seulcoding

When filter queryset using ManyToManyField, it takes too much sql queries.For avoid this situation, we can use annotate.CountWith django.db.models.Count, you can count number of m2m objects.For example, if want to filter queryset having more than one ManyToManyField called product (for example)from django.db.models import Count ... queryset = queryset.annotate(product_num=Count('product')).filte..

Method 1: Override admin templateIn django admin templates, there’s{% block extrastyle %}{% endblock %} and can add some styles to there.Method 2: Add Media class to ModelAdminIf you want to add css or js for only one ModelAdmin, you can add Media class to ModelAdminclass CustomModelAdmin(admin.ModelAdmin): class Media: js = ('js/admin/my_own_admin.js',) css = { 'all': ('css/admin/my_own_admin.c..

In settings.py, can add CSRF_FAILURE_VIEW='app_name.views.csrf_failure'Then add csrf_failure in your view.def csrf_failure(request, reason=""): ctx = {'message': 'custom message'} return render_to_response(custom_template, ctx) More details in documentation

Just add env = ENV[uwsgi] master = true processes = 2 threads = 2 socket = /tmp/uwsgi.sock chmod-socket = 666 chdir = /var/www/service/my_site/ module = my_site.wsgi home = /home/ubuntu/my_site vacuum = true env = DJANGO_SETTINGS_MODULE=settings_dev uid = www-data gid = www-data # daemonize2 = logs/uwsgi.log

I always use postgres when using django. With PostgreSQL, django supports many features such as Full text search, Arrayfield, and so on.Install MySQL in mac os XCan install esaily by brew.brew install mysql Start MySQLmysql.server start Make database and userFirst, open mysql shellmysql -u root -p Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server versi..

How to upgrade postgres 9.3 to 9.4 in ubuntu1. Create file /etc/apt/sources.list.d/pgdg.listMake /etc/apt/sources.list.d/pgdg.list and add a line below.deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main 2. apt-get updateAfter saving pgdg.list, import repository signing key and update package list.wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | \ sudo apt-key add..

I tried to pg_dump from aws ec2 to local postgres. I run command below, and I encountered version mismatch error.pg_dump -h -U -f pg_dump: server version: 9.4.1; pg_dump version: 9.3.6 pg_dump: aborting because of server version mismatch I found out that ubuntu server has 9.3 postgres and ec2 has 9.4.To solve this problem, I have to upgrade ubuntu postgres to 9.4.Upgrade 9.3 to 9.4 article is He..

Installpip install django-redis ConfigurationAdd CACHES in settings.pyCACHES = { "default": { "BACKEND": "django_redis.cache.RedisCache", "LOCATION": "redis://127.0.0.1:6379/1", "OPTIONS": { "CLIENT_CLASS": "django_redis.client.DefaultClient", } } } Configure session backendIf want to use session backend with django-redis, add SESSION_ENGINE and SESSION_CACHE_ALIAS to settings.pySESSION_ENGINE =..

In django, you can know all logged in users by Session for non-expired sessions.For that, just make get_all_logged_in_users. (maybe in function.py or somewhere else.)# If you use custom user, import it instead of User from django.contrib.auth.models import User from django.contrib.sessions.models import Session from django.utils import timezone def get_all_logged_in_users(): sessions = Session.o..

You can download redis HERE.Just download in redis site above, or using wget.wget http://download.redis.io/releases/redis-4.0.9.tar.gz tar xzf redis-4.0.9.tar.gz cd redis-4.0.9 make After make command done, just run redis withsrc/redis-server Then you can interact using redis-clisrc/redis-cli 127.0.0.1:6379> set foo bar OK 127.0.0.1:6379> get foo "bar" 127.0.0.1:6379> Also, redis provide online ..