Generic manner of managing external id

1 files changed, 41 insertions, 35 deletions

diff --git a/ishtar_common/models.py b/ishtar_common/models.py
index 55795c91e..b0b050c6c 100644
--- a/ishtar_common/models.py
+++ b/ishtar_common/models.py
@@ -175,35 +175,6 @@ class ValueGetter(object):
         return values
 
 
-class ExternalIdManager(object):
-    EXTERNAL_ID_KEY = ''
-    EXTERNAL_ID_DEPENDENCIES = []
-
-    def update_external_id(self, save=True):
-        if not self.EXTERNAL_ID_KEY:
-            raise NotImplementedError(
-                "{} should have an EXTERNAL_ID_KEY".format(self.__class__))
-        if self.external_id and not self.auto_external_id:
-            return
-        external_id = get_external_id(self.EXTERNAL_ID_KEY, self)
-        if external_id == self.external_id:
-            return
-        self.auto_external_id = True
-        self.external_id = external_id
-        if save:
-            self.skip_history_when_saving = True
-            self.save()
-        for dep in self.EXTERNAL_ID_DEPENDENCIES:
-            for obj in getattr(self, dep).all():
-                obj.update_external_id()
-        return external_id
-
-    def save(self, *args, **kwargs):
-        returned = super(ExternalIdManager, self).save(*args, **kwargs)
-        self.update_external_id()
-        return returned
-
-
 class HistoricalRecords(BaseHistoricalRecords):
     def create_historical_record(self, instance, type):
         try:
@@ -931,7 +902,12 @@ class Imported(models.Model):
 
 
 class BaseHistorizedItem(Imported):
+    """
+    Historized item with external ID management
+    """
     IS_BASKET = False
+    EXTERNAL_ID_KEY = ''
+    EXTERNAL_ID_DEPENDENCIES = []
     history_modifier = models.ForeignKey(
         User, related_name='+', on_delete=models.SET_NULL,
         verbose_name=_(u"Last editor"), blank=True, null=True)
@@ -942,12 +918,20 @@ class BaseHistorizedItem(Imported):
     class Meta:
         abstract = True
 
-    def save(self, *args, **kwargs):
-        assert hasattr(self, 'history_modifier')
-        if not self.id:
-            self.history_creator = self.history_modifier
-        super(BaseHistorizedItem, self).save(*args, **kwargs)
-        return True
+    def update_external_id(self, save=False):
+        if not self.EXTERNAL_ID_KEY or (
+                self.external_id and not self.auto_external_id):
+            return
+        external_id = get_external_id(self.EXTERNAL_ID_KEY, self)
+        if external_id == self.external_id:
+            return
+        self.auto_external_id = True
+        self.external_id = external_id
+        self._cached_label_checked = False
+        if save:
+            self.skip_history_when_saving = True
+            self.save()
+        return external_id
 
     def get_previous(self, step=None, date=None, strict=True):
         """
@@ -1077,6 +1061,28 @@ class BaseHistorizedItem(Imported):
             items.append('00000000')
         return u"-".join([unicode(item) for item in items])
 
+    def save(self, *args, **kwargs):
+        created = not self.pk
+        if not getattr(self, 'skip_history_when_saving', False):
+            assert hasattr(self, 'history_modifier')
+            if created:
+                self.history_creator = self.history_modifier
+        # external ID can have related item not available before save
+        external_id_updated = kwargs.pop('external_id_updated') \
+            if 'external_id_updated' in kwargs else False
+        if not created and not external_id_updated:
+            self.update_external_id()
+        super(BaseHistorizedItem, self).save(*args, **kwargs)
+        if created and self.update_external_id():
+            # force resave for external ID creation
+            self.skip_history_when_saving = True
+            self._updated_id = True
+            return self.save(external_id_updated=True)
+        for dep in self.EXTERNAL_ID_DEPENDENCIES:
+            for obj in getattr(self, dep).all():
+                obj.update_external_id(save=True)
+        return True
+
 
 class GeneralRelationType(GeneralType):
     order = models.IntegerField(_(u"Order"), default=1)