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Building a web framework: Django's design decisions

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    Building a web framework: Django's design decisions - Presentation Transcript

    1. Building Django Jacob Kaplan-Moss PyCon March 29, 2009 http://jacobian.org/speaking/2009/pycon-designing-django/
    2. History
    3. LJW
    4. Adrian/Simon
    5. lawrence.com Wakarusa 2008 › Find photos Great 'cue. Cheap from the festival beer. View. Log in to here (new photos post › All ads this still coming in) and video week comments. posted here. More to be posted Cornmeal / Hoots & Hellmouth: Steeped in as soon as we dry out... the tradition of legendary acts, this Chicago band uses bluegrass as a springboard for long improvisational work and songs ranging from country and rock to jazz and funk ... School of Wak (Soggy More info Edition) (Ten Million Pounds
    6. “The CMS”
    7. Philosophy
    8. Make development fast
    9. Automate repetitive tasks
    10. Best practices
    11. “ The ink is never dry on these babies. ” — Adrian Holovaty
    12. Choices
    13. Open Source
    14. BSD license
    15. Pragmatism over Methodology
    16. GoF? MVC? TDD?
    17. Snake Oil
    18. “ No silver bullet. ” — Fred Brooks Author of The Mythical Man-Month
    19. The Real World
    20. “ Build cool shit. ” — Rob Curley
    21. Ramifications
    22. “What’s the need?”
    23. No architecture astronauts
    24. Reinventing the wheel
    25. “Magic” over boilerplate
    26. Web development is boring
    27. It should be fun!
    28. APIs should match behavior, not show how they work
    29. Ramifications
    30. It can go too far.
    31. Messy internals
    32. More power in less code
    33. Easier to document
    34. “Full stack”
    35. “Best of breed”
    36. Why full stack?
    37. Lack of choices at the time
    38. “Glued together”
    39. Ramifications
    40. More control
    41. Don’t repeat Zope’s mistakes
    42. “ Innovation happens elsewhere. ” — Bill Joy
    43. Small pieces advance quicker
    44. “Sensible defaults”
    45. “Opinionated Software”
    46. Ego is dangerous
    47. You can’t possibly predict what everyone wants
    48. ... so listen to your users! (this is harder than it sounds)
    49. “One obvious way” over “pluggable components”
    50. Autumn Modeling PDB PyORM SQLAlchemy SQLObject Storm ZODB
    51. Choice is good for experts ...
    52. ... but not good for new users
    53. More beginners
    54. “ Don’t make me think. ” — Steve Krug
    55. “ It seems ... that if choice is good, then more choice is better. The paradox is that this “obvious” truth isn’t true... a point can be reached where, with more choice, people are worse off. ” — Barry Schwartz “The Paradox of Choice”
    56. Ramifications
    57. Consistency
    58. Make complicated things easy
    59. Don’t reinvent the wheel
    60. Set our own pace Skip to end
    61. Choices in the future
    62. Long tail or huge scale?
    63. #2 Yahoo #5 Facebook #8 Wikipedia #16 Photobucket #19 Flickr #20 Comcast #23 Wordpress
    64. Standard | Distance | Phone Number Business Name or Category City, State, ZIP Code or Neighborhoo Set as Default Location Atlanta Dallas Las Vegas New York S Austin Denver Los Angeles Oklahoma City S Baltimore Detroit Louisville Orlando S Boston Houston Memphis Philadelphia S Charlotte Indianapolis Miami Phoenix S Chicago Kansas City Milwaukee Saint Louis M Careers Browse Yellow Pages About YELLOWPAGES.COM Contact Us Site Map Help Adv AT&T AT&T Wireless att.net TollFreeDA.com AnyWho Ingenio Yellow Pages Keen Privacy Policy Terms & Conditions Phone Book Recycling © 2008 YELLOWPAGES.COM LLC. All rights reserved. © 2008 AT&T Intellectual Property. All rights reserved. AT&T, AT&T logo and all other marks containe Some data provided by Localeze and Acxiom. #643 BROWSE STATES Alabama Colorado Hawaii Kansas Massachusetts Montana Alaska Connecticut Idaho Kentucky Michigan Nebraska Arizona Delaware Illinois Louisiana Minnesota Nevada Arkansas Florida Indiana Maine Mississippi New Ham California Georgia Iowa Maryland Missouri New Jers
    65. my All Games Home News Forums WoW Addons WAR Addons B Welcome to Curse. login Curse.com B Signup now to take advantage of amazing Curse.com Features! The new Curse.com si read more Curse.com Beta Curse Network Services Enhance Addons are extens experience. We ha to browse addons World of #1295 Age of C Warhamm
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    70. “Enterprise”
    71. Is this a competition we want?
    72. Backlash
    73. “Rails doesn’t scale” s Maps News Shopping Gmail more ! Advan rails doesn't scale Search Prefe Results 1 - 10 of about 4,680,000 for rails doesn't scale. (0.0 Rails Doesn't Scale? . \"I've heard a few people mention that they heard that Rails doesn't scale stions on how we might alleviate their doubt?\" ... t.com/2008/03/rails-doesnt-scale.html - 31k - Cached - Similar pages Interview with Twitter Developer Alex Payne its: Ruby On Rails Can’t Scale at Brandon Werner // Apr 13, ... the rubber is d, and the thing doesn’t scale on the DB end. ... havior.com/5-question-interview-with-twitter-developer-alex-payne/ - 161k - ilar pages aid Rails doesn’t Scale?” Features
