[FIX] Tests and use related field instead of computed

pos_customer_required/__manifest__.py

@@ -21,8 +21,5 @@
         'views/pos_config_view.xml',
         'views/pos_order_view.xml',
     ],
-    'demo': [
-        'demo/pos_config.xml',
-    ],
     'installable': True,
 }

pos_customer_required/models/pos_config.py

@@ -11,16 +11,15 @@
 class PosConfig(models.Model):
     _inherit = 'pos.config'
 
-    _REQUIRE_CUSTOMER_KEYS = [
+    require_customer = fields.Selection([
         ('no', 'Optional'),
         ('payment', 'Required before paying'),
         ('order', 'Required before starting the order'),
-    ]
-
-    require_customer = fields.Selection(
-        selection=_REQUIRE_CUSTOMER_KEYS,
+        ],
         string='Require Customer',
+        default='no',
         help="Require customer for orders in this point of sale:\n"
         "* 'Optional' (customer is optional);\n"
         "* 'Required before paying';\n"
-        "* 'Required before starting the order';")
+        "* 'Required before starting the order';",
+    )

pos_customer_required/models/pos_order.py

@@ -11,24 +11,13 @@
 class PosOrder(models.Model):
     _inherit = 'pos.order'
 
-    @api.multi
-    @api.depends('session_id.config_id.require_customer')
-    def compute_require_customer(self):
-        for order in self:
-            order.require_customer = (
-                order.session_id.config_id.require_customer == 'order')
-
-    require_customer = fields.Boolean(
-        compute='compute_require_customer', string='Require customer',
-        help="True if a customer is required to begin the order.\n"
-        "See the PoS Config to change this setting")
+    require_customer = fields.Selection(
+        related='session_id.config_id.require_customer',
+    )
 
     @api.constrains('partner_id', 'require_customer')
     def _check_partner(self):
         for rec in self:
-            if (
-                rec.session_id.config_id.require_customer == 'order' and
-                not rec.partner_id
-            ):
+            if rec.require_customer != 'no' and not rec.partner_id:
                 raise exceptions.ValidationError(_(
                     'Customer is required for this order and is missing.'))

pos_customer_required/tests/test_pos.py

@@ -6,7 +6,7 @@
 class TestPosRequireCustomer(common.TransactionCase):
     def setUp(self):
         super(TestPosRequireCustomer, self).setUp()
-        self.pos_config = self.env.ref('point_of_sale.pos_config_main')
+        self.pos_config = self.env.ref('point_of_sale.pos_config_main').copy()
 
     def test_customer_not_required(self):
         self.pos_config.require_customer = 'no'

pos_customer_required/views/pos_order_view.xml

@@ -20,7 +20,7 @@
                 <field name="require_customer" invisible="1"/>
             </xpath>
             <xpath expr="//field[@name='partner_id']" position="attributes">
-                <attribute name="attrs">{'readonly': [('state','=','invoiced')], 'required': [('require_customer','=',True)]}</attribute>
+                <attribute name="attrs">{'readonly': [('state','=','invoiced')], 'required': [('require_customer', '!=', 'no')]}</attribute>
             </xpath>
         </field>
     </record>