Django exists() versus DoesNotExist

if User.objects.get(pk=id).exists() This won’t work, so the question is pretty easy to answer: This way is inferior to the ways which do work 🙂 I guess you actually didn’t make a Minimal Complete Verifiable Example and so missed the error when you posted un-verified code. So instead, I suppose you are asking about the difference … Read more

Should data be formatted in the backend or front-end?

Great question. I do a layered MVC-inspired architecture. BACKEND I model (format) the data on the backend in accordance with it’s ‘natural’ order. In other words I follow the internal organization of the data. This is because my APIs are often used by multiple, changing or evolving clients and rewriting the API multiple times or … Read more

Progressive Web App – Service Worker not serving start_URL

Noted from Register A service worker, If we register the service worker file at /example/sw.js, then the service worker would only see fetch events for pages whose URL starts with /example/ (i.e. /example/page1/, /example/page2/). Inline with the shown error and given in this documentation, check the following: Define a start_url property in your manifest.json file. … Read more

What is javascript runtime..? [duplicate]

Chrome’s javascript runtime is Google’s V8 engine which was developed by Google to be used with Google Chrome. It compiles the javascript code to native machine code instead of interpreting bytecode which gives a major performance boost to javascript (which is traditionally very slow compared to other high level languages). Node.js contains libuv to handle … Read more

How to avoid issue related to Google Tag Manger in page speed to improve perfomance?

Google Tag Manager is by definition a performance impediment. Its only purpose is to allow non-technical people to dump random garbage very important third-party scripts on a site. If you bypass GTM by inserting the external tags/scripts that you want on your site directly, it will improve performance immediately. If you can’t do that, you … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)