Allow to pass parent_context when calling get_context

issue7697
review56381002

tryton/gui/window/view_form/model/field.py

@@ -60,8 +60,11 @@ class Field(object):
     def validation_domains(self, record, pre_validate=None):
         return concat(*self.domains_get(record, pre_validate))
 
-    def get_context(self, record):
-        context = record.get_context()
+    def get_context(self, record, record_context=None):
+        if record_context is not None:
+            context = record_context.copy()
+        else:
+            context = record.get_context()
         context.update(record.expr_eval(self.attrs.get('context', {})))
         return context
 
@@ -439,8 +442,8 @@ class M2OField(Field):
         record.value[self.name + '.rec_name'] = rec_name
         record.value[self.name] = value
 
-    def get_context(self, record):
-        context = super(M2OField, self).get_context(record)
+    def get_context(self, record, record_context=None):
+        context = super(M2OField, self).get_context(record, record_context)
         if self.attrs.get('datetime_field'):
             context['_datetime'] = record.get_eval(
                 )[self.attrs.get('datetime_field')]
@@ -858,8 +861,9 @@ class ReferenceField(Field):
         record.value[self.name] = ref_model, ref_id
         record.value[self.name + '.rec_name'] = rec_name
 
-    def get_context(self, record):
-        context = super(ReferenceField, self).get_context(record)
+    def get_context(self, record, record_context=None):
+        context = super(ReferenceField, self).get_context(
+            record, record_context)
         if self.attrs.get('datetime_field'):
             context['_datetime'] = record.get_eval(
                 )[self.attrs.get('datetime_field')]

tryton/gui/window/view_form/model/group.py

@@ -256,10 +256,11 @@ class Group(SignalEvent, list):
     def context(self):
         ctx = rpc.CONTEXT.copy()
         if self.parent:
-            ctx.update(self.parent.get_context())
+            parent_context = self.parent.get_context()
+            ctx.update(parent_context)
             if self.child_name in self.parent.group.fields:
                 field = self.parent.group.fields[self.child_name]
-                ctx.update(field.get_context(self.parent))
+                ctx.update(field.get_context(self.parent, parent_context))
         ctx.update(self._context)
         if self.parent_datetime_field:
             ctx['_datetime'] = self.parent.get_eval(