collection version references view

core/collections/urls.py

@@ -67,6 +67,11 @@
         ),
         include('core.mappings.urls')
     ),
+    re_path(
+        r'^(?P<collection>{pattern})/(?P<version>{pattern})/references/$'.format(pattern=NAMESPACE_PATTERN),
+        views.CollectionVersionReferencesView.as_view(),
+        name='collectionversion-references'
+    ),
     re_path(
         r'^(?P<collection>{pattern})/(?P<version>{pattern})/processing/$'.format(pattern=NAMESPACE_PATTERN),
         views.CollectionVersionProcessingView.as_view(),

core/collections/views.py

@@ -326,6 +326,19 @@ def get_version_information_of_related_mappings(instance, related_mappings):
         )
 
 
+class CollectionVersionReferencesView(CollectionVersionBaseView, ListWithHeadersMixin):
+    serializer_class = CollectionReferenceSerializer
+
+    def get(self, request, *args, **kwargs):
+        query_params = self.request.query_params
+        search_query = query_params.get('q', '')
+        sort = query_params.get('search_sort', 'ASC')
+        object_version = self.get_queryset().first().head
+        references = object_version.references.filter(expression__icontains=search_query)
+        self.object_list = references if sort == 'ASC' else list(reversed(references))
+        return self.list(request, *args, **kwargs)
+
+
 class CollectionVersionListView(CollectionVersionBaseView, mixins.CreateModelMixin, ListWithHeadersMixin):
     released_filter = None
     processing_filter = None