Don't require color for solid diaper change entries.

core/models.py

@@ -143,12 +143,6 @@ class DiaperChange(models.Model):
             raise ValidationError(
                 'Wet and/or solid is required.', code='wet_or_solid')
 
-        # Color is required when Solid is selected.
-        if self.solid and not self.color:
-            raise ValidationError(
-                {'color': 'Color is required for solid diaper changes.'},
-                code='solid_color_required')
-
 
 class Feeding(models.Model):
     model_name = 'feeding'

core/tests/tests_forms.py

@@ -67,15 +67,9 @@ class FormsTestCase(TestCase):
         page = self.c.post('/changes/{}/'.format(entry.id), params)
         self.assertEqual(page.status_code, 302)
 
-        params['solid'] = 0
-        params['color'] = ''
-        page = self.c.post('/changes/{}/'.format(entry.id), params)
-        self.assertEqual(page.status_code, 200)
-        self.assertFormError(page, 'form', 'color',
-                             'Color is required for solid diaper changes.')
-
         del params['solid']
         del params['wet']
+        del params['color']
         page = self.c.post('/changes/{}/'.format(entry.id), params)
         self.assertEqual(page.status_code, 200)
         self.assertFormError(page, 'form', None,