Merge pull request #268 from collective/dropped_relations

prevent existing relations from being lost

Author: pbauer

CHANGES.rst

@@ -9,6 +9,7 @@ Changelog
   [mamico]
 - Fixed data extraction of Archetypes ATFilefields to concatenate all `Pdata` chunks, when the FileField data was still stored in Filestorage and not not migrated to use blobstorage (using plone.app.blobs).
   [@jnptk]
+- Bugfix to prevent clearing existing relations from catalog when migrating into sites with existing content [ThibautBorn]
 
 1.15 (2025-07-15)
 -----------------

src/collective/exportimport/import_other.py

@@ -359,12 +359,16 @@ def import_relations(self, data):
             all_fixed_relations, key=itemgetter("from_uuid", "from_attribute")
         )
         if HAS_RELAPI:
+            relapi.store_relations()
             relapi.purge_relations()
             relapi.cleanup_intids()
+            relapi.restore_relations()
             relapi.restore_relations(all_relations=all_fixed_relations)
         elif HAS_PLONE6:
+            relationhelper.store_relations()
             relationhelper.purge_relations()
             relationhelper.cleanup_intids()
+            relationhelper.restore_relations()
             relationhelper.restore_relations(all_relations=all_fixed_relations)
 
     def get_from_attribute(self, rel):