from places.models import Place
class News(models.Model):
    place=models.ForeignKey(Place)
    title=models.CharField(max_length=50)
    short_text=models.TextField()
    full_text=models.TextField()

class PlaceCategory(models.Model):
    category=models.CharField(max_length=50)
class Place(models.Model):
    category=models.ForeignKey(PlaceCategory)
    name=models.CharField(max_length=50)

from places.models import Place, PlaceCategory
from news.models import News
from django.http import HttpResponse
from django.template import Context, Template
def all_categories_view(request):
    t=Template('''
    {% for category in categories %}
        <a href="{% url places.views.place_of_category category.category %}">{{ category.category }}</a><hr>
    {% endfor %}
    ''')
    categories=PlaceCategory.objects.all()
    c=Context({'categories':categories})
    return HttpResponse(t.render(c))
def place_of_category(request, category_name):
    t=Template('''
    {% for place in places %}
        <a href="{% url places.views.news_of_place place.name %}">{{ place.name }}</a>
    {% endfor %}
    ''')
    places=Place.objects.filter(category__category=category_name)
    c=Context({'places':places})
    return HttpResponse(t.render(c))
def news_of_place(request, place_name):
    t=Template('''
    {% for new in news %}
        <h3>{{ new.title }}</h3>
    {% endfor %}
    ''')
    news=News.objects.filter(place__name=place_name)
    c=Context({'news':news})
    return HttpResponse(t.render(c))

urlpatterns = patterns('',
    url(r'^admin/', include(admin.site.urls)),
    url(r'^$', all_categories_view, name='zzz_view'),
    url(r'^(?P<category_name>\w+)/$', place_of_category, name='xxx_view'),
    url(r'^(?P<category_name>\w+)/(?P<place_name>\w+)/$', news_of_place, name='ccc_view'),
)

 url(r'^(?P<category_name>\w+)/(?P<place_name>\w+)/$', news_of_place, name='ccc_view'),

 """<a href="{% url places.views.news_of_place place.name %}">{{ place.name }}</a>"""

def place_of_category(request, category_name):
    t=Template('''
    {% for place in places %}
        <a href="{% url ccc_view category_name=category_name place_name=place.name %}">{{ place.name }}</a>
    {% endfor %}
    ''')
    places=Place.objects.filter(category__category=category_name)
    c=Context({'places':places, 'category_name':category_name})
    return HttpResponse(t.render(c))

url(r'^(?P<category_name>[^/]+)/(?P<place_name>[^/]+)/$', news_of_place, name='ccc_view'),

 url(r'^$', all_categories_view, name='zzz_view'),
 url(r'^(?P<category_name>[^/]+)/$', place_of_category, name='xxx_view'),
 url(r'^(?P<category_name>[^/]+)/(?P<place_name>[^/]+)/$', news_of_place, name='ccc_view')