Update last commit when try to control possible concurrencies.

The queue need the instance by values.
With the contraints and a control in the iteration mails will be enough.

activity.py

@@ -313,9 +313,18 @@ class Activity(metaclass=PoolMeta):
     def create_activity(cls):
         pool = Pool()
         ElectronicMail = pool.get('electronic.mail')
+        ActivityConfiguration = pool.get('activity.configuration')
+
+        config = ActivityConfiguration(1)
+        pending_mailbox = config.pending_mailbox
+
+        mails = ElectronicMail.search([
+                    ('mailbox', '=', pending_mailbox)
+                    ], order=[('date', 'ASC'), ('id', 'ASC')])
+
 
         with Transaction().set_context(queue_name=QUEUE_NAME):
-            ElectronicMail.__queue__._create_activity()
+            ElectronicMail.__queue__._create_activity(mails)
 
     def get_previous_activity(self):
         ElectronicMail = Pool().get('electronic.mail')

electronic_mail.py

@@ -19,7 +19,7 @@ class ElectronicMail(metaclass=PoolMeta):
     __name__ = 'electronic.mail'
 
     @classmethod
-    def _create_activity(cls):
+    def _create_activity(cls, mails):
         pool = Pool()
         ModelData = pool.get('ir.model.data')
         Activity = pool.get('activity.activity')
@@ -29,19 +29,16 @@ class ElectronicMail(metaclass=PoolMeta):
 
         config = ActivityConfiguration(1)
         employee = config.employee
-        pending_mailbox = config.pending_mailbox
         processed_mailbox = config.processed_mailbox
 
         activity_type = ActivityType(ModelData.get_id('activity',
                 'incoming_email_type'))
 
-        mails = ElectronicMail.search([
-                    ('mailbox', '=', pending_mailbox)
-                    ], order=[('date', 'ASC'), ('id', 'ASC')])
-
         activities = []
         activity_attachments = []
         for mail in mails:
+            if mail.mailbox == processed_mailbox:
+                continue
             activity = Activity()
             if mail.subject:
                 activity.subject = mail.subject.replace('\r', '')