Treatments: better management of merge - tests

1 files changed, 9 insertions, 1 deletions

diff --git a/archaeological_finds/models_finds.py b/archaeological_finds/models_finds.py
index a3aaae50d..9baced4e0 100644
--- a/archaeological_finds/models_finds.py
+++ b/archaeological_finds/models_finds.py
@@ -1376,12 +1376,20 @@ class Find(BulkUpdatedItem, ValueGetter, BaseHistorizedItem, OwnPerms,
         for field in m2m:
             if field == 'datings' and copy_datings:
                 for dating in self.datings.all():
+                    is_present = False
+                    for current_dating in new.datings.all():
+                        if Dating.is_identical(current_dating, dating):
+                            is_present = True
+                            break
+                    if is_present:
+                        continue
                     dating.pk = None
                     dating.save()
                     new.datings.add(dating)
             else:
                 for val in getattr(self, field).all():
-                    getattr(new, field).add(val)
+                    if val not in getattr(new, field).all():
+                        getattr(new, field).add(val)
         return new
 
     @classmethod