Issue #742 fix legacy save_result/export_workspace usage pattern

Author: soxofaan

CHANGELOG.md

@@ -15,6 +15,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fix legacy usage pattern to append `export_workspace` to `save_result` with generic `process()` helper method ([#742](https://github.com/Open-EO/openeo-python-client/issues/742))
+
 
 ## [0.39.0] - 2025-02-25
 

openeo/rest/stac_resource.py

@@ -36,6 +36,24 @@ class StacResource(_ProcessGraphAbstraction):
     def __init__(self, graph: PGNode, connection: Optional[Connection] = None):
         super().__init__(pgnode=graph, connection=connection)
 
+    def process(
+        self,
+        process_id: str,
+        arguments: Optional[dict] = None,
+        namespace: Optional[str] = None,
+        **kwargs,
+    ) -> StacResource:
+        """
+        Generic helper to create a new StacResource by applying a process.
+
+        :param process_id: process id of the process.
+        :param arguments: argument dictionary for the process.
+        :param namespace: optional: process namespace
+        """
+        pg = self._build_pgnode(process_id=process_id, arguments=arguments, namespace=namespace, **kwargs)
+        # TODO: warn that actual return type can not or is not properly detected
+        return StacResource(graph=pg, connection=self._connection)
+
     @openeo_process
     def export_workspace(self, workspace: str, merge: Union[str, None] = None) -> StacResource:
         """

tests/rest/test_result.py

@@ -0,0 +1,26 @@
+from openeo.rest.datacube import THIS
+from openeo.rest.result import SaveResult
+
+
+def test_legacy_save_result_export_workspace(dummy_backend):
+    """https://github.com/Open-EO/openeo-python-client/issues/742"""
+
+    s2 = dummy_backend.connection.load_collection("S2")
+    saved = s2.save_result(format="GTiff")
+    result = saved.process("export_workspace", arguments={"data": THIS, "workspace": "foobar"})
+    result.download()
+    assert dummy_backend.get_pg() == {
+        "loadcollection1": {
+            "process_id": "load_collection",
+            "arguments": {"id": "S2", "spatial_extent": None, "temporal_extent": None},
+        },
+        "saveresult1": {
+            "process_id": "save_result",
+            "arguments": {"data": {"from_node": "loadcollection1"}, "format": "GTiff", "options": {}},
+        },
+        "exportworkspace1": {
+            "process_id": "export_workspace",
+            "arguments": {"data": {"from_node": "saveresult1"}, "workspace": "foobar"},
+            "result": True,
+        },
+    }