
             ),
-            Task(add_data_points, only_root=True, task_config={"batch_size": 10}),
+            Task(add_data_points, task_config={"batch_size": 10}),
             Task(store_descriptive_metrics),
         ]
     except Exception as error:

cognee/infrastructure/databases/graph/neo4j_driver/adapter.py

@@ -205,12 +205,20 @@ class Neo4jAdapter(GraphDBInterface):
 
     async def add_edges(self, edges: list[tuple[str, str, str, dict[str, Any]]]) -> None:
         query = """
-        UNWIND $edges AS edge
-        MATCH (from_node {id: edge.from_node})
-        MATCH (to_node {id: edge.to_node})
-        CALL apoc.create.relationship(from_node, edge.relationship_name, edge.properties, to_node) YIELD rel
-        RETURN rel
-        """
+            UNWIND $edges AS edge
+            MATCH (from_node {id: edge.from_node})
+            MATCH (to_node {id: edge.to_node})
+            CALL apoc.merge.relationship(
+                from_node,
+                edge.relationship_name,
+                {
+                    source_node_id: edge.from_node,
+                    target_node_id: edge.to_node
+                },
+                edge.properties,
+                to_node
+            ) YIELD rel
+            RETURN rel"""
 
         edges = [
             {

cognee/modules/graph/utils/get_graph_from_model.py

@@ -8,7 +8,6 @@ async def get_graph_from_model(
     added_nodes: dict,
     added_edges: dict,
     visited_properties: dict = None,
-    only_root=False,
     include_root=True,
 ):
     if str(data_point.id) in added_nodes:
@@ -98,7 +97,7 @@ async def get_graph_from_model(
             )
             added_edges[str(edge_key)] = True
 
-        if str(field_value.id) in added_nodes or only_root:
+        if str(field_value.id) in added_nodes:
             continue
 
         property_nodes, property_edges = await get_graph_from_model(

cognee/tasks/storage/add_data_points.py

@@ -5,7 +5,7 @@ from cognee.modules.graph.utils import deduplicate_nodes_and_edges, get_graph_fr
 from .index_data_points import index_data_points
 
 
-async def add_data_points(data_points: list[DataPoint], only_root=False):
+async def add_data_points(data_points: list[DataPoint]):
     nodes = []
     edges = []
 
@@ -20,7 +20,6 @@ async def add_data_points(data_points: list[DataPoint], only_root=False):
                 added_nodes=added_nodes,
                 added_edges=added_edges,
                 visited_properties=visited_properties,
-                only_root=only_root,
             )
             for data_point in data_points
         ]

cognee/tests/unit/interfaces/graph/get_graph_from_model_unit_tests.py

@@ -0,0 +1,120 @@
+import pytest
+import asyncio
+import random
+from typing import List
+from uuid import NAMESPACE_OID, uuid5
+from uuid import uuid4
+
+from IPython.utils.wildcard import is_type
+
+from cognee.infrastructure.engine import DataPoint
+from cognee.modules.engine.models.Entity import Entity, EntityType
+from cognee.modules.chunking.models.DocumentChunk import DocumentChunk
+from cognee.modules.data.processing.document_types import Document
+from cognee.modules.graph.utils import get_graph_from_model
+
+
+@pytest.mark.asyncio
+async def test_get_graph_from_model_basic_initialization():
+    """Test the basic behavior of get_graph_from_model with a simple data point - without connection."""
+    data_point = DataPoint(id=uuid4(), attributes={"name": "Node1"})
+    added_nodes = {}
+    added_edges = {}
+    visited_properties = {}
+
+    nodes, edges = await get_graph_from_model(
+        data_point, added_nodes, added_edges, visited_properties
+    )
+
+    assert len(nodes) == 1
+    assert len(edges) == 0
+    assert str(data_point.id) in added_nodes
+
+
+@pytest.mark.asyncio
+async def test_get_graph_from_model_with_single_neighbor():
+    """Test the behavior of get_graph_from_model when a data point has a single DataPoint property."""
+    type_node = EntityType(
+        id=uuid4(),
+        name="Vehicle",
+        description="This is a Vehicle node",
+    )
+
+    entity_node = Entity(
+        id=uuid4(),
+        name="Car",
+        is_a=type_node,
+        description="This is a car node",
+    )
+    added_nodes = {}
+    added_edges = {}
+    visited_properties = {}
+
+    nodes, edges = await get_graph_from_model(
+        entity_node, added_nodes, added_edges, visited_properties
+    )
+
+    assert len(nodes) == 2
+    assert len(edges) == 1
+    assert str(entity_node.id) in added_nodes
+    assert str(type_node.id) in added_nodes
+    assert (str(entity_node.id) + str(type_node.id) + "is_a") in added_edges
+
+
+@pytest.mark.asyncio
+async def test_get_graph_from_model_with_multiple_nested_connections():
+    """Test the behavior of get_graph_from_model when a data point has multiple nested DataPoint property."""
+    type_node = EntityType(
+        id=uuid4(),
+        name="Transportation tool",
+        description="This is a Vehicle node",
+    )
+
+    entity_node_1 = Entity(
+        id=uuid4(),
+        name="Car",
+        is_a=type_node,
+        description="This is a car node",
+    )
+
+    entity_node_2 = Entity(
+        id=uuid4(),
+        name="Bus",
+        is_a=type_node,
+        description="This is a bus node",
+    )
+
+    document = Document(
+        name="main_document", raw_data_location="home/", metadata_id=uuid4(), mime_type="test"
+    )
+
+    chunk = DocumentChunk(
+        id=uuid4(),
+        word_count=8,
+        chunk_index=0,
+        cut_type="test",
+        text="The car and the bus are transportation tools",
+        is_part_of=document,
+        contains=[entity_node_1, entity_node_2],
+    )
+
+    added_nodes = {}
+    added_edges = {}
+    visited_properties = {}
+
+    nodes, edges = await get_graph_from_model(chunk, added_nodes, added_edges, visited_properties)
+
+    assert len(nodes) == 5
+    assert len(edges) == 5
+
+    assert str(entity_node_1.id) in added_nodes
+    assert str(entity_node_2.id) in added_nodes
+    assert str(type_node.id) in added_nodes
+    assert str(document.id) in added_nodes
+    assert str(chunk.id) in added_nodes
+
+    assert (str(entity_node_1.id) + str(type_node.id) + "is_a") in added_edges
+    assert (str(entity_node_2.id) + str(type_node.id) + "is_a") in added_edges
+    assert (str(chunk.id) + str(document.id) + "is_part_of") in added_edges
+    assert (str(chunk.id) + str(entity_node_1.id) + "contains") in added_edges
+    assert (str(chunk.id) + str(entity_node_2.id) + "contains") in added_edges