Remove 'objects' literal from schema-addressed storage paths

- Removed hardcoded 'objects' directory level from build_object_path()
- Updated path pattern comment to reflect new structure
- Updated all test expectations to match new path format

Previous path: {schema}/{table}/objects/{key}/{file}
New path: {schema}/{table}/{key}/{file}

The 'objects' literal was a legacy remnant intended for future tabular
storage alongside objects. Removing it simplifies the path structure
and aligns with documented behavior.

Verified:
- All test_object.py tests pass (43 tests)
- All test_npy_codec.py tests pass (22 tests)
- All test_hash_storage.py tests pass (14 tests)

Author: dimitri-yatsenko

src/datajoint/storage.py

@@ -253,13 +253,12 @@ def build_object_path(
             pk_parts.append(f"{attr}={encode_pk_value(value)}")
 
     # Construct full path
-    # Pattern: {partition_attrs}/{schema}/{table}/objects/{remaining_pk}/{filename}
+    # Pattern: {partition_attrs}/{schema}/{table}/{remaining_pk}/{filename}
     parts = []
     if partition_parts:
         parts.extend(partition_parts)
     parts.append(schema)
     parts.append(table)
-    parts.append("objects")
     if pk_parts:
         parts.extend(pk_parts)
     parts.append(filename)

tests/integration/test_object.py

@@ -83,7 +83,6 @@ def test_build_object_path_basic(self):
         )
         assert "myschema" in path
         assert "MyTable" in path
-        assert "objects" in path
         assert "id=123" in path
         assert "data_file_" in path
         assert path.endswith(".dat")
@@ -134,7 +133,7 @@ def test_from_json_string(self):
         """Test creating ObjectRef from JSON string."""
         json_str = json.dumps(
             {
-                "path": "schema/Table/objects/id=1/data_abc123.dat",
+                "path": "schema/Table/id=1/data_abc123.dat",
                 "size": 1024,
                 "hash": None,
                 "ext": ".dat",
@@ -143,7 +142,7 @@ def test_from_json_string(self):
             }
         )
         obj = ObjectRef.from_json(json_str)
-        assert obj.path == "schema/Table/objects/id=1/data_abc123.dat"
+        assert obj.path == "schema/Table/id=1/data_abc123.dat"
         assert obj.size == 1024
         assert obj.hash is None
         assert obj.ext == ".dat"
@@ -152,7 +151,7 @@ def test_from_json_string(self):
     def test_from_json_dict(self):
         """Test creating ObjectRef from dict."""
         data = {
-            "path": "schema/Table/objects/id=1/data_abc123.zarr",
+            "path": "schema/Table/id=1/data_abc123.zarr",
             "size": 5678,
             "hash": None,
             "ext": ".zarr",
@@ -161,23 +160,23 @@ def test_from_json_dict(self):
             "item_count": 42,
         }
         obj = ObjectRef.from_json(data)
-        assert obj.path == "schema/Table/objects/id=1/data_abc123.zarr"
+        assert obj.path == "schema/Table/id=1/data_abc123.zarr"
         assert obj.size == 5678
         assert obj.is_dir is True
         assert obj.item_count == 42
 
     def test_from_json_zarr_style(self):
         """Test creating ObjectRef from Zarr-style JSON with null size."""
         data = {
-            "path": "schema/Recording/objects/id=1/neural_data_abc123.zarr",
+            "path": "schema/Recording/id=1/neural_data_abc123.zarr",
             "size": None,
             "hash": None,
             "ext": ".zarr",
             "is_dir": True,
             "timestamp": "2025-01-15T10:30:00+00:00",
         }
         obj = ObjectRef.from_json(data)
-        assert obj.path == "schema/Recording/objects/id=1/neural_data_abc123.zarr"
+        assert obj.path == "schema/Recording/id=1/neural_data_abc123.zarr"
         assert obj.size is None
         assert obj.hash is None
         assert obj.ext == ".zarr"
@@ -189,15 +188,15 @@ def test_to_json(self):
         from datetime import datetime, timezone
 
         obj = ObjectRef(
-            path="schema/Table/objects/id=1/data.dat",
+            path="schema/Table/id=1/data.dat",
             size=1024,
             hash=None,
             ext=".dat",
             is_dir=False,
             timestamp=datetime(2025, 1, 15, 10, 30, tzinfo=timezone.utc),
         )
         data = obj.to_json()
-        assert data["path"] == "schema/Table/objects/id=1/data.dat"
+        assert data["path"] == "schema/Table/id=1/data.dat"
         assert data["size"] == 1024
         assert data["is_dir"] is False