Initial import from Docker volume

model/active.py

@@ -0,0 +1,43 @@
+# This file is part of Tryton.  The COPYRIGHT file at the toplevel of this
+# repository contains the full copyright notices and license terms.
+from trytond.i18n import lazy_gettext
+from trytond.pyson import Eval
+
+from . import fields
+from .model import Model
+from .modelview import ModelView
+
+
+class DeactivableMixin(Model):
+    "Mixin to allow to soft deletion of records"
+    __slots__ = ()
+
+    active = fields.Boolean(
+        lazy_gettext('ir.msg_active'),
+        help=lazy_gettext('ir.msg_active_help'))
+
+    @classmethod
+    def default_active(cls):
+        return True
+
+    @classmethod
+    def __post_setup__(cls):
+        super().__post_setup__()
+
+        inactive = ~Eval('active', cls.default_active())
+        for name, field in cls._fields.items():
+            if name == 'active':
+                continue
+            if 'readonly' in field.states:
+                field.states['readonly'] |= inactive
+            else:
+                field.states['readonly'] = inactive
+
+        if issubclass(cls, ModelView):
+            for states in cls._buttons.values():
+                if 'readonly' in states:
+                    states['readonly'] |= inactive
+                else:
+                    states['readonly'] = inactive
+                if 'active' not in states.setdefault('depends', []):
+                    states['depends'].append('active')