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modules/account_dunning/account.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 PoolMeta
+
+default_dunning_procedure = fields.Many2One(
+    'account.dunning.procedure', "Default Dunning Procedure",
+    help="The default dunning procedure for new customers.")
+
+
+class Configuration(metaclass=PoolMeta):
+    __name__ = 'account.configuration'
+    default_dunning_procedure = fields.MultiValue(default_dunning_procedure)
+
+
+class ConfigurationDefaultDunningProcedure(ModelSQL, ValueMixin):
+    __name__ = 'account.configuration.default_dunning_procedure'
+    default_dunning_procedure = default_dunning_procedure
+
+
+class MoveLine(metaclass=PoolMeta):
+    __name__ = 'account.move.line'
+
+    dunnings = fields.One2Many('account.dunning', 'line', 'Dunnings')
+
+    @property
+    def dunning_procedure(self):
+        if self.party:
+            return self.party.dunning_procedure
+
+    @classmethod
+    def copy(cls, lines, default=None):
+        if default is None:
+            default = {}
+        else:
+            default = default.copy()
+        default.setdefault('dunnings', None)
+        return super().copy(lines, default=default)