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modules/stock_lot/product.py

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+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from trytond.model import ModelSQL, ValueMixin, fields
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval, Id
+
+
+class Configuration(metaclass=PoolMeta):
+    __name__ = 'product.configuration'
+
+    default_lot_sequence = fields.MultiValue(
+        fields.Many2One(
+            'ir.sequence', "Default Lot Sequence",
+            domain=[
+                ('sequence_type', '=',
+                    Id('stock_lot', 'sequence_type_stock_lot')),
+                ('company', '=', None),
+                ]))
+
+
+class ConfigurationDefaultLotSequence(ModelSQL, ValueMixin):
+    __name__ = 'product.configuration.default_lot_sequence'
+    default_lot_sequence = fields.Many2One(
+        'ir.sequence', "Default Lot Sequence",
+        domain=[
+            ('sequence_type', '=',
+                Id('stock_lot', 'sequence_type_stock_lot')),
+            ('company', '=', None),
+            ])
+
+
+class Template(metaclass=PoolMeta):
+    __name__ = 'product.template'
+
+    lot_required = fields.MultiSelection([
+            ('supplier', "Supplier"),
+            ('customer', "Customer"),
+            ('lost_found', "Lost and Found"),
+            ('storage', "Storage"),
+            ('production', "Production"),
+            ], "Lot Required",
+        help='The type of location for which lot is required.',
+        states={
+            'invisible': ~Eval('type').in_(['goods', 'assets']),
+            })
+    lot_sequence = fields.Many2One(
+        'ir.sequence', "Lot Sequence",
+        domain=[
+            ('sequence_type', '=', Id('stock_lot', 'sequence_type_stock_lot')),
+            ('company', '=', None),
+            ],
+        states={
+            'invisible': ~Eval('type').in_(['goods', 'assets']),
+            },
+        help="The sequence used to automatically number lots.")
+
+    @classmethod
+    def default_lot_sequence(cls, **pattern):
+        pool = Pool()
+        Configuration = pool.get('product.configuration')
+        sequence = Configuration(1).get_multivalue(
+            'default_lot_sequence', **pattern)
+        return sequence.id if sequence else None
+
+
+class Product(metaclass=PoolMeta):
+    __name__ = 'product.product'
+
+    def lot_is_required(self, from_, to):
+        'Is product lot required for move with "from_" and "to" location ?'
+        return any(l.type in (self.lot_required or []) for l in [from_, to])
+
+    def create_lot(self):
+        pool = Pool()
+        Lot = pool.get('stock.lot')
+        if self.lot_sequence:
+            lot = Lot(product=self)
+            try:
+                lot.on_change_product()
+            except AttributeError:
+                pass
+            return lot