Fix m2m listing on historic

2 files changed, 32 insertions, 3 deletions

diff --git a/ishtar_common/models_common.py b/ishtar_common/models_common.py
index dbe5b60a7..0748a57cd 100644
--- a/ishtar_common/models_common.py
+++ b/ishtar_common/models_common.py
@@ -1223,15 +1223,42 @@ class HistoryError(Exception):
 
 class HistoricalRecords(BaseHistoricalRecords):
     def get_extra_fields(self, model, fields):
+        def get_history_m2m(attr):
+            def _get_history_m2m(self):
+                q = model.objects.filter(pk=getattr(self, model._meta.pk.attname))
+                if q.count():
+                    return q.all()[0].history_m2m[attr]
+            return _get_history_m2m
+
+        def get_serialize_call(attr):
+            def _get_serialize_call(self):
+                q = model.objects.filter(pk=getattr(self, model._meta.pk.attname))
+                if q.count():
+                    return getattr(q.all()[0], attr)()
+            return _get_serialize_call
+
+        def get_serialize_properties(attr):
+            def _get_serialize_properties(self):
+                q = model.objects.filter(pk=getattr(self, model._meta.pk.attname))
+                if q.count():
+                    return getattr(q.all()[0], attr)
+            return _get_serialize_properties
+
         extra_fields = super().get_extra_fields(model, fields)
         # initialize default empty fields
-        attrs = ["HISTORICAL_M2M", "SERIALIZE_CALL", "SERIALIZE_PROPERTIES"]
         fields = [f.name for f in model._meta.fields]
         lst = ["documents"]
-        for attr in attrs:
-            lst += [k for k in getattr(model, attr, []) if k not in fields]
         for key in lst:
             extra_fields[key] = ""
+        for k in getattr(model, "SERIALIZE_PROPERTIES", []):
+            if k not in fields:
+                extra_fields[k] = get_serialize_properties(k)
+        for k in getattr(model, "SERIALIZE_CALL", []):
+            if k not in fields:
+                extra_fields[k] = get_serialize_call(k)
+        for k in getattr(model, "HISTORICAL_M2M", []):
+            if k not in fields:
+                extra_fields[k] = get_history_m2m(k)
         return extra_fields
 
     def _save_historic(
diff --git a/ishtar_common/templatetags/window_field.py b/ishtar_common/templatetags/window_field.py
index 70a2ba4da..30cdab95d 100644
--- a/ishtar_common/templatetags/window_field.py
+++ b/ishtar_common/templatetags/window_field.py
@@ -211,6 +211,8 @@ def field_flex_detail_multiple_full(context, caption, items):
 
 @register.filter
 def m2m_listing(item, key):
+    if hasattr(item, "m2m_listing_" + key):
+        return getattr(item, "m2m_listing_" + key)()
     if isinstance(item, dict):
         if key in item:
             return item[key]