fix: retro of result_coordinate_system for DPF < 251.1.pre1 (#2555)

Co-authored-by: PyAnsys CI Bot <[email protected]>

Author: PProfizi

src/ansys/dpf/core/operators/build.py

@@ -23,6 +23,7 @@
     "NMISC": "mapdl::nmisc",
     "SMISC": "mapdl::smisc",
     "result_provider": "custom",
+    "CS": "mapdl::rst::CS",
 }
 
 def build_docstring(specification_description):

src/ansys/dpf/core/operators/operator.mustache

@@ -93,7 +93,7 @@ class {{class_name}}(Operator):
         try:
             super().__init__(name="{{operator_name}}", config=config, server=server)
         except (KeyError, errors.DPFServerException) as e:
-            if "doesn't exist in the registry" in str(e):
+            if "doesn't exist" in str(e):
                 super().__init__(name="{{internal_name_alias}}", config=config, server=server)
             else:
                 raise e

src/ansys/dpf/core/operators/result/coordinate_system.py

@@ -7,6 +7,7 @@
 from __future__ import annotations
 
 from warnings import warn
+from ansys.dpf.core.core import errors
 from ansys.dpf.core.dpf_operator import Operator
 from ansys.dpf.core.inputs import Input, _Inputs
 from ansys.dpf.core.outputs import Output, _Outputs
@@ -64,7 +65,13 @@ def __init__(
         config=None,
         server=None,
     ):
-        super().__init__(name="CS", config=config, server=server)
+        try:
+            super().__init__(name="CS", config=config, server=server)
+        except (KeyError, errors.DPFServerException) as e:
+            if "doesn't exist" in str(e):
+                super().__init__(name="mapdl::rst::CS", config=config, server=server)
+            else:
+                raise e
         self._inputs = InputsCoordinateSystem(self)
         self._outputs = OutputsCoordinateSystem(self)
         if cs_id is not None:

tests/operators/test_coordinate_system.py

@@ -30,13 +30,8 @@
 
 def test_operator_coordinate_system_rst(server_type):
     model = dpf.Model(examples.download_hemisphere(server=server_type), server=server_type)
-    if conftest.SERVERS_VERSION_GREATER_THAN_OR_EQUAL_TO_9_1:
-        # Starting with DPF 2025.1.pre1
-        cs = dpf.operators.result.coordinate_system(server=server_type)
-        cs.inputs.data_sources.connect(model)
-    else:
-        # For previous DPF versions
-        cs = model.operator(r"mapdl::rst::CS")
+    cs = dpf.operators.result.coordinate_system(server=server_type)
+    cs.inputs.data_sources.connect(model)
     cs.inputs.cs_id.connect(12)
     cs_rot_mat = cs.outputs.field().data
     ref = np.array(