Allow to fixate a booking from Booking-Wizard

wizard_booking.py

@@ -7,7 +7,7 @@ from trytond.model import ModelView, fields
 from trytond.wizard import Wizard, StateView, StateTransition, Button
 from trytond.pool import Pool
 from trytond.transaction import Transaction
-from trytond.pyson import Eval, Bool, If
+from trytond.pyson import Eval, Bool, If, And
 from decimal import Decimal
 from .line import sel_bookingtype
 
@@ -45,7 +45,9 @@ class EnterBookingStart(ModelView):
         depends=['currency_digits', 'bookingtype'],
         digits=(16, Eval('currency_digits', 2)), required=True,
         domain=[('amount', '>=', Decimal('0.0'))])
-    description = fields.Text(string='Description')
+    description = fields.Text(
+        string='Description', states={'required': Bool(Eval('fixate'))},
+        depends=['fixate'])
     category = fields.Many2One(
         string='Category',
         model_name='cashbook.category', depends=['bookingtype'],
@@ -60,6 +62,8 @@ class EnterBookingStart(ModelView):
                 ('cattype', '=', 'in'),
                 ('cattype', '=', 'out'),
             )])
+    fixate = fields.Boolean(
+        string='Fixate', help='The booking is fixed immediately.')
 
     # party or cashbook as counterpart
     booktransf = fields.Many2One(
@@ -77,7 +81,10 @@ class EnterBookingStart(ModelView):
         string='Party', model_name='party.party',
         states={
             'invisible': ~Eval('bookingtype', '').in_(['in', 'out']),
-        }, depends=['bookingtype'])
+            'required': And(
+                Bool(Eval('fixate')),
+                Eval('bookingtype', '').in_(['in', 'out']))},
+        depends=['bookingtype', 'fixate'])
 
     @fields.depends('bookingtype', 'category')
     def on_change_bookingtype(self):
@@ -150,6 +157,7 @@ class EnterBookingWizard(Wizard):
                 book_ids.append(getattr(cfg1, x, None).id)
 
         result = {
+            'fixate': False,
             'cashbooks': [x.id for x in Cashbook.search([
                     ('state', '=', 'open'),
                     ('btype', '!=', None),
@@ -187,7 +195,9 @@ class EnterBookingWizard(Wizard):
         elif self.start.bookingtype in ['mvin', 'mvout']:
             query['booktransf'] = self.start.booktransf.id
 
-        Line.create([query])
+        lines = Line.create([query])
+        if self.start.fixate:
+            Line.wfcheck(lines)
         return 'end'
 
     def transition_savenext_(self):