Using a custom template loader at scale

@easyaspython Using a custom template loader at scale Dane Hillard
Lead Web Application Developer 1

@easyaspython >>> help(Dane) 2

@easyaspython Web: https://dane.dev Twitter: @easyaspython GitHub: @daneah 3

@easyaspython 4

@easyaspython 5

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@easyaspython 7

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@easyaspython 9

@easyaspython 10

@easyaspython Enter Django 11

@easyaspython 12 Enter Django

@easyaspython Django approach • Distinct Django projects ◦ For fault
tolerance ◦ For independent performance profiling • A shared core of apps and packages ◦ Authentication ◦ Permissions ◦ Search form ◦ Look and feel 13

@easyaspython 14 Template approach

@easyaspython Changes to look and feel required deployment to every
consumer 15

@easyaspython This was Not Good® 16

@easyaspython Desires • Consumers receive updates without deployment • In
near-real time • Without affecting page load performance 17

@easyaspython A service for templates? 18

@easyaspython ✨ Custom template loader ✨ 19

@easyaspython Custom template loader 20 • What is it? •
How do we use it? • What did it get us? • What’s left?

@easyaspython What is it? 21

@easyaspython 22

@easyaspython 23

@easyaspython 24

@easyaspython django.template.loaders: • filesystem.Loader • app_directories.Loader • cached.Loader 25

@easyaspython 26

@easyaspython 27

@easyaspython How do we use it? 28

@easyaspython 29 get_contents get_template_sources

@easyaspython 30

@easyaspython What did it get us? 31

@easyaspython Desires • ✅ Consumers receive updates without deployment •
✅ In near-real time • ✅ Without affecting page load performance 32

@easyaspython Per-user configuration for testing changes 33

@easyaspython 34

@easyaspython 35

@easyaspython Demo 36

@easyaspython Parallel development of a site-wide redesign 37

@easyaspython Problems we faced 38

@easyaspython The thundering herd 39

@easyaspython cached.Loader configuration 40

@easyaspython File management is clumsy 41

@easyaspython What’s left? 42

@easyaspython Improve adding/removing layouts, cleaning up old templates 43

@easyaspython Leverage version control 44

@easyaspython render( request, {“conf”: “DjangoCon US”}, “thanks.html”, ) 45

Using a custom template loader at scale

Using a custom template loader at scale

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