Added a better slugify function, monthly archives work, notes are optional now.

[~kgodey/maayanwich.git] / slugify.py

diff --git a/slugify.py b/slugify.py
new file mode 100644 (file)
index 0000000..5765072
--- /dev/null
+++ b/slugify.py
@@ -0,0 +1,32 @@
+from django.template.defaultfilters import slugify
+def SlugifyUniquely(value, model, slugfield="slug"):
+        """Returns a slug on a name which is unique within a model's table
+
+        This code suffers a race condition between when a unique
+        slug is determined and when the object with that slug is saved.
+        It's also not exactly database friendly if there is a high
+        likelyhood of common slugs being attempted.
+
+        A good usage pattern for this code would be to add a custom save()
+        method to a model with a slug field along the lines of:
+
+                from django.template.defaultfilters import slugify
+
+                def save(self):
+                    if not self.id:
+                        # replace self.name with your prepopulate_from field
+                        self.slug = SlugifyUniquely(self.name, self.__class__)
+                super(self.__class__, self).save()
+
+        Original pattern discussed at
+        http://www.b-list.org/weblog/2006/11/02/django-tips-auto-populated-fields
+        """
+        suffix = 0
+        potential = base = slugify(value)
+        while True:
+                if suffix:
+                        potential = "-".join([base, str(suffix)])
+                if not model.objects.filter(**{slugfield: potential}).count():
+                        return potential
+                # we hit a conflicting slug, so bump the suffix & try again
+                suffix += 1