Becoming a MutltiLingual SuperHero in Django v2.0

In this talk, we’ll see how we make a language agnostic backend, to serve our app in different languages, based on what language the client wants to communicate in.

We’ll see how to support translation for static data and dynamic data, using various third-party services.

We'll also learn to retain language context in Async tasks ;)

Transcript

1. Becoming a Multilingual Super Hero in Django (v2.0) Sanyam Khurana CuriousLearner ErSanyamKhurana SanyamKhurana.com DjangoCon US 2018
2. def __who_am_i__()
3. def __who_am_i__(): • One of you! A part of the community • CPython contributor and bug triage access on bugs.python.org • Contributor to Gecko Engine, add-ons, Marionette, TaskCluster • GSoC 2018 Mentor for Debian • RGSoC 2016 Mentor
4. The Road to become a Multilingual SuperHero in Django
5. Preparing for Internationalization & Localization
14. Retrieving Language Preference from Client's Request
15. Selecting Language in the order of preference • Language prefix in requested URL (Eg: /en/api/resource) • LANGUAGE_SESSION_KEY key in current user's session • django_language cookie determined by LANGUAGE_COOKIE_NAME • Accept-Language header • Fallback to LANGUAGE_CODE in settings
18. GOTCHA #1 The LocaleMiddleware should always come before CommonMiddleware and after SessionMiddleware
19. What does LocaleMiddleware help with?
20. • Language prefix in requested URL • LANGUAGE_SESSION_KEY key in current user's session • django_language cookie determined by LANGUAGE_COOKIE_NAME • Accept-Language header • LANGUAGE_CODE setting
21. What To Translate?
22. Static String Translations
23. Templates
24. Templates
25. Templates
26. Templates
27. Templates
28. GOTCHA #2 i18n tag should be loaded in every file, even if it extends another file that already has it loaded.
29. All *.py Files
30. • Language prefix in requested URL • LANGUAGE_SESSION_KEY key in current user's session • django_language cookie determined by LANGUAGE_COOKIE_NAME • Accept-Language header • LANGUAGE_CODE setting
32. • Language prefix in requested URL • LANGUAGE_SESSION_KEY key in current user's session • django_language cookie determined by LANGUAGE_COOKIE_NAME • Accept-Language header • LANGUAGE_CODE setting
35. GOTCHA #3 Use ugettext when you need immediate evaluation, else, always prefer ugettext_lazy
36. Generating Translation Files For Static Strings
45. GOTCHA #4 Use makemessages -i venv to exclude generating django.po files for every package in env
46. GOTCHA #5 Django settings uses language name 'zh-cn' makemessages command, use locale name 'zh_CN'
47. Compiling Static String Translations
49. GOTCHA #6 compilemessages command would generate django.mo files for every package if your venv is in project directory
50. GOTCHA #7 Restart wsgi server after compilemessages, otherwise translations won't work
51. Dynamic String Translations
52. Model Fields
55. BONUS
56. Passing Context To Async Tasks
63. Switching Language In Templates
67. Supporting multiple languages in templates
73. GOTCHA #8 Check in django shell if the translations are working with activate and ugettext
75. GOTCHA #9 Some strings are still not being translated Remove line that marks them as fuzzy
76. CONCLUSION
77. Level up your Python Skills Subscribe for updates SanyamKhurana.com/python.html
78. Questions medium.com/@CuriousLearner Sanyam@SanyamKhurana.com CodeMentor.io/CuriousLearner CuriousLearner @ErSanyamKhurana SanyamKhurana.com/python.html