first commit

modules/currency/fields.py

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+# 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.model import fields
+
+__all__ = ['Monetary']
+
+
+class Monetary(fields.Numeric):
+    """
+    Define a numeric field with currency (``decimal``).
+    """
+    def __init__(self, string='', currency=None, digits=None, help='',
+            required=False, readonly=False, domain=None, states=None,
+            on_change=None, on_change_with=None, depends=None, context=None,
+            loading='eager'):
+        '''
+        :param currency: the name of the Many2One field which stores
+            the currency
+        '''
+        if currency:
+            if depends is None:
+                depends = set()
+            else:
+                depends = set(depends)
+            depends.add(currency)
+        super().__init__(string=string, digits=digits, help=help,
+            required=required, readonly=readonly, domain=domain, states=states,
+            on_change=on_change, on_change_with=on_change_with,
+            depends=depends, context=context, loading=loading)
+        self.currency = currency
+
+    def definition(self, model, language):
+        definition = super().definition(model, language)
+        definition['symbol'] = self.currency
+        definition['monetary'] = True
+        return definition