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Articles tagged with #django
Widely know as N+plus one problem, it’s actually a misnomer. As @adamj.eu’s article neatly summarize with examples (and now my dyslexic mind actually understands it), it’s one query to get a list of N objects that you iterate over. And each iteration...
Websites are inherently read heavy. There are various technologies that help to serve content from CDNs to application level caching. Databases can also be configured with read only replicas. Read queries can routed to these servers alleviating the l...
Because … (1) The query runs every time the application comes up Elastic applications that scale with load, result in an unnecessary DB hits when new instances are added. The effect is multiplicative for each process of your application per pod or co...
Django’s post_save methods allow execution of custom code on an insert or update of a record after the save method is called. The serialized object propagates through the signal handlers as the instance parameter which is eventually committed to the ...
Django's Paginator works to batch your query items into pages. Under the hood it uses lazy slicing which is accomplished in sql by offset and limit. Warning altering the data affects the limit/offset of proceeding paginated pages data ...
Below is the soft delete model you can inherit from. It uses an active field which on delete, it will only set to False and not actually delete the records from the overriden delete method. There is a provision available to actually delete records. I...
