Manage error when saving record from Many2One

The save of the current record must be done at the same level as the
validation.

issue2614
review393001
(transplanted from d284eb9d3405d49c09eb5e59d2bac4ce9b4b27bc)

tryton/gui/window/view_form/view/form_gtk/many2one.py

@@ -177,13 +177,13 @@ class Many2One(WidgetInterface):
         screen = self.get_screen()
 
         def callback(result):
-            if result and screen.save_current():
+            if result:
                 self.field.set_client(self.record,
                     self.value_from_id(screen.current_record.id,
                         screen.current_record.rec_name()))
                 self.display(self.record, self.field)
             self.focus_out = True
-        WinForm(screen, callback, new=True)
+        WinForm(screen, callback, new=True, save_current=True)
 
     def sig_edit(self, widget):
         if not self.focus_out or not self.field:
@@ -198,18 +198,15 @@ class Many2One(WidgetInterface):
             screen.load([self.id_from_value(self.field.get(self.record))])
 
             def callback(result):
-                if result and screen.save_current():
+                if result:
                     self.field.set_client(self.record,
                         self.value_from_id(screen.current_record.id,
                             screen.current_record.rec_name()),
                         force_change=True)
-                elif result:
-                    screen.display()
-                    return WinForm(screen, callback)
                 self.focus_out = True
                 self.display(self.record, self.field)
                 self.changed = True
-            WinForm(screen, callback)
+            WinForm(screen, callback, save_current=True)
             return
         elif model and not self._readonly:
             domain = self.field.domain_get(self.record)

tryton/gui/window/view_form/view/list_gtk/parser.py

@@ -627,20 +627,17 @@ class M2O(Char):
             mode=['form'])
 
         def open_callback(result):
-            if result and screen.save_current():
+            if result:
                 value = (screen.current_record.id,
                     screen.current_record.rec_name())
                 field.set_client(record, value, force_change=True)
-            elif result:
-                screen.display()
-                return WinForm(screen, open_callback)
             if callback:
                 callback()
         if obj_id:
             screen.load([obj_id])
-            WinForm(screen, open_callback)
+            WinForm(screen, open_callback, save_current=True)
         else:
-            WinForm(screen, open_callback, new=True)
+            WinForm(screen, open_callback, new=True, save_current=True)
 
     def search_remote(self, record, relation, ids=None, domain=None,
             context=None, callback=None):

tryton/gui/window/win_form.py

@@ -16,12 +16,14 @@ class WinForm(NoModal):
     "Form window"
 
     def __init__(self, screen, callback, view_type='form',
-            new=False, many=False, domain=None, context=None):
+            new=False, many=False, domain=None, context=None,
+            save_current=False):
         NoModal.__init__(self)
         self.screen = screen
         self.callback = callback
         self.domain = domain
         self.context = context
+        self.save_current = save_current
         self.prev_view = self.screen.current_view
         self.screen.screen_container.alternate_view = True
         switch_new = False
@@ -366,6 +368,9 @@ class WinForm(NoModal):
                 and self.screen.current_record is not None):
             validate = self.screen.current_record.validate(
                 self.screen.current_view.get_fields())
+            if validate and self.save_current:
+                if not self.screen.save_current():
+                    validate = False
             if not validate:
                 self.screen.set_cursor()
                 self.screen.display()