fixes memgraph async attirbute error (#3209)

mem0/memory/main.py

@@ -31,7 +31,12 @@ from mem0.memory.utils import (
     process_telemetry_filters,
     remove_code_blocks,
 )
-from mem0.utils.factory import EmbedderFactory, LlmFactory, VectorStoreFactory
+from mem0.utils.factory import (
+    EmbedderFactory,
+    GraphStoreFactory,
+    LlmFactory,
+    VectorStoreFactory,
+)
 
 
 def _build_filters_and_metadata(
@@ -136,14 +141,8 @@ class Memory(MemoryBase):
         self.enable_graph = False
 
         if self.config.graph_store.config:
-            if self.config.graph_store.provider == "memgraph":
+            provider = self.config.graph_store.provider
-                from mem0.memory.memgraph_memory import MemoryGraph
+            self.graph = GraphStoreFactory.create(provider, self.config)
-            elif self.config.graph_store.provider == "neptune":
-                from mem0.graphs.neptune.main import MemoryGraph
-            else:
-                from mem0.memory.graph_memory import MemoryGraph
-
-            self.graph = MemoryGraph(self.config)
             self.enable_graph = True
         else:
             self.graph = None
@@ -989,9 +988,8 @@ class AsyncMemory(MemoryBase):
         self.enable_graph = False
 
         if self.config.graph_store.config:
-            from mem0.memory.graph_memory import MemoryGraph
+            provider = self.config.graph_store.provider
-
+            self.graph = GraphStoreFactory.create(provider, self.config)
-            self.graph = MemoryGraph(self.config)
             self.enable_graph = True
         else:
             self.graph = None

mem0/utils/factory.py

@@ -106,3 +106,25 @@ class VectorStoreFactory:
     def reset(cls, instance):
         instance.reset()
         return instance
+
+
+class GraphStoreFactory:
+    """
+    Factory for creating MemoryGraph instances for different graph store providers.
+    Usage: GraphStoreFactory.create(provider_name, config)
+    """
+    
+    provider_to_class = {
+        "memgraph": "mem0.memory.memgraph_memory.MemoryGraph",
+        "neptune": "mem0.graphs.neptune.main.MemoryGraph",
+        "default": "mem0.memory.graph_memory.MemoryGraph",
+    }
+
+    @classmethod
+    def create(cls, provider_name, config):
+        class_type = cls.provider_to_class.get(provider_name, cls.provider_to_class["default"])
+        try:
+            GraphClass = load_class(class_type)
+        except (ImportError, AttributeError) as e:
+            raise ImportError(f"Could not import MemoryGraph for provider '{provider_name}': {e}")
+        return GraphClass(config)