1 files changed, 24 insertions, 19 deletions
diff --git a/archaeological_context_records/models.py b/archaeological_context_records/models.py
index 5ba631dba..030f817d9 100644
--- a/archaeological_context_records/models.py
+++ b/archaeological_context_records/models.py
@@ -29,7 +29,7 @@ from django.utils.translation import ugettext_lazy as _, pgettext, \
     activate, pgettext_lazy, deactivate
 from django.utils.text import slugify
 
-from ishtar_common.utils import cached_label_changed
+from ishtar_common.utils import cached_label_changed, HISTORY_M2M_SPLIT
 
 from ishtar_common.models import Document, GeneralType, \
     BaseHistorizedItem, HistoricalRecords, OwnPerms, ShortMenuItem, \
@@ -104,25 +104,30 @@ class Dating(models.Model):
         return self.SEP.join(values)
 
     @classmethod
-    def history_decompress(cls, value):
-        if not value:
-            value = ""
-        res = {}
-        for idx, val in enumerate(value.split(cls.SEP)):
-            key = cls.HISTORY_ATTR[idx]
-            if val == '':
-                val = None
-            elif key in ("period", "dating_type", "quality"):
-                field = cls._meta.get_field(key)
-                q = field.related_model.objects.filter(txt_idx=val)
-                if q.count():
-                    val = q.all()[0]
-                else:  # do not exist anymore in db
+    def history_decompress(cls, full_value, create=False):
+        if not full_value:
+            return []
+        full_res = []
+        for value in full_value.split(HISTORY_M2M_SPLIT):
+            res = {}
+            for idx, val in enumerate(value.split(cls.SEP)):
+                key = cls.HISTORY_ATTR[idx]
+                if val == '':
                     val = None
-            elif key in ("start_date", "end_date"):
-                val = int(val)
-            res[key] = val
-        return res
+                elif key in ("period", "dating_type", "quality"):
+                    field = cls._meta.get_field(key)
+                    q = field.related_model.objects.filter(txt_idx=val)
+                    if q.count():
+                        val = q.all()[0]
+                    else:  # do not exist anymore in db
+                        val = None
+                elif key in ("start_date", "end_date"):
+                    val = int(val)
+                res[key] = val
+            if create:
+                res = cls.objects.create(**res)
+            full_res.append(res)
+        return full_res
 
     @classmethod
     def is_identical(cls, dating_1, dating_2):