Para perfeccionistas con deadlines

Transcription

1 Para perfeccionistas con deadlines Leo Soto M. Imagemaker IT Encuentro Linux 2008

2 Python? Django?

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

4 ...Too much freedom and nobody can read another's code; too little and expressiveness is endangered - Guido van Rossum (Agosto 1996)

5 Django

6 Simple

7 Flexible

8 Pragmático

9 Models Templates

10 Models Forms Auth Templates

11 Models Forms Admin Templates Auth

12 Models Forms Admin Templates i18n Auth

13 GIS Models Forms Admin Templates i18n Auth

14 Comments GIS Models Forms Caching DataBrowse Admin Templates i18n Auth

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

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

17 Eehhh...

18 Alto!

19 Código > Blabla

20

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

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

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)

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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)

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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)

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46 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)

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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') )

52

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

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

55 def expositores_invitados(request): expositores = Expositor.objects.filter( invitado=true) return render_to_response( "elinux/expositores.html", {'expositores': expositores})

56 3. Templates

57 Plantilla Base

58 <body id="page_bg" class="red"> <a name="up" id="up"></a> <div class="center"> <div id="wrapper"> <div id="top"> <div> <div> <span id="logo" style="filter:progid:dximagetransform.microsoft.alphaimageloader(src=' ');"></span> <span id="logo_header" style="filter:progid:dximagetransform.microsoft.alphaimageloader(src=' e');"></span> <span id="joomla" style="filter:progid:dximagetransform.microsoft.alphaimageloader(src=' le');"></span> </div> </div> </div> <div id="middle"> <div id="middle_2"> <div id="middle_3"> <div id="middle_4"> <div id="navigation"> <div id="centernav"> <span id="topnav"> <ul id="mainlevel"> <li class="red_active_menu"> <a href="{% url eldemo.elinux.views.index %}">Inicio</a></li> <ul id="mainlevel"> <li class="red"> <a href="{% url eldemo.elinux.views.noticias %}"> Noticias </a></li> <li class="red"><a href=" option=com_content&task=view&id=24&itemid=68">inscripciã³n</a></li> <li class="red"><a href=" <li class="red"><a href=" option=com_contact&task=view&contact_id=1&itemid=62">contacto</a></li> </ul> </span> <div class="clr"></div> </div> </div> <div id="contentarea"> <table border="0" cellspacing="0" cellpadding="0" width="100%" class="contentarea"> <tr valign="top"> <td id="leftborder"> <div id="pathway"> <span class="pathway"> <a href=" class="pathway">inicio</a> <img src=" border="0" alt="arrow" /><!-- TODO: Contacto --> </span> </div> <div id="mainbody"> {% block content %} {% endblock %} </div> </td>

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

60 Luego...

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

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63 Bonus: Forms

64 from django import forms class ContactForm(forms.Form): nombre = forms.charfield(max_length=200) = forms. field() 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( "elinux/contacto.html", {'form': form})

66 {% extends "base.html" %} {% block content %} <form action="." method="post"> <table> {{ form.as_table }} </table> <input type="submit" value="enviar" > </form> {% endblock %}

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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 = "Noticias ELinux" link = "/noticias" description = "Noticias Encuentro Linux 2008" def items(self): return Noticia.objects.all()

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78 3. Templates El framework web para perfeccionistas con deadlines

79 Preguntas?

80 Gracias!

81 Imágenes (Créditos) Desde Flickr (licenciadas vía Creative Commons): nothingpersonal/ /