Set default value for journal's sequence

issue11157
review393471003

journal.py

@@ -71,7 +71,7 @@ class Journal(
 
     @classmethod
     def default_sequence(cls, **pattern):
-        return None
+        return cls.multivalue_model('sequence').default_sequence()
 
     @classmethod
     def search_rec_name(cls, name, clause):
@@ -189,6 +189,15 @@ class JournalSequence(ModelSQL, CompanyValueMixin):
             'account.journal', field_names, cls, value_names,
             parent='journal', fields=fields)
 
+    @classmethod
+    def default_sequence(cls):
+        pool = Pool()
+        ModelData = pool.get('ir.model.data')
+        try:
+            return ModelData.get_id('account', 'sequence_account_journal')
+        except KeyError:
+            return None
+
 
 class JournalCashContext(ModelView):
     'Journal Cash Context'

journal.xml

@@ -222,25 +222,21 @@ this repository contains the full copyright notices and license terms. -->
             <field name="name">Revenue</field>
             <field name="code">REV</field>
             <field name="type">revenue</field>
-            <field name="sequence" ref="sequence_account_journal"/>
         </record>
         <record model="account.journal" id="journal_expense">
             <field name="name">Expense</field>
             <field name="code">EXP</field>
             <field name="type">expense</field>
-            <field name="sequence" ref="sequence_account_journal"/>
         </record>
         <record model="account.journal" id="journal_cash">
             <field name="name">Cash</field>
             <field name="code">CASH</field>
             <field name="type">cash</field>
-            <field name="sequence" ref="sequence_account_journal"/>
         </record>
         <record model="account.journal" id="journal_stock">
             <field name="name">Stock</field>
             <field name="code">STO</field>
             <field name="type">general</field>
-            <field name="sequence" ref="sequence_account_journal"/>
         </record>
     </data>
 </tryton>