Initial import from Docker volume

model/fields/boolean.py

@@ -0,0 +1,38 @@
+# 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 .field import Field
+
+
+class Boolean(Field):
+    '''
+    Define a boolean field (``True`` or ``False``).
+    '''
+    _type = 'boolean'
+    _sql_type = 'BOOL'
+    _py_type = bool
+
+    def __init__(self, string='', help='', readonly=False, domain=None,
+            states=None, on_change=None, on_change_with=None,
+            depends=None, context=None, loading='eager'):
+        super(Boolean, self).__init__(string=string, help=help, required=False,
+            readonly=readonly, domain=domain, states=states,
+            on_change=on_change, on_change_with=on_change_with,
+            depends=depends, context=context, loading=loading)
+
+    __init__.__doc__ = Field.__init__.__doc__
+
+    def _domain_add_null(self, column, operator, value, expression):
+        expression = super(Boolean, self)._domain_add_null(
+            column, operator, value, expression)
+        if operator in ('=', '!='):
+            conv = {
+                False: None,
+                None: False,
+                }
+            if value is False or value is None:
+                if operator == '=':
+                    expression |= (column == conv[value])
+                else:
+                    expression &= (column != conv[value])
+        return expression