Fallback to code to format currency without symbol

trytond/CHANGELOG

@@ -1,3 +1,4 @@
+* Fallback to code to format currency without symbol
 * Add sort method to order like ModelStorage.search
 * Do not alter argument values of with_transaction decorator (#12108)
 * Support SMALLINT and REAL as backend types

trytond/trytond/ir/lang.py

@@ -501,6 +501,9 @@ class Lang(DeactivableMixin, ModelSQL, ModelView):
                 or self.p_cs_precedes)
             separated = (val < 0 and self.n_sep_by_space
                 or self.p_sep_by_space)
+            if not smb and hasattr(currency, 'code'):
+                smb = currency.code
+                separated = True
 
             if precedes:
                 s = smb + (separated and ' ' or '') + s

trytond/trytond/tests/test_ir.py

@@ -142,6 +142,25 @@ class IrTestCase(ModuleTestCase):
                 lang.currency(value, currency, symbol, grouping, digits),
                 result)
 
+    @with_transaction()
+    def test_lang_currency_without_symbol(self):
+        "Test Lang.currency without symbol"
+        pool = Pool()
+        Lang = pool.get('ir.lang')
+        lang = Lang.get('en')
+        currency = Mock()
+        currency.digits = 2
+        currency.symbol = None
+        currency.code = 'USD'
+        test_data = [
+            (Decimal('10.50'), True, False, None, 'USD 10.50'),
+            (Decimal('10.50'), True, False, 4, 'USD 10.5000'),
+            ]
+        for value, symbol, grouping, digits, result in test_data:
+            self.assertEqual(
+                lang.currency(value, currency, symbol, grouping, digits),
+                result)
+
     @with_transaction()
     def test_lang_format(self):
         "Test Lang.format"