20 Django tips in 10 minutes

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www.thisislevelup.com | @thisislvlup

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www.thisislevelup.com | @thisislvlup

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{% DEBUG %} 1.

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‘debug_toolbar’ 2.

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https:/ /github.com/robhudson/ django-debug-toolbar

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assert False 3.

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if qs.exists(): 4.

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all_users = User.objects.all() if all_users: # Do some stuff

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>>> connection.queries [{'time': '0.002', 'sql': u'SELECT àuth_user`.ìd`, àuth_user`.ùsername`, àuth_user`.`first_name`, àuth_user`.`last_name`, àuth_user`.èmail`, àuth_user`.`password`, àuth_user`.ìs_staff`, àuth_user`.ìs_active`, àuth_user`.ìs_superuser`, àuth_user`.`last_login`, àuth_user`.`date_joined` FROM àuth_user` LIMIT 21'}]

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all_users = User.objects.all() if all_users.exists(): # Do some stuff

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>>> connection.queries [{'time': '0.001', 'sql': u'SELECT (1) AS `a` FROM `auth_user` LIMIT 1'}]

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def get_absolute_url(self): 5.

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{{ blog_post.get_absolute_url }} {{ news_article.get_absolute_url }} {{ user_profile.get_absolute_url }} {{ product.get_absolute_url }} {{ ddd_talk.get_absolute_url }}

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{{ blog_post.get_absolute_url }} {{ news_article.get_absolute_url }} {{ user_profile.get_absolute_url }} {{ product.get_absolute_url }} {{ ddd_talk.get_absolute_url }}

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{% url ddd.views.proﬁle 28 %} 6.

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def get_absolute_url(self): 5.

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def get_absolute_url(self): 5.

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{{ block.super }} 7.

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{% block title %}DDD Scotland{% endblock %}

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{% block title %}{{ block.super }} - {{ article.title }} {% endblock %}

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{% classy_tags %} 8.

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class Hello(Tag): options = Options( Argument('name', required=False, default='world'), 'as', Argument('varname', required=False, resolve=False) ) def render_tag(self, context, name, varname): output = 'hello %s' % name if varname: context[varname] = output return '' return output register.tag(Hello)

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https:/ /github.com/ojii/ django-classy-tags

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from django.core.paginator import Paginator 9.

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all_blog_posts = Post.objects.all() p = Paginator(all_blog_posts, 10) try: cur_page = p.page(request.GET.get('page', 1)) except EmptyPage: raise Http404

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all_blog_posts = Post.objects.all() p = Paginator(all_blog_posts, 10) try: cur_page = p.page(request.GET.get('page', 1)) except EmptyPage: raise Http404

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all_blog_posts = Post.objects.all() p = Paginator(all_blog_posts, 10) try: cur_page = p.page(request.GET.get('page', 1)) except EmptyPage: raise Http404

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@render_to 10.

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def foo(request): bar = Bar.object.all() return render_to_response('template.html', {'bar': bar}, context_instance=RequestContext(request))

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@render_to('template.html') def foo(request): bar = Bar.object.all() return {'bar': bar}

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https:/ /bitbucket.org/ ofﬂine/django-annoying

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@cache_page 11.

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@cache_page(60 * 15) def my_view(request): ...

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{% cache %} 12.

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{% cache 300 nav %} {% show_menu %} {% endcache %}

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__init__.py 13.

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django.contrib.admindocs 14.

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'django_extensions' 15.

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./manage.py shell_plus

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http:/ /code.google.com/p/ django-command-extensions/

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./manage.py graph_models 16.

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pip install django-admin-tools 17.

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https:/ /bitbucket.org/ izi/django-admin-tools/

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localsettings.py 18.

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os.path.dirname() 19.

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SITE_ROOT = os.path.dirname(os.path.realpath(__file__))

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SITE_ROOT = os.path.dirname(os.path.realpath(__file__)) MEDIA_ROOT = os.path.join(SITE_ROOT, 'media')

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SITE_ROOT = os.path.dirname(os.path.realpath(__file__)) MEDIA_ROOT = os.path.join(SITE_ROOT, 'media') TEMPLATE_DIRS = ( os.path.join(SITE_ROOT, 'template') )

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Have fun. 20.

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