    74. “Django doesn’t ...?” Maps News Shopping Gmail more ! Adv \"django sucks\" Search Pref Results 1 - 10 of about 189 for \"django sucks\". (0 ks eaningless: Django sucks from Alan's clob. [RSS] Picture of the blogger ... o sucks: 21.5 ... nkila/blog/2006/05/21/Django%20sucks.html - 28k - Cached - Similar pages compression sucks phasis: 29.9; Hitman: 7.9. 2006, 8. Misc: 23.8. 2006, 6. DSP progress: 29.6; B is: 19.6; Atari ST audio: 17.6. 2006, 5. Django sucks: 21.5 ... l.fi/~alankila/blog/2007/09/15/jQuery%20compression%20sucks.html - 23k - - Similar pages
    75. Keep out the ego
    76. Invite criticism ... and take it well
    77. Make conscious decisions
    78. Thanks! http://jacobian.org/speaking/2009/pycon-designing-django/ <jacob@jacobian.org>
    79. Photo credits http://flickr.com/photos/noulakaz/418575599/ Lawrence Journal-World (with permission) http://flickr.com/photos/mawari/2091456761/ http://flickr.com/photos/lwr/78032315/ Free Software Foundation (GDFL license) http://flickr.com/photos/foox404/640768235/ http://flickr.com/photos/petereed/496392956/ Poul-Henning Kamp (Beerware license) http://flickr.com/photos/ppdigital/2327942088/ http://flickr.com/photos/ognam/252251866/ NASA (public domain) http://flickr.com/photos/summitcheese/197359430/ http://flickr.com/photos/dullhunk/412756798/ http://flickr.com/photos/mathoov/19172893/ http://flickr.com/photos/kandyjaxx/98984009/ http://flickr.com/photos/jdlasica/1681114312/ http://flickr.com/photos/trp0/127771914/ http://flickr.com/photos/andih/345556778/ http://flickr.com/photos/altemark/304078711/ http://flickr.com/photos/simon/351253/ http://flickr.com/photos/yuan2003/733770226/ http://flickr.com/photos/mworrell/266913194/ http://flickr.com/photos/number13001/247125164/ http://flickr.com/photos/ocms/2535068094/ http://flickr.com/photos/iainr/61917036/ http://flickr.com/photos/s_v_p/5869861/ http://flickr.com/photos/dannyman/958602998/ http://flickr.com/photos/dhammza/110422065/ http://flickr.com/photos/xerones/31671892/ http://flickr.com/photos/martinlabar/2832969149/ http://flickr.com/photos/hercules/118434343/ http://flickr.com/photos/kt/418938142/ http://flickr.com/photos/shyha/225517137/ http://flickr.com/photos/donkeycart/2477069275/ http://flickr.com/photos/stee/154686864/ http://flickr.com/photos/therefore/19256103/ http://flickr.com/photos/halfbisqued/2353845688/ http://flickr.com/photos/8011986@N02/2702162140/ http://flickr.com/photos/teflon/128827389/ http://flickr.com/photos/dominiqs/137546402/ http://flickr.com/photos/orinrobertjohn/114430223/ http://flickr.com/photos/druclimb/390916759/ http://flickr.com/photos/articnomad/16153058/ http://flickr.com/photos/poluz/1871578378/ http://flickr.com/photos/cgc/1289366227/ http://flickr.com/photos/zrahen/14469412/ http://flickr.com/photos/pkdouyk/394163975/ http://flickr.com/photos/mihr-i/2741602553/ http://flickr.com/photos/stonebird/2723635311/ http://flickr.com/photos/automatt/226498681/ http://flickr.com/photos/wtlphotos/480714473/ http://flickr.com/photos/kandyjaxx/2012468692/ http://flickr.com/photos/micktwomey/9646019/ http://flickr.com/photos/fatboyke/2668411239/ http://flickr.com/photos/khalid-almasoud/1283997041/ http://flickr.com/photos/zen/12132210/ http://flickr.com/photos/twinleaves/437606968/ http://flickr.com/photos/oskay/404330158/ http://flickr.com/photos/mag3737/1914076277/ http://flickr.com/photos/accordionguy/411908565/ http://flickr.com/photos/cheetleys/295717673/ http://flickr.com/photos/beckytwinley/2451754919/ http://flickr.com/photos/seier/501372541/ http://flickr.com/photos/gullevek/2667764480/ http://flickr.com/photos/devos/6358304/ http://flickr.com/photos/romanlily/2041441584/ 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http://flickr.com/photos/lwr/62382337/ http://flickr.com/photos/niallkennedy/310814303/ http://flickr.com/photos/foresmac/2537548732/ http://flickr.com/photos/lwr/526773135/ http://flickr.com/photos/thomashawk/305370843/ http://flickr.com/photos/12693492@N04/1338136415/ http://flickr.com/photos/lwr/50191251/ http://flickr.com/photos/glynnis/19523654/ http://flickr.com/photos/platinum/6761199/ http://flickr.com/photos/strausser/386412877/ http://flickr.com/photos/loredenizen/14435744 http://flickr.com/photos/30553515@N00/1786871517/ http://flickr.com/photos/wolfhound/258498934/ http://flickr.com/photos/biwook/145765624/ http://flickr.com/photos/skrb/94927584/ http://flickr.com/photos/jef/52133463/ http://flickr.com/photos/rspanton/2305408272/ http://flickr.com/photos/atc/106694427/ http://flickr.com/photos/furiousgeorge81/177926979/ http://flickr.com/photos/saintmurse/68159330/ http://flickr.com/photos/twenty_questions/2192450204/ http://flickr.com/photos/flattop341/212276640/ 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    + Jacob Kaplan-MossJacob Kaplan-Moss, 8 months ago

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