Fix slug field handling

taggit_machinetags/fields.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+import re
+
+from django.core.validators import RegexValidator
+from django.db.models.fields import SlugField
+
+
+slug_re = re.compile(r'^[-a-zA-Z0-9_]+(:[-a-zA-Z0-9_]+)?$')
+validate_slug = RegexValidator(
+    slug_re,
+    'Enter a valid slug with an optional colon separator.'
+)
+
+
+class MachineSlugField(SlugField):
+
+    default_validators = [validate_slug]

taggit_machinetags/models.py

@@ -6,6 +6,8 @@
 from django.template.defaultfilters import slugify
 from taggit.models import GenericTaggedItemBase
 
+from taggit_machinetags.fields import MachineSlugField
+
 
 @python_2_unicode_compatible
 class MachineTagBase(models.Model):
@@ -15,7 +17,7 @@ class MachineTagBase(models.Model):
     namespace = models.CharField(max_length=100, blank=True, default='')
     namespace_slug = models.SlugField(
         max_length=100, blank=True, default='', editable=False)
-    slug = models.SlugField(
+    slug = MachineSlugField(
         max_length=201, unique=True, db_index=True, editable=False)
 
     class Meta:

taggit_machinetags/tests.py

@@ -5,8 +5,9 @@
 from django_any import any_model
 from mock import Mock
 
-from .managers import _MachineTaggableManager, MachineTaggableManager
-from .models import MachineTag
+from taggit_machinetags.managers import (
+    _MachineTaggableManager, MachineTaggableManager)
+from taggit_machinetags.models import MachineTag
 
 
 class TestMachineTagModel(TransactionTestCase):

tox.ini

@@ -4,5 +4,6 @@ envlist = py27, py33, pypy
 [testenv]
 PYTHONPATH = {toxinidir}:{toxinidir}/debreach
 commands = python setup.py test
+install_command = pip install {opts} {packages}
 deps =
     -r{toxinidir}/requirements.txt