OpenConceptLab/ocl_issues#1151 | mapping importer | fixing exist chec…

…k criteria

core/importers/models.py

@@ -14,7 +14,7 @@
 from core.common.constants import HEAD
 from core.common.services import RedisService
 from core.common.tasks import bulk_import_parts_inline, delete_organization
-from core.common.utils import drop_version, is_url_encoded_string, encode_string
+from core.common.utils import drop_version, is_url_encoded_string, encode_string, to_parent_uri
 from core.concepts.models import Concept
 from core.mappings.models import Mapping
 from core.orgs.models import Organization
@@ -473,14 +473,18 @@ def get_queryset(self):
                 filters['to_concept__versioned_object_id'] = to_concept.versioned_object_id
             else:
                 filters['to_concept_code'] = compact(versionless_to_concept_url.split('/'))[-1]
+                if not to_source_url:
+                    filters['to_source__uri'] = to_parent_uri(versionless_to_concept_url)
 
         if self.get('id'):
             filters['mnemonic'] = self.get('id')
 
-        if to_concept_code and to_source_url:
-            filters['to_concept_code'] = to_concept_code
+        if to_source_url:
             filters['to_source__uri'] = drop_version(to_source_url)
 
+        if to_concept_code:
+            filters['to_concept_code'] = to_concept_code
+
         self.queryset = Mapping.objects.filter(**filters)
 
         return self.queryset