feat: skip migration of linked filters based on computed attributes

src/gooddata_legacy2cloud/dashboards/filter_context.py

@@ -1,4 +1,6 @@
 # (C) 2026 GoodData Corporation
+import logging
+
 from gooddata_legacy2cloud.dashboards.data_classes import DashboardContext
 from gooddata_legacy2cloud.helpers import get_cloud_id
 from gooddata_legacy2cloud.metrics.attribute_element import AttributeElement
@@ -8,6 +10,8 @@
     FilterContextWrapper,
 )
 
+logger = logging.getLogger("migration")
+
 # TODO: refactor FilterContext class to reuse the pydantic mode.
 #   - [ ] Phase 1: class typed internally, get() dumps before return
 #   - [ ] Phase 2: get() returns typed object, consumers handle it
@@ -60,14 +64,25 @@ def _get_filter_elements_by(self, filter: dict) -> list:
                 new_attr = self.ctx.ldm_mappings.search_mapping_identifier(
                     obj["attribute"]["meta"]["identifier"]
                 )
-                new_attrs.append(
-                    {
-                        "identifier": {
-                            "id": new_attr,
-                            "type": self._transform_attribute_type_value(obj),
+                # NOTE: This is a workaround for a feature gap. There are Legacy cases of linked filters using references
+                # to record counts in a dataset. I distinguish them from regular linked filters by length of displayForms
+                # metadata. This filter setting cannot be migrated to cloud, so we drop it.
+                if (
+                    len(obj["attribute"].get("content", {}).get("displayForms", []))
+                    == 0
+                ):
+                    logger.warning(
+                        "Attribute display form is empty for `%s`. Skipping.", new_attr
+                    )
+                else:
+                    new_attrs.append(
+                        {
+                            "identifier": {
+                                "id": new_attr,
+                                "type": self._transform_attribute_type_value(obj),
+                            }
                         }
-                    }
-                )
+                    )
             if new_attrs:
                 new_filter_elements.append(
                     {

tests/test_filter_context_conversion.py

@@ -9,7 +9,7 @@ def test_get_filter_elements_by_wraps_attributes_as_identifier_refs():
     ctx.legacy_client.get_object.return_value = {
         "attribute": {
             "meta": {"identifier": "attr.region.regionid", "category": "attribute"},
-            "content": {},
+            "content": {"displayForms": ["mock", "values"]},
         }
     }
     ctx.ldm_mappings.search_mapping_identifier.return_value = "region.regionid"