__init__.py

@@ -22,6 +22,7 @@ def register():
         calibration.CalibrationSample,
         configuration.Configuration,
         diary.Diary,
+        contract.Cron,
         contract.Contract,
         contract.ContractMaintenanceServices,
         contract.ContractEquipment,

contract.py

@@ -13,9 +13,19 @@ from trytond.modules.currency.fields import Monetary
 from trytond.modules.product import price_digits
 
 import datetime
-from datetime import timedelta
+from datetime import timedelta, date
 
+class Cron(metaclass=PoolMeta):
+    __name__ = 'ir.cron'
 
+    @classmethod
+    def __setup__(cls):
+        super().__setup__()
+        cls.method.selection.append(
+            ('optical_equipment.contract|contract_expiration', 'Contract Expiration'),
+        )
+
+        
 class Contract(Workflow, ModelSQL, ModelView):
     'Contracts'
     __name__ = 'optical_equipment.contract'
@@ -93,6 +103,7 @@ class Contract(Workflow, ModelSQL, ModelView):
         cls._buttons.update({
             'draft': {'invisible': Eval('state').in_(['draft','closed'])},
             'running': {'invisible': Eval('state').in_(['cancelled', 'running'])},
+            'closed': {'invisible': True},
             'cancelled': {'invisible': Eval('state').in_(['draft', 'cancelled'])}
         })
 
@@ -121,6 +132,18 @@ class Contract(Workflow, ModelSQL, ModelView):
         else:
             raise UserError(gettext('optical_equipment.msg_not_sequence_equipment'))
 
+    @classmethod
+    def contract_expiration(cls):
+        pool = Pool()
+        Contracts = pool.get('optical_equipment.contract')
+
+        contracts_to_expire = cls.search([('state', '=', 'running'),
+                                          ('end_date', '<=', date.today())])
+
+        if contracts_to_expire != []:
+            for contract in contracts_to_expire:
+                cls.closed([contract])
+    
     @classmethod
     @ModelView.button
     @Workflow.transition('draft')
@@ -131,6 +154,15 @@ class Contract(Workflow, ModelSQL, ModelView):
             equipment.contract_history += (contract.id,)
             equipment.save()
 
+    @classmethod
+    @ModelView.button
+    @Workflow.transition('closed')
+    def closed(cls, contracts):
+        contract = contracts[0]
+        for equipment in contract.equipments:
+            equipment.state = "uncontrated"
+            equipment.save()
+
 
     @classmethod
     @ModelView.button

contract.xml

@@ -70,6 +70,11 @@
 	    <field name="string">Run</field>
 	    <field name="model" search="[('model', '=', 'optical_equipment.contract')]"/>
 	</record>
+	<record model="ir.model.button" id="contract_closed_button">
+	    <field name="name">closed</field>
+	    <field name="string">Closed</field>
+	    <field name="model" search="[('model', '=', 'optical_equipment.contract')]"/>
+	</record>
 	<record model="ir.model.button" id="contract_cancelled_button">
 	    <field name="name">cancelled</field>
 	    <field name="string">Cancel</field>
@@ -149,5 +154,10 @@
 	    action="act_contract_form"
             sequence="30"
             id="menu_contract_form"/>
+	<record model="ir.cron" id="cron_fe_delivery">
+	    <field name="method">optical_equipment.contract|contract_expiration</field>
+	    <field name="interval_number" eval="1"/>
+	    <field name="interval_type">hours</field>
+	</record>
     </data>
 </tryton>