Класс WeekArchiveView (Django 3.2)

from django.views.generic import WeekArchiveView

List of objects published in a given week.

Attributes

  Defined in
allow_empty = False BaseDateListView
allow_empty = True MultipleObjectMixin
allow_future = False DateMixin
content_type = None TemplateResponseMixin
context_object_name = None MultipleObjectMixin
date_field = None DateMixin
date_list_period = 'year' BaseDateListView
extra_context = None ContextMixin
http_method_names = ['get', 'post', 'put', 'patch', 'delete', 'head', 'options', 'trace'] View
model = None MultipleObjectMixin
ordering = None MultipleObjectMixin
page_kwarg = 'page' MultipleObjectMixin
paginate_by = None MultipleObjectMixin
paginate_orphans = 0 MultipleObjectMixin
paginator_class = <class 'django.core.paginator.Paginator'> MultipleObjectMixin
queryset = None MultipleObjectMixin
response_class = <class 'django.template.response.TemplateResponse'> TemplateResponseMixin
template_engine = None TemplateResponseMixin
template_name = None TemplateResponseMixin
template_name_suffix = '_archive_week' WeekArchiveView
template_name_suffix = '_list' MultipleObjectTemplateResponseMixin
uses_datetime_field = <django.utils.functional.cached_property object at 0x7f3e5eb0ad90> DateMixin
week = None WeekMixin
week_format = '%U' WeekMixin
year = None YearMixin
year_format = '%Y' YearMixin

Methods

Main entry point for a request-response process.

@classonlymethod
def as_view(cls, **initkwargs):
    """Main entry point for a request-response process."""
    for key in initkwargs:
        if key in cls.http_method_names:
            raise TypeError(
                'The method name %s is not accepted as a keyword argument '
                'to %s().' % (key, cls.__name__)
            )
        if not hasattr(cls, key):
            raise TypeError("%s() received an invalid keyword %r. as_view "
                            "only accepts arguments that are already "
                            "attributes of the class." % (cls.__name__, key))
    def view(request, *args, **kwargs):
        self = cls(**initkwargs)
        self.setup(request, *args, **kwargs)
        if not hasattr(self, 'request'):
            raise AttributeError(
                "%s instance has no 'request' attribute. Did you override "
                "setup() and forget to call super()?" % cls.__name__
            )
        return self.dispatch(request, *args, **kwargs)
    view.view_class = cls
    view.view_initkwargs = initkwargs
    # take name and docstring from class
    update_wrapper(view, cls, updated=())
    # and possible attributes set by decorators
    # like csrf_exempt from dispatch
    update_wrapper(view, cls.dispatch, assigned=())
    return view
def dispatch(self, request, *args, **kwargs):
    # Try to dispatch to the right method; if a method doesn't exist,
    # defer to the error handler. Also defer to the error handler if the
    # request method isn't on the approved list.
    if request.method.lower() in self.http_method_names:
        handler = getattr(self, request.method.lower(), self.http_method_not_allowed)
    else:
        handler = self.http_method_not_allowed
    return handler(request, *args, **kwargs)
def get(self, request, *args, **kwargs):
    self.date_list, self.object_list, extra_context = self.get_dated_items()
    context = self.get_context_data(
        object_list=self.object_list,
        date_list=self.date_list,
        **extra_context
    )
    return self.render_to_response(context)

Return ``True`` if the view should display empty lists and ``False`` if a 404 should be raised instead.

def get_allow_empty(self):
    """
    Return ``True`` if the view should display empty lists and ``False``
    if a 404 should be raised instead.
    """
    return self.allow_empty

Return `True` if the view should be allowed to display objects from the future.

def get_allow_future(self):
    """
    Return `True` if the view should be allowed to display objects from
    the future.
    """
    return self.allow_future
MultipleObjectMixin

Get the context for this view.

