The year ahead (DjangoCon 2012)

BDFL keynote from DjangoCon US (Washington, DC), Sept. 5, 2012.

Transcript

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10. The year ahead
    Adrian Holovaty
    DjangoCon 2012
    

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11. • Alpha: Oct. 1 (feature freeze, branch created)
    • Beta: Nov. 1-ish
    • Release candidate 1: end of November
    • Release candidate 2: early December
    • Final: Christmas!
    Django 1.5 timeline
    

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14. Separate localflavor packages
    django-localflavor-ar
    django-localflavor-at
    django-localflavor-au
    django-localflavor-be
    django-localflavor-br
    django-localflavor-ca
    django-localflavor-ch
    django-localflavor-cl
    django-localflavor-cn
    ...
    

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15. • Django 1.5: Deprecation warning
    • Django 1.6: Separate (bundled) packages,
    shim in repo
    • Django 1.7: HTTP 410 (GONE)
    Deprecation policy
    

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16. >>> from django.contrib import comments
    Traceback (most recent call last):
    File "", line 1, in
    ImportError: What, you actually USE this
    monstrosity?!
    

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17. >>> from django.contrib import databrowse
    Traceback (most recent call last):
    File "", line 1, in
    ImportError: Sorry, it was a cool concept,
    but we never got around to
    finishing it.
    

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18. >>> from django.conf import settings
    >>> settings.PROFANITIES_LIST
    Traceback (most recent call last):
    File "", line 1, in
    FrameworkPlea: Oh, God, please just let
    this setting die already.
    

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19. >>> from django.conf import settings
    >>> settings.SEND_BROKEN_LINK_EMAILS = True
    Traceback (most recent call last):
    File "", line 1, in
    StupidSettingsError: C’mon.
    

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20. >>> from django.conf import settings
    >>> settings.SEND_BROKEN_LINK_EMAILS = True
    Traceback (most recent call last):
    File "", line 1, in
    StupidSettingsError:
    

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21. >>> from django.conf import settings
    >>> settings.AUTH_PROFILE_MODULE
    Traceback (most recent call last):
    File "", line 1, in
    ThatStinks: Code smell detected
    

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22. class User(models.Model):
    username = models.CharField(max_length=30, unique=True)
    first_name = models.CharField(max_length=30, blank=True)
    last_name = models.CharField(max_length=30, blank=True)
    email = models.EmailField(blank=True)
    password = models.CharField(max_length=128)
    is_staff = models.BooleanField(default=False)
    is_active = models.BooleanField(default=True)
    is_superuser = models.BooleanField(default=False)
    last_login = models.DateTimeField(default=timezone.now)
    date_joined = models.DateTimeField(default=timezone.now)
    groups = models.ManyToManyField(Group)
    user_permissions = models.ManyToManyField(Permission)
    

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23. In myapp/models.py
    from django.contrib.auth.models import User
    class UserProfile(models.Model):
    user = models.OneToOneField(User) # required
    # Other fields here
    favorite_animal = models.CharField(max_length=20)
    favorite_beatle = models.CharField(max_length=20)
    

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24. In myapp/models.py
    from django.contrib.auth.models import User
    class UserProfile(models.Model):
    user = models.OneToOneField(User) # required
    # Other fields here
    favorite_animal = models.CharField(max_length=20)
    favorite_beatle = models.CharField(max_length=20)
    In settings.py
    AUTH_PROFILE_MODULE = 'myapp.UserProfile'
    

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25. In myapp/models.py
    from django.contrib.auth.models import User
    class UserProfile(models.Model):
    user = models.OneToOneField(User) # required
    # Other fields here
    favorite_animal = models.CharField(max_length=20)
    favorite_beatle = models.CharField(max_length=20)
    In settings.py
    AUTH_PROFILE_MODULE = 'myapp.UserProfile'
    In views.py
    request.user.get_profile()
    

