Tech Insights

<p>Django <code>prefetch_related</code> makes an extra query to pre-fill the related objects. If you use <code>prefetch_related</code> 3 times in the same queryset Django ORM will hit the database 4 times to fetch all the results.</p>

<p>When using react-sortable-hoc (specially with bootstrap), if the element being dragged disappears, it may be a z-index issue. Use the component's helperClass: </p>

<p>A community of APIs in Brazil focused on spreading knowledge and mapping existent APIs, does events and has guest posts about APIs</p>

<p>You can easily debounce API calls in redux-saga using the <code>delay</code> helper #debouncing</p>

<p>How to make you django app serverless </p>

<p>It's pretty important understand the exceptions in Django, so give it a try </p>

<p>Share a directory locally with python 3 <code>python -m http.server</code></p>

<p>Django 2.0 and Conditional Aggregations </p>

<p>Trio – Pythonic async I/O for humans and snake people 🐍 </p>

<p>Postgres DB-level for-each with LATERAL: </p>

<p>good hints about CTA's and conversion </p>

<p>Understanding how <code>resolve-url-loader</code>, a Webpack loader that resolves relative paths in url() based on the original source file. works: #how-it-works</p>

<p>On SQL Server, if LEFT OUTER JOIN or INNER JOIN is taking too long to run, try using CROSS APPLY or OUTER APPLY instead </p>

<p>Use <code>django.test.override_settings</code> decorator to override specific settings for test methods</p>

<p>React compound components "give rendering back to the app" </p>

<p>Convert selection to lowercase (or uppercase) in Sublime Text: </p>

<p>Material Design Bootstrap 4 Components </p>

<p>How to test if a logger is called: </p>

<p>UX Research Cheat Sheet: </p>

<p>Easily link related fields on both Django Admin list and change view: </p>

<p>heroku's addons for memcached are not explicitly compatible with Celery as result backends, but you can use them with django-celery-results </p> <p>We created a custom cache for Celery and used [Memcached Cloud]( Our settings for this are looking like:</p> <p>``` INSTALLED_APPS = [ # ... 'django_celery_results', # ... ]</p> <p>CACHES['celery'] = { 'BACKEND': 'django_bmemcached.memcached.BMemcached', 'LOCATION': MEMCACHED_SERVERS, 'OPTIONS': { 'username': MEMCACHED_USERNAME, 'password': MEMCACHED_PASSWORD, } }</p> <p>CELERY_RESULT_BACKEND = 'django-cache' CELERY_CACHE_BACKEND = 'celery' ```</p> <p>Obs.: To use Memcached Cloud on Django you have to follow <a href="#django">these instructions</a></p>

<p>Functional architecture is Ports and Adapters: </p>

<p>Dubsmash: Scaling To 200 Million Users With 3 Engineers </p>

<p>This blog post explains two approaches for dealing with concurrent access in Django models, a pessimistic and an optimistic one </p>