Fix interval string handling

setup.py

@@ -39,7 +39,7 @@ extras_require = {
     'anyjson': ['anyjson>=0.3.3'],
     'babel': ['Babel>=1.3'],
     'arrow': ['arrow>=0.3.4'],
-    'intervals': ['intervals>=0.2.4'],
+    'intervals': ['intervals>=0.7.1'],
     'phone': ['phonenumbers>=5.9.2'],
     'password': ['passlib >= 1.6, < 2.0'],
     'color': ['colour>=0.0.4'],

sqlalchemy_utils/types/range.py

@@ -286,13 +286,17 @@ class RangeType(types.TypeDecorator, ScalarCoercible):
         return value
 
     def process_result_value(self, value, dialect):
+        if isinstance(value, six.string_types):
+            factory_func = self.interval_class.from_string
+        else:
+            factory_func = self.interval_class
         if value is not None:
             if self.interval_class.step is not None:
                 return self.canonicalize_result_value(
-                    self.interval_class(value, step=self.step)
+                    factory_func(value, step=self.step)
                 )
             else:
-                return self.interval_class(value, step=self.step)
+                return factory_func(value, step=self.step)
         return value
 
     def canonicalize_result_value(self, value):

tests/types/test_int_range.py

@@ -50,7 +50,7 @@ class NumberRangeTestCase(object):
         assert building.persons_at_night is None
 
     def test_update_with_none(self, session, create_building):
-        interval = intervals.IntInterval('(,)')
+        interval = intervals.IntInterval([None, None])
         building = create_building(interval)
         building.persons_at_night = None
         assert building.persons_at_night is None
@@ -61,7 +61,7 @@ class NumberRangeTestCase(object):
         'number_range',
         (
             [1, 3],
-            '1 - 3',
+            (0, 4),
         )
     )
     def test_save_number_range(self, create_building, number_range):
@@ -94,10 +94,6 @@ class NumberRangeTestCase(object):
         building = session.query(Building).first()
         assert building.persons_at_night is None
 
-    def test_string_coercion(self, Building):
-        building = Building(persons_at_night='[12, 18]')
-        assert isinstance(building.persons_at_night, intervals.IntInterval)
-
     def test_integer_coercion(self, Building):
         building = Building(persons_at_night=15)
         assert building.persons_at_night.lower == 15
@@ -110,7 +106,6 @@ class TestIntRangeTypeOnPostgres(NumberRangeTestCase):
         'number_range',
         (
             [1, 3],
-            '1 - 3',
             (0, 4)
         )
     )
@@ -158,7 +153,6 @@ class TestIntRangeTypeOnPostgres(NumberRangeTestCase):
         'number_range',
         (
             [[1, 3]],
-            ['1 - 3'],
             [(0, 4)],
         )
     )
@@ -180,7 +174,6 @@ class TestIntRangeTypeOnPostgres(NumberRangeTestCase):
         'number_range',
         (
             [1, 3],
-            '1 - 3',
             (0, 4),
         )
     )
@@ -202,7 +195,6 @@ class TestIntRangeTypeOnPostgres(NumberRangeTestCase):
         'number_range',
         (
             [1, 3],
-            '1 - 3',
             (0, 4),
         )
     )
@@ -224,7 +216,6 @@ class TestIntRangeTypeOnPostgres(NumberRangeTestCase):
         'number_range',
         (
             [1, 3],
-            '1 - 3',
             (1, 3),
             2
         )
@@ -247,7 +238,6 @@ class TestIntRangeTypeOnPostgres(NumberRangeTestCase):
         'number_range',
         (
             [1, 3],
-            '1 - 3',
             (0, 8),
             (-inf, inf)
         )
@@ -270,7 +260,6 @@ class TestIntRangeTypeOnPostgres(NumberRangeTestCase):
         'number_range',
         (
             [2, 5],
-            '0 - 2',
             0
         )
     )
@@ -303,7 +292,6 @@ class TestIntRangeTypeOnPostgres(NumberRangeTestCase):
         'number_range',
         (
             [1, 2],
-            '1 - 3',
             (0, 4),
             [0, 3],
             0,

tests/types/test_numeric_range.py

@@ -51,7 +51,7 @@ class NumericRangeTestCase(object):
         'number_range',
         (
             [1, 3],
-            '1 - 3',
+            (1, 3)
         )
     )
     def test_save_number_range(self, create_car, number_range):
@@ -84,10 +84,6 @@ class NumericRangeTestCase(object):
         car = session.query(Car).first()
         assert car.price_range is None
 
-    def test_string_coercion(self, Car):
-        car = Car(price_range='[12, 18]')
-        assert isinstance(car.price_range, intervals.DecimalInterval)
-
     def test_integer_coercion(self, Car):
         car = Car(price_range=15)
         assert car.price_range.lower == 15
@@ -124,7 +120,6 @@ class TestNumericRangeOnPostgres(NumericRangeTestCase):
 
 @pytest.mark.skipif('intervals is None')
 class TestNumericRangeWithStep(object):
-
     @pytest.fixture
     def Car(self, Base):
         class Car(Base):