Add condition filters to CaseFilter for enhanced search capabilities

atlas/filters.py

@@ -109,6 +109,12 @@ class CaseFilter(django_filters.FilterSet):
     # Free-text search to help find the correct examination when there are
     # many similarly-named Series/Examination entries.
     examination_text = django_filters.CharFilter(method='filter_examination_text', label='Examination (text)')
+    # Full list of conditions and a text search to find conditions
+    condition = django_filters.ModelMultipleChoiceFilter(
+        queryset=Condition.objects.all(),
+        label='Condition',
+    )
+    condition_text = django_filters.CharFilter(method='filter_condition_text', label='Condition (text)')
     differential_case = django_filters.ModelMultipleChoiceFilter(
         label="Differential",
         field_name="differentialcase__condition",
@@ -173,6 +179,28 @@ class CaseFilter(django_filters.FilterSet):
 
         return queryset.filter(series__examination__in=matches).distinct()
 
+    def filter_condition_text(self, queryset, name, value):
+        """Filter Cases by a text search on related Condition records.
+
+        Matches both direct `condition` M2M and `differential` entries.
+        """
+        if not value:
+            return queryset
+
+        # Only try PK match when numeric
+        try:
+            pk_val = int(value)
+        except Exception:
+            pk_val = None
+
+        if pk_val is not None:
+            matches = Condition.objects.filter(Q(name__icontains=value) | Q(pk=pk_val)).distinct()
+        else:
+            matches = Condition.objects.filter(Q(name__icontains=value)).distinct()
+
+        # Match either direct condition M2M or differential (through Differential)
+        return queryset.filter(Q(condition__in=matches) | Q(differential__in=matches)).distinct()
+
 
 class SeriesFilter(django_filters.FilterSet):
     case = django_filters.ModelMultipleChoiceFilter(