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26. In myapp/models.py
    class User(models.Model):
    username = models.CharField(max_length=100)
    password = models.CharField(max_length=128)
    favorite_animal = models.CharField(max_length=20)
    favorite_beatle = models.CharField(max_length=20)
    

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27. In myapp/models.py
    class User(models.Model):
    username = models.CharField(max_length=100)
    password = models.CharField(max_length=128)
    favorite_animal = models.CharField(max_length=20)
    favorite_beatle = models.CharField(max_length=20)
    In settings.py
    USER_MODEL = 'myapp.User'
    

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28. In myapp/models.py
    class User(models.Model):
    username = models.CharField(max_length=100)
    password = models.CharField(max_length=128)
    favorite_animal = models.CharField(max_length=20)
    favorite_beatle = models.CharField(max_length=20)
    In settings.py
    USER_MODEL = 'myapp.User'
    In views.py
    request.user
    

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29. • Backwards compatible: fall back to old
    auth.User model
    • Any User model can work with the admin,
    using a clearly defined interface
    Design goals
    

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30. ImportError: Settings cannot be imported, because environment
    variable DJANGO_SETTINGS_MODULE is undefined.
    

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31. def mypage(request, slug):
    obj = MyModel.objects.get(slug=slug)
    return render(request, 'mypage.html', {'obj': obj})
    

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32. def mypage(request, slug):
    obj = MyModel.objects.get(slug=slug)
    return render(request, 'mypage.html', {'obj': obj})
    Connection info?
    

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33. def mypage(request, slug):
    obj = MyModel.objects.get(slug=slug)
    return render(request, 'mypage.html', {'obj': obj})
    Connection info?
    Template location?
    

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34. def mypage(request, slug):
    obj = request.app.query(MyModel).get(slug=slug)
    return request.app.render('mypage.html', {'obj': obj})
    

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35. def mypage(request, slug):
    obj = request.app.query(MyModel).get(slug=slug)
    return request.app.render('mypage.html', {'obj': obj})
    app.query()
    

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36. def mypage(request, slug):
    obj = request.app.query(MyModel).get(slug=slug)
    return request.app.render('mypage.html', {'obj': obj})
    app.query()
    app.render()
    

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37. def mypage(request, slug):
    obj = request.app.query(MyModel).get(slug=slug)
    return request.app.render('mypage.html', {'obj': obj})
    from django import YetAnotherAppClass
    app = YetAnotherAppClass(settings={
    'DATABASES': '...',
    'TEMPLATE_DIRS': ['/path/to/templates'],
    }, rootview=my_urls)
    app.runserver()
    

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38. >>> from django import javascript_stuff
    Traceback (most recent call last):
    File "", line 1, in
    NotImplementedYet: But it’s about time.
    

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39. PJAX
    (P = pushstate)
    

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40. Web framework
    

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41. Web framework
    returns full page
    Web framework
    returns full page
    

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43. Web framework
    returns full page
    Web framework
    returns *diff*
    and changes URL
    

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44. Overview
    

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45. Overview
    Click link
    Trigger Ajax request
    

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46. Overview
    Click link
    Trigger Ajax request
    Server says: “These bits changed”
    

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47. Overview
    Click link
    Trigger Ajax request
    Server says: “These bits changed”
    JavaScript changes the page in place
    

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48. Overview
    Click link
    Trigger Ajax request
    Server says: “These bits changed”
    JavaScript changes the page in place
    URL gets updated with pushstate
    

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49. MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.contrib.pjax.middleware.PjaxMiddleware',
    )
    

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50. http://tinyurl.com/pjaxvideo
    

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51. Real-time
    

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52. Content
    sites
    Applications
    # of sites
    

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53. Content
    sites
    Applications
    # of sites
    

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54. Content
    sites
    Applications
    # of sites
    Move this to the right
    

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55. Thanks for using Django
    Love, Adrian
    

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