minor tweaks

gino/crud.py

@@ -88,7 +88,7 @@ def __init__(self, instance: 'CRUDModel'):
             try:
                 self._locator = instance.lookup()
             except LookupError:
-                # apply() will fail anyway, but still allow updates()
+                # apply() will fail anyway, but still allow update()
                 pass
 
     def _set(self, key, value):
@@ -144,7 +144,9 @@ async def apply(self, bind=None, timeout=DEFAULT):
                         sa.func.jsonb_build_object(
                             *itertools.chain(*updates.items())))
             else:
-                raise TypeError('{} is not supported.'.format(prop.type))
+                raise TypeError('{} is not supported to update json '
+                                'properties in Gino. Please consider using '
+                                'JSONB.'.format(prop.type))
 
         opts = dict(return_model=False)
         if timeout is not DEFAULT:

gino/declarative.py

@@ -7,18 +7,18 @@
 
 
 class ColumnAttribute:
-    def __init__(self, name, column):
-        self.name = name
+    def __init__(self, prop_name, column):
+        self.prop_name = prop_name
         self.column = column
 
     def __get__(self, instance, owner):
         if instance is None:
             return self.column
         else:
-            return instance.__values__.get(self.name)
+            return instance.__values__.get(self.prop_name)
 
     def __set__(self, instance, value):
-        instance.__values__[self.name] = value
+        instance.__values__[self.prop_name] = value
 
     def __delete__(self, instance):
         raise AttributeError('Cannot delete value.')
@@ -36,7 +36,7 @@ def __init__(self, *args, **kwargs):
             self._inverted_dict[v] = k
 
     def __setitem__(self, key, value):
-        if value in self._inverted_dict:
+        if value in self._inverted_dict and self._inverted_dict[value] != key:
             raise GinoException(
                 'Column name {} already maps to {}'.format(
                     value, self._inverted_dict[value]))

tests/test_declarative.py

@@ -229,6 +229,7 @@ async def test_invert_dict():
     with pytest.raises(gino.GinoException,
                        match=r'Column name c1 already maps to \w+'):
         InvertDict({'col1': 'c1', 'col2': 'c1'})
+
     with pytest.raises(gino.GinoException,
                        match=r'Column name c1 already maps to \w+'):
         d = InvertDict()
@@ -237,6 +238,8 @@ async def test_invert_dict():
 
     d = InvertDict()
     d['col1'] = 'c1'
+    # it works for same key/value pair
+    d['col1'] = 'c1'
     d['col2'] = 'c2'
     assert d.invert_get('c1') == 'col1'
     assert d.invert_get('c2') == 'col2'

tests/test_json.py

@@ -102,10 +102,10 @@ class News(db.Model):
     try:
         news = await News.create()
         assert news.visits == 0
-        with pytest.raises(TypeError, match='JSON is not supported.'):
+        with pytest.raises(TypeError, match='JSON is not supported'):
             await news.update(visits=News.visits + 10).apply()
         assert news.visits == 0
-        with pytest.raises(TypeError, match='JSON is not supported.'):
+        with pytest.raises(TypeError, match='JSON is not supported'):
             await news.update(visits=10).apply()
         assert news.visits == 10
         assert await news.select('visits').gino.scalar() == 0
@@ -185,7 +185,7 @@ class PropsTest(db.Model):
         profile1 = db.Column(JSON(), nullable=False, server_default='{}')
 
         bool = db.BooleanProperty()
-        bool1 = db.BooleanProperty(column_name='profile1')
+        bool1 = db.BooleanProperty(prop_name='profile1')
 
     await PropsTest.gino.create()
     try: