Presentación hecha en el Encuentro Linux 2008 <http://2008.encuentrolinux.cl/>

2. ¿Python? ¿Django?

3. Python is an experiment in how much freedom programmers need...

5. Django

6. Simple

7. Flexible

8. Pragmático

9. Models Templates

10. Models Templates Forms Auth

11. Models Templates Admin Forms Auth

12. Models Templates Admin Forms Auth i18n

13. Models Templates Admin Forms Auth i18n GIS

14. Models Templates Admin Forms Auth i18n GIS Comments DataBrowse Caching

15. Models Templates Admin Forms Auth i18n GIS Comments DataBrowse Syndication Sitemaps Caching

16. Models Templates Admin Forms Auth i18n GIS Comments DataBrowse Syndication Sitemaps django-evolution django-registration django-jython django-authopenid django-tagging django-command-extensions google-app-engine-django django-search django-contact-form django-contact-form django-bookmarks django-photologue django-timezones django-profile django-mptt Caching Pinax Satchmo

17. Eehhh...

18. Alto!

19. Código > Blabla

21. Proyecto: “eldemo” App: “elinux”

22. 1. Modelos

23. # eldemo/elinux/models.py: from django.db import models from datetime import date class Noticia(models.Model): fecha = models.DateField( default=date.today) titulo = models.CharField(max_length=80) contenido = models.TextField()

24. class Expositor(models.Model): nombre = models.CharField(max_length=80, unique=True) foto = models.ImageField( upload_to=&quot;fotos&quot;) resena = models.TextField(null=True, blank=True) invitado = models.BooleanField()

25. class Charla(models.Model): titulo = models.CharField(max_length=120, unique=True) expositor = models.ForeignKey(Expositor)

26. ¿SQL?

27. ¿SQL? R: Lo genera Django

28. BEGIN; CREATE TABLE &quot;elinux_noticia&quot; ( &quot;id&quot; serial NOT NULL PRIMARY KEY, &quot;titulo&quot; varchar(80) NOT NULL, &quot;contenido&quot; text NOT NULL ) ; CREATE TABLE &quot;elinux_expositor&quot; ( &quot;id&quot; serial NOT NULL PRIMARY KEY, &quot;nombre&quot; varchar(80) NOT NULL UNIQUE, &quot;foto&quot; varchar(100) NOT NULL, &quot;resena&quot; text NULL ) ; CREATE TABLE &quot;elinux_charla&quot; ( &quot;id&quot; serial NOT NULL PRIMARY KEY, &quot;titulo&quot; varchar(120) NOT NULL UNIQUE, &quot;expositor_id&quot; integer NOT NULL REFERENCES &quot;elinux_expositor&quot; (&quot;id&quot;) DEFERRABLE INITIALLY DEFERRED ) ; CREATE INDEX &quot;elinux_charla_expositor_id&quot; ON &quot;elinux_charla&quot; (&quot;expositor_id&quot;); COMMIT;

29. # Python: class Charla(models.Model): titulo = models.CharField(max_length=120, unique=True) expositor = models.ForeignKey(Expositor) -- SQL: CREATE TABLE &quot;elinux_charla&quot; ( &quot;id&quot; serial NOT NULL PRIMARY KEY, &quot;titulo&quot; varchar(120) NOT NULL UNIQUE, &quot;expositor_id&quot; integer NOT NULL REFERENCES &quot;elinux_expositor&quot; (&quot;id&quot;) DEFERRABLE INITIALLY DEFERRED ); CREATE INDEX &quot;elinux_charla_expositor_id&quot; ON &quot;elinux_charla&quot; (&quot;expositor_id&quot;);

30. Bonus

31. from django.contrib import admin from elinux.models import Noticia, Expositor, Charla admin.site.register(Expositor) admin.site.register(Charla) admin.site.register(Noticia)

40. from django.contrib import admin from elinux.models import Noticia, Expositor, Charla class ExpositorAdmin(model.ModelAdmin): search_fields = ('nombre', 'resena') list_filter = ('invitado',) admin.site.register(Expositor, ExpositorAdmin ) admin.site.register(Charla) admin.site.register(Noticia)

44. from django.contrib import admin from elinux.models import Noticia, Expositor, Charla class ExpositorAdmin(model.ModelAdmin): search_fields = ('nombre', 'resena') list_filter = ('invitado',) class CharlaAdmin(model.ModelAdmin): list_display = ('titulo', 'expositor') admin.site.register(Expositor, ExpositorAdmin) admin.site.register(Charla, CharlaAdmin ) admin.site.register(Noticia)

46. from django.contrib import admin from elinux.models import Noticia, Expositor, Charla class ExpositorAdmin(model.ModelAdmin): search_fields = ('nombre', 'resena') list_filter = ('invitado',) class CharlaAdmin(model.ModelAdmin): list_display = ('titulo', 'expositor') class NoticiaAdmin(model.ModelAdmin): date_hierarchy = ('fecha') admin.site.register(Expositor, ExpositorAdmin) admin.site.register(Charla, CharlaAdmin) admin.site.register(Noticia, NoticiaAdmin )

49. 2. Vistas

50. URLs

51. urlpatterns = patterns('eldemo.elinux.views', (r'^$', 'index'), (r'^noticias/$', 'noticias'), (r'^noticias/([0-9]+)/$', 'noticia'), (r'^expositores/invitados/$', 'expositores_invitados'), (r'^expositores/seleccionados/$', 'expositores_seleccionados') )

53. def index(request): noticias = Noticia.objects.all() ultimas_noticias = noticias[:3] return render_to_response( &quot;elinux/index.html&quot;, {'noticias': ultimas_noticias})

54. def noticias(request): noticias = Noticia.objects.all() return render_to_response( &quot;elinux/noticias.html&quot;, {'noticias': noticias}) def noticia(request, id_noticia): noticia = Noticia.objects.get( id=id_noticia) return render_to_response( &quot;elinux/noticia.html&quot;, {'noticia': noticia})

55. def expositores_invitados(request): expositores = Expositor.objects.filter( invitado=True) return render_to_response( &quot;elinux/expositores.html&quot;, {'expositores': expositores})

56. 3. Templates

57. Plantilla Base

58. <body id=&quot;page_bg&quot; class=&quot;red&quot;> <a name=&quot;up&quot; id=&quot;up&quot;></a> <div class=&quot;center&quot;> <div id=&quot;wrapper&quot;> <div id=&quot;top&quot;> <div> <div> <span id=&quot;logo&quot; style=&quot;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://2008.encuentrolinux.cl/templates/linux2008/images/omt_logo_trans.png',sizingMethod='scale');&quot;></span> <span id=&quot;logo_header&quot; style=&quot;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://2008.encuentrolinux.cl/templates/linux2008/images/omt_logo_header.png',sizingMethod='scale');&quot;></span> <span id=&quot;joomla&quot; style=&quot;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://2008.encuentrolinux.cl/templates/linux2008/images/omt_joomla_trans.png',sizingMethod='scale');&quot;></span> </div> </div> </div> <div id=&quot;middle&quot;> <div id=&quot;middle_2&quot;> <div id=&quot;middle_3&quot;> <div id=&quot;middle_4&quot;> <div id=&quot;navigation&quot;> <div id=&quot;centernav&quot;> <span id=&quot;topnav&quot;> <ul id=&quot;mainlevel&quot;> <li class=&quot;red_active_menu&quot;> <a href=&quot;{% url eldemo.elinux.views.index %}&quot;>Inicio</a></li> <ul id=&quot;mainlevel&quot;> <li class=&quot;red&quot;> <a href=&quot;{% url eldemo.elinux.views.noticias %}&quot;> Noticias </a></li> <li class=&quot;red&quot;><a href=&quot;http://2008.encuentrolinux.cl/index.php?option=com_content&amp;task=view&amp;id=24&amp;Itemid=68&quot;>Inscripción</a></li> <li class=&quot;red&quot;><a href=&quot;http://2008.encuentrolinux.cl/index.php?option=com_content&amp;task=view&amp;id=13&amp;Itemid=28&quot;>Participan</a></li> <li class=&quot;red&quot;><a href=&quot;http://2008.encuentrolinux.cl/index.php?option=com_contact&amp;task=view&amp;contact_id=1&amp;Itemid=62&quot;>Contacto</a></li> </ul> </span> <div class=&quot;clr&quot;></div> </div> </div> <div id=&quot;contentarea&quot;> <table border=&quot;0&quot; cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; width=&quot;100%&quot; class=&quot;contentarea&quot;> <tr valign=&quot;top&quot;> <td id=&quot;leftborder&quot;> <div id=&quot;pathway&quot;> <span class=&quot;pathway&quot;> <a href=&quot;http://2008.encuentrolinux.cl/index.php&quot; class=&quot;pathway&quot;>Inicio</a> <img src=&quot;http://2008.encuentrolinux.cl/templates/linux2008/images/arrow.png&quot; border=&quot;0&quot; alt=&quot;arrow&quot; /><!-- TODO: Contacto --> </span> </div> <div id=&quot;mainbody&quot;> {% block content %} {% endblock %} </div> </td> </tr> </table> </div> </div> </div> </div> </div> <div id=&quot;bottom&quot;> <div> <div>Encuentro Linux 2008 / <a href=&quot;index.php?option=com_contact&amp;Itemid=3&quot; target=&quot;_parent&quot;>Contacto</a></div> </div> </div> </div> </div> </body>

59. <!-- Lo Importante: --> ... <div id=&quot;mainbody&quot;> {% block content %}{% endblock %} </div> ...

60. Luego...

61. <!-- index.html --> {% extends &quot;base.html&quot; %} {% block content %} ... {% for noticia in noticias %} <p> <strong>{{ noticia.titulo }}</strong> {{ noticia.contenido|truncatewords:6 }} <a href=&quot;{% url eldemo.elinux.views.noticia noticia.id %}&quot;>(ver más)</a> </p> {% endfor %} {% endblock %}

63. Bonus: Forms

64. from django import forms class ContactForm(forms.Form): nombre = forms .CharField(max_length=200) email = forms .EmailField() titulo = forms .CharField(max_length=200) texto = forms .CharField( widget=forms.Textarea)

65. def contacto(request): if request.method == 'POST': form = ContactForm(request.POST) if form.is_valid(): # TODO: Enviar el mail return HttpResponseRedirect('/') else: form = ContactForm() return render_to_response( &quot;elinux/contacto.html&quot;, {'form': form})

66. {% extends &quot;base.html&quot; %} {% block content %} <form action=&quot;.&quot; method=&quot;POST&quot;> <table> {{ form.as_table }} </table> <input type=&quot;submit&quot; value=&quot;Enviar&quot; > </form> {% endblock %}

70. Más Ideas y Posibilidades...

71. Ubicacion Geográfica de los Asistentes

72. Comentarios

73. Ejecución en la JVM (via Jython)

74. Feeds

75. Feeds (Oh, pero eso es demasiado fácil)

76. from django.contrib.syndication.feeds import Feed from elinux.models import Noticia class NoticiasFeed(Feed): title = &quot;Noticias ELinux&quot; link = &quot;/noticias&quot; description = &quot;Noticias Encuentro Linux 2008&quot; def items(self): return Noticia.objects.all()

78. El framework web para perfeccionistas con deadlines 3. Templates

79. ¿Preguntas?

80. Gracias! leo.soto@gmail.com http://blog.leosoto.com

81. Imágenes (Créditos) Desde Flickr (licenciadas vía Creative Commons): http://www.flickr.com/photos nothingpersonal/252531721/ http://www.flickr.com/photos/d_oracle/349073686/ http://www.flickr.com/photos/d_oracle/350780566/ http://www.flickr.com/photos/spine/2425394931/ http://www.flickr.com/photos/nino63004/2471663305/ http://www.flickr.com/photos/ryanricketts/2295726918/ http://www.flickr.com/photos/twatson/2854156629/ http://www.flickr.com/photos/funkybug/1538454520/ http://www.flickr.com/photos/nirak/331916210/