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pagetribe .

Django Tagging - 0 views

209.85.173.132/search

django

shared by pagetribe . on 18 Nov 08 - Cached
  • >>> tags = Tag.objects.usage_for_model(Widget, counts=True)
  • [('cheese', 1), ('house', 2), ('thing', 1), ('toast', 1)]
  • pagetribe . on 18 Nov 08
     
    def usage_for_model(self, model, counts=False, min_count=None, filters=None): """ Obtain a list of tags associated with instances of the given Model class. If ``counts`` is True, a ``count`` attribute will be added to each tag, indicating how many times it has been used against the Model class in question. If ``min_count`` is given, only tags which have a ``count`` greater than or equal to ``min_count`` will be returned. Passing a value for ``min_count`` implies ``counts=True``. To limit the tags (and counts, if specified) returned to those used by a subset of the Model's instances, pass a dictionary of field lookups to be applied to the given Model as the ``filters`` argument. """ if filters is None: filters = {} if min_count is not None: counts = True model_table = qn(model._meta.db_table) model_pk = '%s.%s' % (model_table, qn(model._meta.pk.column)) query = """ SELECT DISTINCT %(tag)s.id, %(tag)s.name%(count_sql)s FROM %(tag)s INNER JOIN %(tagged_item)s ON %(tag)s.id = %(tagged_item)s.tag_id INNER JOIN %(model)s ON %(tagged_item)s.object_id = %(model_pk)s %%s WHERE %(tagged_item)s.content_type_id = %(content_type_id)s %%s GROUP BY %(tag)s.id, %(tag)s.name %%s ORDER BY %(tag)s.name ASC""" % { 'tag': qn(self.model._meta.db_table), 'count_sql': counts and (', COUNT(%s)' % model_pk) or '', 'tagged_item': qn(self._get_related_model_by_accessor('items')._meta.db_table), 'model': model_table, 'model_pk': model_pk, 'content_type_id': ContentType.objects.get_for_model(model).pk, } extra_joins = '' extra_criteria = '' min_count_sql
  • pagetribe . on 18 Nov 08
     
    usage_for_model
pagetribe .

Working with models, part 2 - 0 views

www.b-list.org/...working-models

_meta models many-to-many django

shared by pagetribe . on 18 Nov 08 - Cached
  • Every Django model class and every instance of every Django model class has an attribute on it named _meta
  • pagetribe . on 18 Nov 08
     
    Nice info on the usage of _meta on django models.
pagetribe .

Django | 23. Giving models a custom manager | Django Documentation - 0 views

www.djangoproject.com/...custom_managers

django

shared by pagetribe . on 18 Nov 08 - Cached
  • class PersonManager(models.Manager): def get_fun_people(self): return self.filter(fun=True)
  • objects = PersonManager()
pagetribe .

Screencast on many to many relationships between Django models - 0 views

siddhi.blogspot.com/...creencast-on-many-to-many.html

django many-to-many

shared by pagetribe . on 18 Nov 08 - Cached
  • pagetribe . on 18 Nov 08
     
    A nice screencast on many to many relationships. Part of a 3 part series on developing a wiki in django.
pagetribe .

Chapter 10: Advanced Models - 0 views

www.djangobook.com/...chapter10

foreign key

shared by pagetribe . on 15 Jun 09 - Cached
  • With ForeignKey fields, it works the other way, too, but it’s slightly different due to the non-symmetrical nature of the relationship. To get a list of books for a given publisher, use publisher.book_set.all(), like this:
  • Making Changes to a Database Schema
  • Run manage.py sqlall [yourapp]
pagetribe .

Chapter 11: Generic Views - 0 views

www.djangobook.com/...chapter11

generic views django

shared by pagetribe . on 15 Jun 09 - Cached
  • from django.conf.urls.defaults import * from django.views.generic import list_detail from mysite.books.models import Publisher publisher_info = { 'queryset': Publisher.objects.all(), 'template_name': 'publisher_list_page.html', } urlpatterns = patterns('', (r'^publishers/$', list_detail.object_list, publisher_info) )
  • That’s really all there is to it. All the cool features of generic views come from changing the “info” dictionary passed to the generic view.
  • You might have noticed that sample publisher list template stores all the books in a variable named object_list.
  • ...10 more annotations...
  • it isn’t all that “friendly” to template authors: they have to “just know” that they’re dealing with books here.
  • better name
  • publisher_list;
  • 'template_object_name': 'publisher',
  • If you want to present a list of books by a particular publisher, you can use the same technique:
  • Another common need is to filter the objects given in a list page by some key in the URL. Earlier we hard-coded the publisher’s name in the URLconf, but what if we wanted to write a view that displayed all the books by some arbitrary publisher?
  • “wrap” the object_list generic view
  • # Look up the publisher (and raise a 404 if it can't be found). publisher = get_object_or_404(Publisher, name__iexact=name)
  • Notice that in the preceding example we passed the current publisher being displayed in the extra_context. This is usually a good idea in wrappers of this nature; it lets the template know which “parent” object is currently being browsed.
  • Or, you could use a less obvious but shorter version that relies on the fact that Book.objects.all is itself a callable:
pagetribe .

Django | QuerySet API reference | Django Documentation - 0 views

docs.djangoproject.com/...querysets

django queryset api

shared by pagetribe . on 18 Jun 09 - Cached
  • pagetribe . on 18 Jun 09
     
    QuerySet API reference¶
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