Changes between Version 7 and Version 8 of DjangoSpecifications/Core/SingleInstance

Timestamp:

Mar 24, 2008, 6:09:44 AM (16 years ago)

Author:

David Cramer

Comment:

--

DjangoSpecifications/Core/SingleInstance

@@ -57 +57 @@
         return u"%s (%s)" % (self.title, self.type_of_article.name)
 
-{% for article in Article.objects.all %}
-{{article}}
+{% for article in Article.objects.filter(type=1) %}
+{{ article.type }}
 {% endfor %}
 }}}
+
+In the above example, type is only queried for once, because each iteration it knows that it's already in memory via the instance caching. This is a '''very''' common use case for many developers.
 
 If you have a great number of articles and a smaller number of articletypes the performance/memory hit is staggering because: