20 Django tips in 10 minutes

A lightning talk I gave at a mixed developer conference for those people starting out in Django

Transcript

1. 20 Django tips in 10 minutes
2. www.thisislevelup.com | @thisislvlup
3. www.thisislevelup.com | @thisislvlup
4. {% DEBUG %} 1.
7. ‘debug_toolbar’ 2.
9. https:/ /github.com/robhudson/ django-debug-toolbar
10. assert False 3.
12. if qs.exists(): 4.
13. all_users = User.objects.all() if all_users: # Do some stuff
14. >>> connection.queries [{'time': '0.002', 'sql': u'SELECT `auth_user`.`id`, `auth_user`.`username`, `auth_user`.`first_name`, `auth_user`.`last_name`, `auth_user`.`email`, `auth_user`.`password`, `auth_user`.`is_staff`, `auth_user`.`is_active`, `auth_user`.`is_superuser`, `auth_user`.`last_login`, `auth_user`.`date_joined` FROM `auth_user` LIMIT 21'}]
15. all_users = User.objects.all() if all_users.exists(): # Do some stuff
16. >>> connection.queries [{'time': '0.001', 'sql': u'SELECT (1) AS `a` FROM `auth_user` LIMIT 1'}]
17. def get_absolute_url(self): 5.
18. {{ blog_post.get_absolute_url }}
    {{ news_article.get_absolute_url }}
    {{ user_profile.get_absolute_url }}
    {{ product.get_absolute_url }}
    {{ ddd_talk.get_absolute_url }}
19. {{ blog_post.get_absolute_url }}
    {{ news_article.get_absolute_url }}
    {{ user_profile.get_absolute_url }}
    {{ product.get_absolute_url }}
    {{ ddd_talk.get_absolute_url }}
20. {% url ddd.views.profile 28 %} 6.
21. def get_absolute_url(self): 5.
22. def get_absolute_url(self): 5.
23. {{ block.super }} 7.
24. <title>{% block title %}DDD Scotland{% endblock %}</title>
25. {% block title %}{{ block.super }} - {{ article.title }} {% endblock %}
26. {% classy_tags %} 8.
27. 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)
28. 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)
29. 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)
30. https:/ /github.com/ojii/ django-classy-tags
31. from django.core.paginator import Paginator 9.
32. 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
33. 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
34. 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
35. @render_to 10.
36. def foo(request): bar = Bar.object.all() return render_to_response('template.html', {'bar': bar},
    context_instance=RequestContext(request))
37. @render_to('template.html') def foo(request): bar = Bar.object.all() return {'bar': bar}
38. https:/ /bitbucket.org/ offline/django-annoying
39. @cache_page 11.
40. @cache_page(60 * 15) def my_view(request):
    ...
41. {% cache %} 12.
42. {% cache 300 nav %} {% show_menu %} {% endcache %}
43. __init__.py 13.
47. django.contrib.admindocs 14.
53. 'django_extensions' 15.
54. ./manage.py shell_plus
55. http:/ /code.google.com/p/ django-command-extensions/
56. ./manage.py graph_models 16.
58. pip install django-admin-tools 17.
62. https:/ /bitbucket.org/ izi/django-admin-tools/
63. localsettings.py 18.
65. os.path.dirname() 19.
66. SITE_ROOT = os.path.dirname(os.path.realpath(__file__))
67. SITE_ROOT = os.path.dirname(os.path.realpath(__file__))
    MEDIA_ROOT = os.path.join(SITE_ROOT, 'media')
    
68. 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') )
    
69. Have fun. 20.
70. .,-:;//;:=, . :H@@@MM@M#H/.,+%;, ,/X+ +M@@M@MM%=,-%HMMM@X/, -+@MM; $M@@MH+-,;XMMMM@MMMM@+- ;@M@@M- XM@X;. -+XXXXXHHH@M@M#@/. ,%MM@@MH ,@%= .---=-=:=,. =@#@@@MX ., -%HX$$%%%+; =-./@M@M$ .;@MMMM@MM: X@/ -$MM/ .+MM@@@M$ ,@M@H: :@: . =X#@@@@- ,@@@MMX, . /H- ;@M@M= .H@@@@M@+, %MM+..%#$. /MMMM@MMH/. XM@MH; =; /%+%$XHH@$= , .H@@@@MX, .=--------. -%H.,@@@@@MX, .%MM@@@HHHXX$$$%+- .:$MMX =M@@MM%. =XMMM@MM@MM#H;,-+HMM@M+ /MMMX= =%@M@M#@$-.=$@MM@@@M; %M%= ,:+$+-,/H#MMMMMMM@= =, =++%%%%+/:-.
71. {% delicious_cake %}
73. THANK YOU!
74. THANK YOU! @aaronbassett
75. THANK YOU! @aaronbassett @thisislvlup