feat: Se añade funcionalidad para cambiar metodo de pago

__init__.py

@@ -21,6 +21,7 @@ def register():
         device.SaleDeviceStatementJournal,
         sale.Sale,
         sale.SalePaymentForm,
+        sale.ChangePaymentMethodForm,
         statement.OpenStatementStart,
         statement.OpenStatementDone,
         statement.CloseStatementStart,
@@ -29,6 +30,7 @@ def register():
         module='sale_payment', type_='model')
     Pool.register(
         sale.WizardSalePayment,
+        sale.ChangePaymentMethod,
         sale.WizardSaleReconcile,
         statement.OpenStatement,
         statement.CloseStatement,

sale.py

@@ -37,10 +37,11 @@ class Sale(metaclass=PoolMeta):
     def __setup__(cls):
         super(Sale, cls).__setup__()
         cls._buttons.update({
-                'wizard_sale_payment': {
-                    'invisible': Eval('state') == 'done',
-                    'readonly': Not(Bool(Eval('lines'))),
+            'wizard_sale_payment': {
+                'invisible': Eval('state') == 'done',
+                'readonly': Not(Bool(Eval('lines'))),
                     },
+            'wizard_change_payment_method': {},
                 })
 
     @staticmethod
@@ -179,6 +180,11 @@ class Sale(metaclass=PoolMeta):
     def wizard_sale_payment(cls, sales):
         pass
 
+    @classmethod
+    @ModelView.button_action('sale_payment.wizard_sale_change_payment_method')
+    def wizard_change_payment_method(cls, sales):
+        pass
+
     @classmethod
     def copy(cls, sales, default=None):
         if default is None:
@@ -187,6 +193,63 @@ class Sale(metaclass=PoolMeta):
         return super(Sale, cls).copy(sales, default)
 
 
+class ChangePaymentMethodForm(ModelView):
+    'Change Payments Method form'
+    __name__ = 'sale.change_payment_method.form'
+    sale = fields.Many2One('sale.sale', "Sale", required=True)
+    statement = fields.Many2One('account.statement', 'Statement Journal',
+                                domain=[
+                                    ('id', 'in', Eval('statements', [])),
+                                ],
+                                depends=['journals'], required=True)
+    statements = fields.One2Many('account.statement', None,
+                                 'Allowed Statement', readonly=True)
+    payment = fields.Many2One(
+        'account.statement.line', "Payment", required=True,
+        domain=[('sale.id', '=', Eval('sale'))])
+
+
+class ChangePaymentMethod(Wizard):
+    'Change Payments Method for the sale'
+    __name__ = 'sale.change_payment_method'
+    start = StateView('sale.change_payment_method.form',
+                      'sale_payment.sale_change_payment_method_view_form', [
+                          Button('Cancel', 'end', 'tryton-cancel'),
+                          Button('Modify', 'modify_payments_', 'tryton-ok',
+                                 default=True),])
+
+    modify_payments_ = StateTransition()
+
+    def default_start(self, fields):
+        pool = Pool()
+        Sale = pool.get('sale.sale')
+        User = pool.get('res.user')
+        Statement = pool.get('account.statement')
+        sale = Sale(Transaction().context['active_id'])
+        user = User(Transaction().user)
+        device = user.sale_device
+
+        if device:
+            journals = [j.id for j in device.journals]
+            draft_statements = Statement.search([
+                ('journal', 'in', journals),
+                ('state', '=', 'draft'),
+            ], order=[
+                ('create_date', 'ASC'),
+            ])
+
+        return {
+            'sale': sale.id,
+            'statements': [statement.id for statement in draft_statements],
+            }
+
+    def transition_modify_payments_(self):
+        self.start.payment.statement = self.start.statement.id
+        self.start.payment.save()
+
+        return 'end'
+
+
 class SalePaymentForm(ModelView):
     'Sale Payment Form'
     __name__ = 'sale.payment.form'

sale.xml

@@ -31,6 +31,16 @@ copyright notices and license terms. -->
             <field name="name">sale_payment_form</field>
         </record>
 
+	<record model="ir.action.wizard" id="wizard_sale_change_payment_method">
+            <field name="name">Change Payment Method</field>
+            <field name="wiz_name">sale.change_payment_method</field>
+        </record>
+        <record model="ir.ui.view" id="sale_change_payment_method_view_form">
+            <field name="model">sale.change_payment_method.form</field>
+            <field name="type">form</field>
+            <field name="name">change_payment_method_form</field>
+        </record>
+
         <record model="ir.action.wizard" id="act_sale_reconcile">
             <field name="name">Reconcile Sales</field>
             <field name="wiz_name">sale.reconcile</field>
@@ -43,6 +53,12 @@ copyright notices and license terms. -->
         </record>
 
         <!-- buttons -->
+	<record model="ir.model.button" id="sale_change_payment_method_wizard_button">
+            <field name="name">wizard_change_payment_method</field>
+            <field name="string">Change Payment Method</field>
+            <field name="model" search="[('model', '=', 'sale.sale')]"/>
+        </record>
+	
         <record model="ir.model.button" id="sale_payment_wizard_button">
             <field name="name">wizard_sale_payment</field>
             <field name="string">Pay</field>

view/sale_form.xml

@@ -5,6 +5,7 @@ copyright notices and license terms. -->
 <data>
     <xpath expr="/form/group/button[@name='process']" position="after">
         <button name="wizard_sale_payment" icon="tryton-forward"/>
+	<button name="wizard_change_payment_method" icon="tryton-forward"/>
     </xpath>
     <xpath expr="/form/notebook/page[@id='other']" position="after">
         <page string="Payments" col="4" id="payments">