Make compatible with Django 1.7 migrations

.gitignore

@@ -0,0 +1,3 @@
+*.pyc
+.idea
+*.egg-info

timezone_field/fields.py

@@ -3,7 +3,7 @@
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.utils import six
-from django.utils.encoding import smart_text
+from django.utils.encoding import smart_text, force_text
 
 
 class TimeZoneFieldBase(models.Field):
@@ -72,7 +72,24 @@ def _get_python_and_db_repr(self, value):
 # http://packages.python.org/six/#six.with_metaclass
 class TimeZoneField(six.with_metaclass(models.SubfieldBase,
                                        TimeZoneFieldBase)):
-    pass
+    def deconstruct(self):
+        # as field attributes, we want to preserve the max_length and if it
+        # exists, also the default the user has specified
+        keywords = {'max_length': TimeZoneField.MAX_LENGTH}
+        if self.default != models.fields.NOT_PROVIDED:
+            keywords['default'] = self.default
+
+        # information to recreate the field
+        return (
+            force_text(self.name, strings_only=True),  # name of the field on
+                                                       # the model
+            'timezone_field.fields.TimeZoneField',     # import path of the
+                                                       # field
+            (),                                        # list of positional
+                                                       # arguments
+            keywords                                   # dict of keyword
+                                                       # arguments
+        )
 
 
 # South support

timezone_field/test_settings.py

@@ -28,6 +28,11 @@
         },
     }
 
+# The name of the class to use for starting the test suite. Set
+# explicitly to the default value to silence an upgrade path warning
+# on Django 1.7.
+TEST_RUNNER = 'django.test.runner.DiscoverRunner'
+
 # Local time zone for this installation. Choices can be found here:
 # http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
 # although not all choices may be available on all operating systems.

timezone_field/tests.py

@@ -34,6 +34,7 @@ class TestForm(forms.Form):
 class TestModelForm(forms.ModelForm):
     class Meta:
         model = TestModel
+#        fields = ['tz', 'tz_opt', 'tz_opt_default',]
 
 
 class TimeZoneFormFieldTestCase(TestCase):