최근 이벤트에 대한 XML 파일을 동적으로 생성하고 싶습니다. 나중에 파일을 구문 분석 할 수 있습니다. 나는 장고를 사용하려고 시도하고, 장고 객체를 직렬화하고, 다른 방법으로 시도했지만 성공하지 못했다.Django에서 동적으로 생성 된 xml 파일
#views.py
from django.utils.translation import ugettext as _
from django.shortcuts import render_to_response, get_object_or_404
from django.template import RequestContext
from django.contrib.auth.decorators import login_required
from events.models import Event, Attendance
from events.forms import EventForm
from dateutil.parser import parse
from django.core import serializers
from django.http import HttpResponseRedirect, HttpResponse, Http404
from django.views.decorators.http import require_POST
from django.core.urlresolvers import reverse
from django.core import serializers
def recentEvents(request, everyone=True):
"""
Renders a list of ``Event`` instances, which are selected mainly based on
two factors:
The ``everyone`` parameter:
If this is set to False, then we filter down the event list to be only
those events that were created by or attended by one of the people who
the user follows.
If the user is authenticated, the user's events are separated from the
other events.
"""
events = Event.objects.today().filter(latest=True)
if request.user.is_authenticated():
my_events = events.filter(creator=request.user) | events.filter(attendance__user=request.user)
events = events.exclude(creator=request.user).exclude(attendance__user=request.user)
following = request.user.following_set.all().values_list('to_user', flat=True)
else:
my_events = Event.objects.none()
following = None
if not everyone:
events = events.filter(creator__in=following) | events.filter(attendance__user__in=following)
events = events.order_by('-start_date', '-creation_date').distinct()
context = {
'events': events,
'my_events': my_events,
'following': following,
'event_form': EventForm(),
}
return render_to_response('events/recentEvents.html',
context,
context_instance = RequestContext(request)
)
def oldEvents(request, everyone=True):
"""
Renders a list of ``Event`` instances, which are selected mainly based on
one parameter:
``everyone``:
If this is set to False, then we filter down the event list to be only
those events that were created by or attended by one of the people who
the user follows.
"""
events = Event.objects.filter(latest=False) | Event.objects.filter(attendance__user__isnull=False)
if request.user.is_authenticated():
following = list(request.user.following_set.all().values_list('to_user', flat=True))
else:
following = None
if not everyone:
following.append(request.user.id)
events = events.filter(creator__in=following) | events.filter(attendance__user__in=following)
events = events.order_by('-creation_date', '-start_date').distinct()
context = {
'events': events,
'following': following,
}
return render_to_response('events/oldEvents.html',
context,
context_instance = RequestContext(request)
)
def event(request, id):
"""
Render a single event.
"""
event = get_object_or_404(Event, id=id)
return render_to_response('events/event_details.html',
{'event': event},
context_instance = RequestContext(request)
)
def create(request):
"""
Renders a form for creating a new ``Event`` instance, validates against that
form, and creates the new instances.
"""
form = EventForm(request.POST or None)
if form.is_valid():
event = form.save(commit=False)
event.creator = request.user
guessed_date = None
for word in event.description.split():
try:
guessed_date = parse(word)
break
except ValueError:
continue
event.start_date = guessed_date
event.save()
if 'next' in request.POST:
next = request.POST['next']
else:
next = reverse('recentEvents')
if request.is_ajax():
# If the request is AJAX, then render the created event and don't
# create messages for the user.
try:
Attendance.objects.get(event=event, user=request.user)
attending = True
except Attendance.DoesNotExist:
attending = False
return render_to_response('events/event.html', {'event': event,
'request': request, 'attending': attending,
'authenticated': True, 'event_num': 1, 'next': next})
else:
# If the request is not AJAX, then create messages for the user and
# redirect them to the next page.
request.user.message_set.create(
message=_('Your event was posted.'))
return HttpResponseRedirect(next)
if request.is_ajax():
raise Http404
return render_to_response(
'events/create.html',
{'form': form},
context_instance = RequestContext(request)
)
create = login_required(create)
def toggle_attendance(request):
"""
Toggles whether a user is set to attend an event or not.
