From 9ccb8068a1e46fca83c7cc948cb66f17f5d570d2 Mon Sep 17 00:00:00 2001
From: Joseph Spiros <joseph.spiros@ithinksw.com>
Date: Wed, 30 Jun 2010 07:44:35 -0400
Subject: [PATCH] Added uniqueness constraints to Tag, NewsletterArticle, and
 NewsletterIssue, and added ordering to NewsletterArticle and NewsletterIssue.

---
 contrib/penfield/models.py | 8 ++++++++
 models/base.py             | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/contrib/penfield/models.py b/contrib/penfield/models.py
index 3456c91..371ea57 100644
--- a/contrib/penfield/models.py
+++ b/contrib/penfield/models.py
@@ -154,6 +154,10 @@ class NewsletterArticle(Entity, Titled):
 	date = models.DateTimeField(default=datetime.now)
 	lede = models.TextField(null=True, blank=True)
 	full_text = models.TextField()
+	
+	class Meta:
+		ordering = ['-date']
+		unique_together = (('newsletter', 'slug'),)
 
 
 register_value_model(NewsletterArticle)
@@ -163,6 +167,10 @@ class NewsletterIssue(Entity, Titled):
 	newsletter = models.ForeignKey(Newsletter, related_name='issues')
 	number = models.PositiveIntegerField()
 	articles = models.ManyToManyField(NewsletterArticle)
+	
+	class Meta:
+		ordering = ['-number']
+		unique_together = (('newsletter', 'number'),)
 
 
 class NewsletterView(MultiView):
diff --git a/models/base.py b/models/base.py
index 9434825..700b1e7 100644
--- a/models/base.py
+++ b/models/base.py
@@ -9,7 +9,7 @@ from UserDict import DictMixin
 
 class Tag(models.Model):
 	name = models.CharField(max_length=250)
-	slug = models.SlugField()
+	slug = models.SlugField(unique=True)
 	
 	def __unicode__(self):
 		return self.name
-- 
2.20.1