def get_context_data(self, *, object_list=None, **kwargs):
    """Get the context for this view."""
    queryset = object_list if object_list is not None else self.object_list
    page_size = self.get_paginate_by(queryset)
    context_object_name = self.get_context_object_name(queryset)
    if page_size:
        paginator, page, queryset, is_paginated = self.paginate_queryset(queryset, page_size)
        context = {
            'paginator': paginator,
            'page_obj': page,
            'is_paginated': is_paginated,
            'object_list': queryset
        }
    else:
        context = {
            'paginator': None,
            'page_obj': None,
            'is_paginated': False,
            'object_list': queryset
        }
    if context_object_name is not None:
        context[context_object_name] = queryset
    context.update(kwargs)
    return super().get_context_data(**context)
ContextMixin
def get_context_data(self, **kwargs):
    kwargs.setdefault('view', self)
    if self.extra_context is not None:
        kwargs.update(self.extra_context)
    return kwargs

Get the name of the item to be used in the context.

def get_context_object_name(self, object_list):
    """Get the name of the item to be used in the context."""
    if self.context_object_name:
        return self.context_object_name
    elif hasattr(object_list, 'model'):
        return '%s_list' % object_list.model._meta.model_name
    else:
        return None
BaseWeekArchiveView

Return (date_list, items, extra_context) for this request.

def get_dated_items(self):
    """Return (date_list, items, extra_context) for this request."""
    year = self.get_year()
    week = self.get_week()
    date_field = self.get_date_field()
    week_format = self.get_week_format()
    week_choices = {'%W': '1', '%U': '0', '%V': '1'}
    try:
        week_start = week_choices[week_format]
    except KeyError:
        raise ValueError('Unknown week format %r. Choices are: %s' % (
            week_format,
            ', '.join(sorted(week_choices)),
        ))
    year_format = self.get_year_format()
    if week_format == '%V' and year_format != '%G':
        raise ValueError(
            "ISO week directive '%s' is incompatible with the year "
            "directive '%s'. Use the ISO year '%%G' instead." % (
                week_format, year_format,
            )
        )
    date = _date_from_string(year, year_format, week_start, '%w', week, week_format)
    since = self._make_date_lookup_arg(date)
    until = self._make_date_lookup_arg(self._get_next_week(date))
    lookup_kwargs = {
        '%s__gte' % date_field: since,
        '%s__lt' % date_field: until,
    }
    qs = self.get_dated_queryset(**lookup_kwargs)
    return (None, qs, {
        'week': date,
        'next_week': self.get_next_week(date),
        'previous_week': self.get_previous_week(date),
    })
BaseDateListView

Obtain the list of dates and items.

def get_dated_items(self):
    """Obtain the list of dates and items."""
    raise NotImplementedError('A DateView must provide an implementation of get_dated_items()')

Get a queryset properly filtered according to `allow_future` and any extra lookup kwargs.

def get_dated_queryset(self, **lookup):
    """
    Get a queryset properly filtered according to `allow_future` and any
    extra lookup kwargs.
    """
    qs = self.get_queryset().filter(**lookup)
    date_field = self.get_date_field()
    allow_future = self.get_allow_future()
    allow_empty = self.get_allow_empty()
    paginate_by = self.get_paginate_by(qs)
    if not allow_future:
        now = timezone.now() if self.uses_datetime_field else timezone_today()
        qs = qs.filter(**{'%s__lte' % date_field: now})
    if not allow_empty:
        # When pagination is enabled, it's better to do a cheap query
        # than to load the unpaginated queryset in memory.
        is_empty = not qs if paginate_by is None else not qs.exists()
        if is_empty:
            raise Http404(_("No %(verbose_name_plural)s available") % {
                'verbose_name_plural': qs.model._meta.verbose_name_plural,
            })
    return qs

Get the name of the date field to be used to filter by.

def get_date_field(self):
    """Get the name of the date field to be used to filter by."""
    if self.date_field is None:
        raise ImproperlyConfigured("%s.date_field is required." % self.__class__.__name__)
    return self.date_field

Get a date list by calling `queryset.dates/datetimes()`, checking along the way for empty lists that aren't allowed.

