Fix CompositeType

Fix CompositeType bind parameter processing when of the fields is
of TypeDecorator type.

CHANGES.rst

@@ -4,6 +4,12 @@ Changelog
 Here you can see the full list of changes between each SQLAlchemy-Utils release.
 
 
+0.30.4 (2015-05-27)
+^^^^^^^^^^^^^^^^^^^
+
+- Fixed CompositeType bind parameter processing when one of the fields is of TypeDecorator type.
+
+
 0.30.3 (2015-05-27)
 ^^^^^^^^^^^^^^^^^^^
 

sqlalchemy_utils/__init__.py

@@ -90,4 +90,4 @@ from .types import (  # noqa
     WeekDaysType
 )
 
-__version__ = '0.30.3'
+__version__ = '0.30.4'

sqlalchemy_utils/types/pg_composite.py

@@ -173,6 +173,21 @@ class CompositeType(UserDefinedType, SchemaType):
     def get_col_spec(self):
         return self.name
 
+    def bind_processor(self, dialect):
+        def process(value):
+            processed_value = []
+            for i, column in enumerate(self.columns):
+                if isinstance(column.type, TypeDecorator):
+                    processed_value.append(
+                        column.type.process_bind_param(
+                            value[i], dialect
+                        )
+                    )
+                else:
+                    processed_value.append(value[i])
+            return tuple(processed_value)
+        return process
+
     def result_processor(self, dialect, coltype):
         def process(value):
             cls = value.__class__

tests/types/test_composite.py

@@ -73,7 +73,7 @@ class TestCompositeTypeWithTypeDecorators(TestCase):
 
         self.Account = Account
 
-    def test_parameter_processing(self):
+    def test_result_set_processing(self):
         account = self.Account(
             balance=('USD', 15)
         )
@@ -85,6 +85,18 @@ class TestCompositeTypeWithTypeDecorators(TestCase):
         assert account.balance.currency == Currency('USD')
         assert account.balance.amount == 15
 
+    def test_parameter_processing(self):
+        account = self.Account(
+            balance=(Currency('USD'), 15)
+        )
+
+        self.session.add(account)
+        self.session.commit()
+
+        account = self.session.query(self.Account).first()
+        assert account.balance.currency == Currency('USD')
+        assert account.balance.amount == 15
+
 
 @mark.skipif('babel is None')
 class TestCompositeTypeInsideArray(TestCase):