add lines to subcription

sale.py

@@ -1,8 +1,9 @@
 from trytond.pool import Pool, PoolMeta
 from trytond.model import ModelView, ModelSQL, fields
+from trytond.modules.currency.fields import Monetary
 from trytond.pyson import Eval, Bool, If
 from decimal import Decimal
-
+from trytond.modules.product import price_digits
 from trytond.transaction import Transaction
 from trytond.exceptions import UserError
 
@@ -16,12 +17,15 @@ class CreateSubscriptionStart(ModelView):
 
     start_date = fields.Date("Start Date", required=True)
     end_date = fields.Date("End Date", required=True)
-    invoice_recurrence = fields.Many2One('sale.subscription.recurrence.rule.set', "Invoice Recurrence",
-                                         required=True)
+    invoice_recurrence = fields.Many2One('sale.subscription.recurrence.rule.set',
+                                         "Invoice Recurrence",required=True)
     invoice_start_date = fields.Date("Invoice Start Date",
                                      help='Billing start date')
     service = fields.Many2One('sale.subscription.service', "Service")
     quantity = fields.Float("Quantity", digits='unit')
+    unit_price = Monetary("Unit Price", currency='currency',
+                          digits=price_digits,
+                          )
     
     @classmethod
     def default_start_date(cls):
@@ -47,28 +51,45 @@ class CreateSubscription(Wizard):
                       ])
     create_subscription = StateAction('sale_subscription.act_subscription_form')
 
+    def get_subscription_lines(self):
+        pool = Pool()
+        SubscriptionLine = pool.get('sale.subscription.line')
+        subscription_line = SubscriptionLine()
+        subscription_line.start_date = self.start_date
+        subscription_line.end_date = self.end_date
+        subscription_line.service = self.service
+        subcription_line.quantity = self.quantity
+        subcription_line.unit = self.service.product.unit
+        subscription_line.consumpiton_recurrence = self.service.consumption_recurrence
+        #raise UserError(str(dir(subscription_line)))
+        return [subscription_line]
+
     @property
     def _subscription_start(self):
-        #raise UserError(str(dir(self)))
         sale = self.records[0]
         #raise UserError(str(dir(self.records[0])))
+        subscription_lines = []
+        #subscription.lines.append(get_subscription_lines())
         return dict(start_date = self.start.start_date,
                     end_date = self.start.end_date,
                     invoice_recurrence = self.start.invoice_recurrence,
-                    invoice_start_date = self.start.invoice_start_date,service = self.start.service,
+                    invoice_start_date = self.start.invoice_start_date,
+                    service = self.start.service,
                     quantity = self.start.quantity,
                     party=sale.party.id,
                     contact=sale.contact.id if sale.contact else None,
                     invoice_party=sale.invoice_party.id if sale.invoice_party else None,
                     invoice_address=sale.invoice_address.id,
-                    payment_term=sale.payment_term.id if sale.payment_term else None)
+                    payment_term=sale.payment_term.id if sale.payment_term else None,
+                    )
     
     def do_create_subscription(self, action):
         pool = Pool()
         Subscription = pool.get('sale.subscription')
-        #SubscriptionLine = pool.get('sale.subscription.line')
-        raise UserError(str(dir(Subscription.lines)))
+        #raise UserError(str(dir(self)))
         a = self._subscription_start
+        #self.get_subscription_lines()
+        #raise UserError(str(dir(Subscription)))
         subscription = Subscription(
             start_date=a['start_date'],
             end_date=a['end_date'],
@@ -80,6 +101,7 @@ class CreateSubscription(Wizard):
             invoice_address=a['invoice_address'],
             payment_term=a['payment_term'],
         )
+        subscription.lines.append(get_subscription_lines())
         subscription.save()
 
         #raise UserError(str(dir(subscription)))
@@ -96,8 +118,7 @@ class SaleLine(metaclass=PoolMeta):
     address_equipment = fields.Many2One('party.address', "Direccion")
     unit_digits = fields.Function(fields.Integer('Unit Digits'),
         'on_change_with_unit_digits')
-
-     
+    
     def on_change_with_unit_digits(self, name=None):
         if self.unit:
             return self.unit.digits

view/create_subscription_form.xml

@@ -21,5 +21,7 @@ this repository contains the full copyright notices and license terms. -->
         <field name="service"/>
 	<label name="quantity"/>
         <field name="quantity"/>
+	<label name="unit_price"/>
+        <field name="unit_price"/>
     </group>
 </form>