def get_date_list(self, queryset, date_type=None, ordering='ASC'):
    """
    Get a date list by calling `queryset.dates/datetimes()`, checking
    along the way for empty lists that aren't allowed.
    """
    date_field = self.get_date_field()
    allow_empty = self.get_allow_empty()
    if date_type is None:
        date_type = self.get_date_list_period()
    if self.uses_datetime_field:
        date_list = queryset.datetimes(date_field, date_type, ordering)
    else:
        date_list = queryset.dates(date_field, date_type, ordering)
    if date_list is not None and not date_list and not allow_empty:
        raise Http404(
            _("No %(verbose_name_plural)s available") % {
                'verbose_name_plural': queryset.model._meta.verbose_name_plural,
            }
        )
    return date_list

Get the aggregation period for the list of dates: 'year', 'month', or 'day'.

def get_date_list_period(self):
    """
    Get the aggregation period for the list of dates: 'year', 'month', or
    'day'.
    """
    return self.date_list_period

Get the next valid week.

def get_next_week(self, date):
    """Get the next valid week."""
    return _get_next_prev(self, date, is_previous=False, period='week')

Get the next valid year.

def get_next_year(self, date):
    """Get the next valid year."""
    return _get_next_prev(self, date, is_previous=False, period='year')
BaseDateListView

Return the field or fields to use for ordering the queryset; use the date field by default.

def get_ordering(self):
    """
    Return the field or fields to use for ordering the queryset; use the
    date field by default.
    """
    return '-%s' % self.get_date_field() if self.ordering is None else self.ordering
MultipleObjectMixin

Return the field or fields to use for ordering the queryset.

def get_ordering(self):
    """Return the field or fields to use for ordering the queryset."""
    return self.ordering

Get the number of items to paginate by, or ``None`` for no pagination.

def get_paginate_by(self, queryset):
    """
    Get the number of items to paginate by, or ``None`` for no pagination.
    """
    return self.paginate_by

Return the maximum number of orphans extend the last page by when paginating.

def get_paginate_orphans(self):
    """
    Return the maximum number of orphans extend the last page by when
    paginating.
    """
    return self.paginate_orphans

Return an instance of the paginator for this view.

def get_paginator(self, queryset, per_page, orphans=0,
                  allow_empty_first_page=True, **kwargs):
    """Return an instance of the paginator for this view."""
    return self.paginator_class(
        queryset, per_page, orphans=orphans,
        allow_empty_first_page=allow_empty_first_page, **kwargs)

Get the previous valid week.

def get_previous_week(self, date):
    """Get the previous valid week."""
    return _get_next_prev(self, date, is_previous=True, period='week')

Get the previous valid year.

def get_previous_year(self, date):
    """Get the previous valid year."""
    return _get_next_prev(self, date, is_previous=True, period='year')

Return the list of items for this view. The return value must be an iterable and may be an instance of `QuerySet` in which case `QuerySet` specific behavior will be enabled.

def get_queryset(self):
    """
    Return the list of items for this view.
    The return value must be an iterable and may be an instance of
    `QuerySet` in which case `QuerySet` specific behavior will be enabled.
    """
    if self.queryset is not None:
        queryset = self.queryset
        if isinstance(queryset, QuerySet):
            queryset = queryset.all()
    elif self.model is not None:
        queryset = self.model._default_manager.all()
    else:
        raise ImproperlyConfigured(
            "%(cls)s is missing a QuerySet. Define "
            "%(cls)s.model, %(cls)s.queryset, or override "
            "%(cls)s.get_queryset()." % {
                'cls': self.__class__.__name__
            }
        )
    ordering = self.get_ordering()
    if ordering:
        if isinstance(ordering, str):
            ordering = (ordering,)
        queryset = queryset.order_by(*ordering)
    return queryset
MultipleObjectTemplateResponseMixin

Return a list of template names to be used for the request. Must return a list. May not be called if render_to_response is overridden.

