Add specs for Neo4jRelationship to Python SDK. (#288)

Author: badmonster0

python/cocoindex/storages.py

@@ -1,8 +1,32 @@
 """All builtin storages."""
-from . import op
+from dataclasses import dataclass
 
+from . import op
+from .auth_registry import AuthEntryReference
 class Postgres(op.StorageSpec):
     """Storage powered by Postgres and pgvector."""
 
     database_url: str | None = None
     table_name: str | None = None
+
+@dataclass
+class Neo4jConnectionSpec:
+    """Connection spec for Neo4j."""
+    uri: str
+    user: str
+    password: str
+    db: str | None = None
+
+@dataclass
+class Neo4jNodeSpec:
+    """Spec for a Neo4j node type."""
+    field_name: str
+    label: str
+
+class Neo4jRelationship(op.StorageSpec):
+    """Graph storage powered by Neo4j."""
+
+    connection: AuthEntryReference
+    relationship: str
+    source_node: Neo4jNodeSpec
+    target_node: Neo4jNodeSpec

src/ops/storages/neo4j.rs

@@ -663,7 +663,7 @@ impl StorageFactoryBase for RelationshipFactory {
     type Key = GraphRelationship;
 
     fn name(&self) -> &str {
-        "Neo4j"
+        "Neo4jRelationship"
     }
 
     fn build(