"""
try:
event_id = int(request.POST['event_id'])
except (KeyError, ValueError):
raise Http404
event = get_object_or_404(Event, id=event_id)
attendance, created = Attendance.objects.get_or_create(user=request.user, event=event)
if not created:
attendance.delete()
if request.is_ajax():
# If the request is AJAX, return JSON representing the new count of
# people who are attending the event.
json = '{"created": %s, "count": %s}' % (created and 'true' or 'false',
event.attendees.all().count())
return HttpResponse(json, mimetype='application/json')
# If the request was not AJAX, create messages for the user.
if created:
request.user.message_set.create(
message=_('You are now attending "%s"') % unicode(event))
else:
request.user.message_set.create(
message=_('You are no longer attending "%s"') % unicode(event))
next = request.POST.get('next', '')
#if not next:
# next = reverse('ev_tonight')
return HttpResponseRedirect(next)
toggle_attendance = require_POST(login_required(toggle_attendance))
#generate xml file
def xml_latest(request):
if request.is_ajax():
#format = 'xml'
mimetype = 'application/xml'
#return serializers.serialize("xml", Event.objects.all())
data = serializers.serialize("xml", Event.objects.all())
#out = open("file.xml", "w")
#xml_serializer.serialize(Event.objects.all(), stream=out)
return HttpResponse(data,mimetype)
else:
return HttpResponse(status=400)
models.py
from datetime import datetime, timedelta
from django.db import models
from django.contrib.auth.models import User
from django.db.models.query import QuerySet
def today():
"""
Returns a tuple of two datetime instances: the beginning of today, and the
end of today.
"""
now = datetime.now()
start = datetime.min.replace(year=now.year, month=now.month,
day=now.day)
end = (start + timedelta(days=1)) - timedelta.resolution
return (start, end)
class EventQuerySet(QuerySet):
"""
A very simple ``QuerySet`` subclass which adds only one extra method,
``today``, which returns only those objects whose ``creation_date`` falls
within the bounds of today.
"""
def today(self):
"""
Filters down to only those objects whose ``creation_date`` falls within
the bounds of today.
"""
return self.filter(creation_date__range=today())
class EventManager(models.Manager):
"""
A very simple ``Manager`` subclass which returns an ``EventQuerySet``
instead of the typical ``QuerySet``. It also includes a proxy for the extra
``today`` method that is provided by the ``EventQuerySet`` subclass.
"""
def get_query_set(self):
"""
return EventQuerySet(self.model)
def today(self):
"""
A proxy method for the extra ``today`` method that is provided by the
``EventQuerySet`` subclass.
"""
return self.get_query_set().today()
class Event(models.Model):
description = models.TextField()
start_date = models.DateTimeField(null=True, blank=True)
creation_date = models.DateTimeField(default=datetime.now)
creator = models.ForeignKey(User, related_name='event_creator_set')
attendees = models.ManyToManyField(User, through='Attendance')
latest = models.BooleanField(default=True)
objects = EventManager()
def __unicode__(self):
"""
Returns the first 80 characters of the description, or less, if the
description is less than 80 characters.
"""
if len(self.description) > 80:
return self.description[:76] + ' ...'
return self.description[:80]
def save(self, **kwargs):
"""
First this updates all events created today by the same creator as this
event, and sets their ``latest`` field to False.
Then, this simply saves the object. Since the default for ``latest`` is
to be set to True, it will be passed through and saved as the latest
event for today by this user.
"""
Event.objects.today().filter(creator=self.creator).update(latest=False)
super(Event, self).save(**kwargs)
def today(self):
"""
Determines whether this event takes place today or not.
"""
(start, end) = today()
return self.creation_date >= start and self.creation_date <= end
def description_size(self):
"""
Useful only for display purposes, this designates a label of 'small',
'medium', or 'large' to the description text size.
"""
if len(self.description) < 120:
return 'small'
elif len(self.description) < 240:
return 'medium'
else:
return 'large'
class Attendance(models.Model):
"""
This is the explicit intermediary model mapping ``User`` instances to
``Event`` instances.
"""
user = models.ForeignKey(User)
event = models.ForeignKey(Event)
registration_date = models.DateTimeField(default=datetime.now)
def __unicode__(self):
return "%s is attending %s" % (self.user.username, self.event)
사람이 도움을 주시겠습니까! 미리 감사드립니다.
정확히 무엇이 문제입니까? – akonsu
우리가 당신의 코드를 갈아 타기를 원한다고해서 우리가 당신을 도울 수는 없지만 당신이 여기에서 새로 왔기 때문에 약간의 수당을 허락합니다. 가장 관련성이 높은 부분 만 알려주세요. –
예, 죄송합니다. 코드는 html 템플릿에 모든 새 이벤트를 게시하고 내가 원하는 모든 것은 나중에 구문 분석 할 수 있도록 xml 파일에 새로 생성 된 모든 이벤트를 저장하는 것입니다. – zta1987