def get_template_names(self):
    """
    Return a list of template names to be used for the request. Must return
    a list. May not be called if render_to_response is overridden.
    """
    try:
        names = super().get_template_names()
    except ImproperlyConfigured:
        # If template_name isn't specified, it's not a problem --
        # we just start with an empty list.
        names = []
    # If the list is a queryset, we'll invent a template name based on the
    # app and model name. This name gets put at the end of the template
    # name list so that user-supplied names override the automatically-
    # generated ones.
    if hasattr(self.object_list, 'model'):
        opts = self.object_list.model._meta
        names.append("%s/%s%s.html" % (opts.app_label, opts.model_name, self.template_name_suffix))
    elif not names:
        raise ImproperlyConfigured(
            "%(cls)s requires either a 'template_name' attribute "
            "or a get_queryset() method that returns a QuerySet." % {
                'cls': self.__class__.__name__,
            }
        )
    return names
TemplateResponseMixin

Return a list of template names to be used for the request. Must return a list. May not be called if render_to_response() is overridden.

def get_template_names(self):
    """
    Return a list of template names to be used for the request. Must return
    a list. May not be called if render_to_response() is overridden.
    """
    if self.template_name is None:
        raise ImproperlyConfigured(
            "TemplateResponseMixin requires either a definition of "
            "'template_name' or an implementation of 'get_template_names()'")
    else:
        return [self.template_name]

Return the week for which this view should display data.

def get_week(self):
    """Return the week for which this view should display data."""
    week = self.week
    if week is None:
        try:
            week = self.kwargs['week']
        except KeyError:
            try:
                week = self.request.GET['week']
            except KeyError:
                raise Http404(_("No week specified"))
    return week

Get a week format string in strptime syntax to be used to parse the week from url variables.

def get_week_format(self):
    """
    Get a week format string in strptime syntax to be used to parse the
    week from url variables.
    """
    return self.week_format

Return the year for which this view should display data.

def get_year(self):
    """Return the year for which this view should display data."""
    year = self.year
    if year is None:
        try:
            year = self.kwargs['year']
        except KeyError:
            try:
                year = self.request.GET['year']
            except KeyError:
                raise Http404(_("No year specified"))
    return year

Get a year format string in strptime syntax to be used to parse the year from url variables.

def get_year_format(self):
    """
    Get a year format string in strptime syntax to be used to parse the
    year from url variables.
    """
    return self.year_format
def http_method_not_allowed(self, request, *args, **kwargs):
    logger.warning(
        'Method Not Allowed (%s): %s', request.method, request.path,
        extra={'status_code': 405, 'request': request}
    )
    return HttpResponseNotAllowed(self._allowed_methods())

Handle responding to requests for the OPTIONS HTTP verb.

def options(self, request, *args, **kwargs):
    """Handle responding to requests for the OPTIONS HTTP verb."""
    response = HttpResponse()
    response.headers['Allow'] = ', '.join(self._allowed_methods())
    response.headers['Content-Length'] = '0'
    return response

Paginate the queryset, if needed.

def paginate_queryset(self, queryset, page_size):
    """Paginate the queryset, if needed."""
    paginator = self.get_paginator(
        queryset, page_size, orphans=self.get_paginate_orphans(),
        allow_empty_first_page=self.get_allow_empty())
    page_kwarg = self.page_kwarg
    page = self.kwargs.get(page_kwarg) or self.request.GET.get(page_kwarg) or 1
    try:
        page_number = int(page)
    except ValueError:
        if page == 'last':
            page_number = paginator.num_pages
        else:
            raise Http404(_('Page is not “last”, nor can it be converted to an int.'))
    try:
        page = paginator.page(page_number)
        return (paginator, page, page.object_list, page.has_other_pages())
    except InvalidPage as e:
        raise Http404(_('Invalid page (%(page_number)s): %(message)s') % {
            'page_number': page_number,
            'message': str(e)
        })

Return a response, using the `response_class` for this view, with a template rendered with the given context. Pass response_kwargs to the constructor of the response class.

