diff --git a/euscanwww/djeuscan/managers.py b/euscanwww/djeuscan/managers.py
index f9f6156..0c9b3b6 100644
--- a/euscanwww/djeuscan/managers.py
+++ b/euscanwww/djeuscan/managers.py
@@ -23,6 +23,9 @@ class PackageManager(models.Manager):
         return self.n_versions() - self.n_packaged() - self.n_overlay()
 
     def categories(self):
+        """
+        Returns all the available categories
+        """
         return self.values('category').annotate(
             n_packaged=models.Sum('n_packaged'),
             n_overlay=models.Sum('n_overlay'),
@@ -30,6 +33,9 @@ class PackageManager(models.Manager):
         )
 
     def herds(self):
+        """
+        Returns all the available herds
+        """
         # FIXME: optimize the query, it uses 'LEFT OUTER JOIN' instead of
         # 'INNER JOIN'
         res = self.filter(herds__isnull=False)
@@ -41,6 +47,9 @@ class PackageManager(models.Manager):
         return res
 
     def maintainers(self):
+        """
+        Returns all the available maintainers
+        """
         res = self.filter(maintainers__isnull=False).values(
             'maintainers__id', 'maintainers__name', 'maintainers__email'
         )
@@ -52,5 +61,17 @@ class PackageManager(models.Manager):
         return res
 
     def overlays(self):
+        """
+        Returns the all available overlays
+        """
         res = self.values('version__overlay').exclude(version__overlay='')
         return res.distinct()
+
+    def for_overlay(self, overlay):
+        """
+        Returns packages that belong to the given overlay
+        """
+        packages = self.values(
+            'id', 'name', 'category', 'n_versions', 'n_packaged', 'n_overlay'
+        )
+        return packages.filter(version__overlay=overlay).distinct()
diff --git a/euscanwww/djeuscan/views.py b/euscanwww/djeuscan/views.py
index 3ce67ec..ee618a2 100644
--- a/euscanwww/djeuscan/views.py
+++ b/euscanwww/djeuscan/views.py
@@ -96,10 +96,7 @@ def overlays(request):
 
 @render_to('euscan/overlay.html')
 def overlay(request, overlay):
-    packages = Package.objects.values('id', 'name', 'category',
-                                      'n_versions', 'n_packaged',
-                                      'n_overlay')
-    packages = packages.filter(version__overlay=overlay).distinct()
+    packages = Package.objects.for_overlay(overlay)
     if not packages:
         raise Http404
     return {'overlay': overlay, 'packages': packages}