fix: update_script rewrite metadata

backend/tests/test_scripts.py

@@ -343,6 +343,8 @@ def test_scripts_model_allows_duplicate_current_object_id() -> None:
 
 
 def _script_row() -> Scripts:
+    from datetime import UTC, datetime
+
     return Scripts(
         script_id="01SCR0000000000000000000A",
         workspace_id="01WS0000000000000000000A",
@@ -352,6 +354,8 @@ def _script_row() -> Scripts:
         script_type="notebook",
         visibility="private",
         status="active",
+        created_at=datetime.now(UTC).replace(tzinfo=None),
+        updated_at=datetime.now(UTC).replace(tzinfo=None),
     )
 
 
@@ -516,3 +520,147 @@ async def test_jupyter_check_notebook_lock_ignores_deleted_scripts() -> None:
     statement = call[0][0]
     compiled = str(statement.compile(compile_kwargs={"literal_binds": True}))
     assert "is_deleted" in compiled
+
+
+@pytest.mark.asyncio
+async def test_update_script_writes_back_storage_object_metadata(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """update_script must persist the new content_hash/size_bytes/relative_path
+    onto the StorageObjects row (not just into the response dict). Pre-fix the
+    DB row kept the create-time values forever, so cache/dedup/hash checks
+    downstream saw stale data.
+
+    Also locks in the workspace-prefixed relative_path convention so the
+    frontend's slice(2) reducer produces a non-empty path even for root scripts.
+    """
+    import hashlib
+
+    from backend.schemas import UpdateScriptRequest
+    from backend.scripts import update_script
+
+    script = _script_row()
+    storage_object = _storage_object_row()
+    # Seed stale metadata as it would have looked after create_script_record.
+    user_id = "01USR0000000000000000000A"
+    storage_object.object_key = f"{script.workspace_id}/{user_id}/test.ipynb"
+    storage_object.content_hash = hashlib.sha256(b"old").hexdigest()
+    storage_object.size_bytes = 3
+    storage_object.relative_path = f"workspace/{user_id}/test.ipynb"
+
+    request = _make_request()
+    runtime_client = request.app.state.runtime_client
+    runtime_client.upload_file = AsyncMock(return_value={"name": "test.ipynb"})
+    runtime_client.create_notebook = AsyncMock(return_value={"name": "test.ipynb"})
+    context = _make_context()
+    session = AsyncMock()
+    session.flush = AsyncMock()
+    session.refresh = AsyncMock()
+
+    async def _fake_get_script_row(
+        _script_id: str,
+        _context: SimpleNamespace,
+        _session: AsyncMock,
+        *,
+        for_update: bool = False,
+        allow_missing_storage_object: bool = False,
+    ) -> tuple[Scripts, StorageObjects]:
+        return script, storage_object
+
+    monkeypatch.setattr("backend.scripts.get_script_row", _fake_get_script_row)
+
+    new_content = '{"cells": [{"cell_type": "code", "source": ["print(1)"]}]}\n'
+    payload = UpdateScriptRequest(content=new_content)
+
+    result = await update_script(
+        script_id=script.script_id,
+        payload=payload,
+        request=request,
+        context=context,
+        session=session,
+    )
+
+    expected_hash = hashlib.sha256(new_content.encode("utf-8")).hexdigest()
+    expected_size = len(new_content.encode("utf-8"))
+
+    # DB row carries the new metadata.
+    assert storage_object.content_hash == expected_hash
+    assert storage_object.size_bytes == expected_size
+    assert storage_object.relative_path == f"workspace/{user_id}/test.ipynb"
+
+    # Response echoes the same values.
+    data = result["data"]
+    assert data["content_hash"] == expected_hash
+    assert data["size_bytes"] == expected_size
+    assert data["relative_path"] == f"workspace/{user_id}/test.ipynb"
+
+    # session.flush + refresh were called to push the new metadata to DB.
+    session.flush.assert_awaited_once()
+    session.refresh.assert_awaited_once_with(storage_object)
+    # The runtime client received the create_notebook for the Jupyter path
+    # (script_type='notebook' goes through create_notebook, not upload_file).
+    runtime_client.create_notebook.assert_awaited_once()
+
+
+@pytest.mark.asyncio
+async def test_update_script_jupyter_only_uses_dict_fallback(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """When a script has no StorageObjects row (jupyter-only fallback path),
+    update_script must still return the workspace-prefixed relative_path
+    so the frontend's slice(2) reducer yields the basename — not an empty
+    string. No DB write should be attempted when there is no row to update.
+    """
+    import hashlib
+
+    from backend.schemas import UpdateScriptRequest
+    from backend.scripts import update_script
+
+    script = _script_row()
+    user_id = "01USR0000000000000000000A"
+
+    request = _make_request()
+    runtime_client = request.app.state.runtime_client
+    runtime_client.upload_file = AsyncMock(return_value={"name": "test.ipynb"})
+    runtime_client.create_notebook = AsyncMock(return_value={"name": "test.ipynb"})
+    context = _make_context()
+    session = AsyncMock()
+    session.flush = AsyncMock()
+    session.refresh = AsyncMock()
+
+    async def _fake_get_script_row(
+        _script_id: str,
+        _context: SimpleNamespace,
+        _session: AsyncMock,
+        *,
+        for_update: bool = False,
+        allow_missing_storage_object: bool = False,
+    ) -> tuple[Scripts, None]:
+        return script, None
+
+    monkeypatch.setattr("backend.scripts.get_script_row", _fake_get_script_row)
+
+    payload = UpdateScriptRequest(content='{"cells": []}\n')
+    result = await update_script(
+        script_id=script.script_id,
+        payload=payload,
+        request=request,
+        context=context,
+        session=session,
+    )
+
+    expected_hash = hashlib.sha256(b'{"cells": []}\n').hexdigest()
+
+    data = result["data"]
+    # Jupyter-only fallback derives jupyter_path from the script_id via
+    # _jupyter_path(), which appends ".ipynb". The contract we lock in is
+    # "always workspace-prefixed, never bare user_id/basename" so the
+    # frontend's slice(2) reducer is safe.
+    assert data["relative_path"] == f"workspace/{script.script_id}.ipynb"
+    assert data["relative_path"].startswith("workspace/")
+    assert data["content_hash"] == expected_hash
+    assert data["size_bytes"] == len(b'{"cells": []}\n')
+
+    # No DB write should be attempted when there is no StorageObjects row.
+    session.flush.assert_not_awaited()
+    session.refresh.assert_not_awaited()