def render_to_response(self, context, **response_kwargs):
    """
    Return a response, using the `response_class` for this view, with a
    template rendered with the given context.
    Pass response_kwargs to the constructor of the response class.
    """
    response_kwargs.setdefault('content_type', self.content_type)
    return self.response_class(
        request=self.request,
        template=self.get_template_names(),
        context=context,
        using=self.template_engine,
        **response_kwargs
    )

Initialize attributes shared by all view methods.

def setup(self, request, *args, **kwargs):
    """Initialize attributes shared by all view methods."""
    if hasattr(self, 'get') and not hasattr(self, 'head'):
        self.head = self.get
    self.request = request
    self.args = args
    self.kwargs = kwargs
def _allowed_methods(self):
    return [m.upper() for m in self.http_method_names if hasattr(self, m)]

Return the start date of the current interval.

def _get_current_week(self, date):
    """Return the start date of the current interval."""
    return date - datetime.timedelta(self._get_weekday(date))

Return the start date of the current interval.

def _get_current_year(self, date):
    """Return the start date of the current interval."""
    return date.replace(month=1, day=1)

Return the start date of the next interval. The interval is defined by start date <= item date < next start date.

def _get_next_week(self, date):
    """
    Return the start date of the next interval.
    The interval is defined by start date <= item date < next start date.
    """
    try:
        return date + datetime.timedelta(days=7 - self._get_weekday(date))
    except OverflowError:
        raise Http404(_("Date out of range"))

Return the start date of the next interval. The interval is defined by start date <= item date < next start date.

def _get_next_year(self, date):
    """
    Return the start date of the next interval.
    The interval is defined by start date <= item date < next start date.
    """
    try:
        return date.replace(year=date.year + 1, month=1, day=1)
    except ValueError:
        raise Http404(_("Date out of range"))

Return the weekday for a given date. The first day according to the week format is 0 and the last day is 6.

def _get_weekday(self, date):
    """
    Return the weekday for a given date.
    The first day according to the week format is 0 and the last day is 6.
    """
    week_format = self.get_week_format()
    if week_format in {'%W', '%V'}:         # week starts on Monday
        return date.weekday()
    elif week_format == '%U':               # week starts on Sunday
        return (date.weekday() + 1) % 7
    else:
        raise ValueError("unknown week format: %s" % week_format)

Convert a date into a datetime when the date field is a DateTimeField. When time zone support is enabled, `date` is assumed to be in the current time zone, so that displayed items are consistent with the URL.

def _make_date_lookup_arg(self, value):
    """
    Convert a date into a datetime when the date field is a DateTimeField.
    When time zone support is enabled, `date` is assumed to be in the
    current time zone, so that displayed items are consistent with the URL.
    """
    if self.uses_datetime_field:
        value = datetime.datetime.combine(value, datetime.time.min)
        if settings.USE_TZ:
            value = timezone.make_aware(value)
    return value

Get the lookup kwargs for filtering on a single date. If the date field is a DateTimeField, we can't just filter on date_field=date because that doesn't take the time into account.

def _make_single_date_lookup(self, date):
    """
    Get the lookup kwargs for filtering on a single date.
    If the date field is a DateTimeField, we can't just filter on
    date_field=date because that doesn't take the time into account.
    """
    date_field = self.get_date_field()
    if self.uses_datetime_field:
        since = self._make_date_lookup_arg(date)
        until = self._make_date_lookup_arg(date + datetime.timedelta(days=1))
        return {
            '%s__gte' % date_field: since,
            '%s__lt' % date_field: until,
        }
    else:
        # Skip self._make_date_lookup_arg, it's a no-op in this branch.
        return {date_field: date}

Constructor. Called in the URLconf; can contain helpful extra keyword arguments, and other things.

def __init__(self, **kwargs):
    """
    Constructor. Called in the URLconf; can contain helpful extra
    keyword arguments, and other things.
    """
    # Go through keyword arguments, and either save their values to our
    # instance, or raise an error.
    for key, value in kwargs.items():
        setattr(self, key, value)