Python ObjectPaginator.first_on_page方法代码示例

# 需要导入模块: from django.core.paginator import ObjectPaginator [as 别名]
# 或者: from django.core.paginator.ObjectPaginator import first_on_page [as 别名]
 def list(self, request, queryset, page=None):
     """
     Renders a list of model objects to HttpResponse.
     """
     template_name = '%s/%s_list.html' % (self.template_dir, queryset.model._meta.module_name)
     if self.paginate_by:
         paginator = ObjectPaginator(queryset, self.paginate_by)
         if not page:
             page = request.GET.get('page', 1)
         try:
             page = int(page)
             object_list = paginator.get_page(page - 1)
         except (InvalidPage, ValueError):
             if page == 1 and self.allow_empty:
                 object_list = []
             else:
                 raise Http404
         c = RequestContext(request, {
             '%s_list' % self.template_object_name: object_list,
             'is_paginated': paginator.pages > 1,
             'results_per_page': self.paginate_by,
             'has_next': paginator.has_next_page(page - 1),
             'has_previous': paginator.has_previous_page(page - 1),
             'page': page,
             'next': page + 1,
             'previous': page - 1,
             'last_on_page': paginator.last_on_page(page - 1),
             'first_on_page': paginator.first_on_page(page - 1),
             'pages': paginator.pages,
             'hits' : paginator.hits,
         }, self.context_processors)
     else:
         object_list = queryset
         c = RequestContext(request, {
             '%s_list' % self.template_object_name: object_list,
             'is_paginated': False
         }, self.context_processors)
         if not self.allow_empty and len(queryset) == 0:
             raise Http404
     # Hide unexposed fields
     for obj in object_list:
         self._hide_unexposed_fields(obj, self.expose_fields)
     c.update(self.extra_context)        
     t = self.template_loader.get_template(template_name)
     return HttpResponse(t.render(c), mimetype=self.mimetype)

# 需要导入模块: from django.core.paginator import ObjectPaginator [as 别名]
# 或者: from django.core.paginator.ObjectPaginator import first_on_page [as 别名]
def object_list(request, queryset, paginate_by=None, page=None,
        allow_empty=True, template_name=None, template_loader=loader,
        extra_context=None, context_processors=None, template_object_name='object',
        mimetype=None):
    """
    Generic list of objects.

    Templates: ``<app_label>/<model_name>_list.html``
    Context:
        object_list
            list of objects
        is_paginated
            are the results paginated?
        results_per_page
            number of objects per page (if paginated)
        has_next
            is there a next page?
        has_previous
            is there a prev page?
        page
            the current page
        next
            the next page
        previous
            the previous page
        pages
            number of pages, total
        hits
            number of objects, total
        last_on_page
            the result number of the last of object in the
            object_list (1-indexed)
        first_on_page
            the result number of the first object in the
            object_list (1-indexed)
        page_range:
            A list of the page numbers (1-indexed).
    """
    if extra_context is None: extra_context = {}
    queryset = queryset._clone()
    if paginate_by:
        paginator = ObjectPaginator(queryset, paginate_by)
        if not page:
            page = request.GET.get('page', 1)
        try:
            page_number = int(page)
        except ValueError:
            if page == 'last':
                page_number = paginator.pages
            else:
                # Page is not 'last', nor can it be converted to an int
                raise Http404
        try:
            object_list = paginator.get_page(page_number - 1)
        except InvalidPage:
            if page_number == 1 and allow_empty:
                object_list = []
            else:
                raise Http404
        c = RequestContext(request, {
            '%s_list' % template_object_name: object_list,
            'is_paginated': paginator.pages > 1,
            'results_per_page': paginate_by,
            'has_next': paginator.has_next_page(page_number - 1),
            'has_previous': paginator.has_previous_page(page_number - 1),
            'page': page_number,
            'next': page_number + 1,
            'previous': page_number - 1,
            'last_on_page': paginator.last_on_page(page_number - 1),
            'first_on_page': paginator.first_on_page(page_number - 1),
            'pages': paginator.pages,
            'hits' : paginator.hits,
            'page_range' : paginator.page_range
        }, context_processors)
    else:
        c = RequestContext(request, {
            '%s_list' % template_object_name: queryset,
            'is_paginated': False
        }, context_processors)
        if not allow_empty and len(queryset) == 0:
            raise Http404
    for key, value in extra_context.items():
        if callable(value):
            c[key] = value()
        else:
            c[key] = value
    if not template_name:
        model = queryset.model
        template_name = "%s/%s_list.html" % (model._meta.app_label, model._meta.object_name.lower())
    t = template_loader.get_template(template_name)
    return HttpResponse(t.render(c), mimetype=mimetype)

# 需要导入模块: from django.core.paginator import ObjectPaginator [as 别名]
# 或者: from django.core.paginator.ObjectPaginator import first_on_page [as 别名]
class Paginator(object):
    """
    Much like Django's ``ObjectPaginator`` (which it uses), but always
    represents a specific current page instead of just providing an interface
    to the data. Based on the active page it makes a number of properties
    available which mostly work exactly like the context that the
    ``object_list`` generic view provides.

    ``__init__`` takes the same arguments as ``ObjectPaginator``, plus an
    additional parameter ``page`` to initialize the active page number. It does
    not need to be an int, i.e. it can come directly from ``request.GET``; if
    conversion to an integer fails, a ``Http404`` exception is raised.
    
    You can also later assign to to ``page`` attribute.
    
    >>> items = range(1,6789)
    >>> paginator = Paginator(items, num_per_page=10, page=3)
    >>> paginator.items
    [21, 22, 23, 24, 25, 26, 27, 28, 29, 30]
    >>> paginator.is_paginated
    True
    >>> paginator.results_per_page
    10
    >>> paginator.has_next
    True
    >>> paginator.has_previous
    True
    >>> paginator.page
    3
    >>> paginator.page0
    2
    >>> paginator.next
    4
    >>> paginator.previous
    2
    >>> paginator.last_on_page
    30
    >>> paginator.first_on_page
    21
    >>> paginator.pages
    679
    >>> paginator.hits
    6788
    """
    def __init__(self, *args, **kwargs):
        page = kwargs.pop('page', 1)
        self._paginator = DjangoPaginator(*args, **kwargs)
        
        # Resolve the page number; this is similar to what the Django
        # ``object_list`` generic view is doing.
        try:
            self.page = int(page)
        except ValueError:
            if page == 'last': self.page = self._paginator.pages
            else: raise Http404
        
    def _set_page(self, new_page):
        self.__page = new_page
        try:
            self.object_list = self._paginator.get_page(new_page-1)
        except InvalidPage:
            if new_page != -1: raise Http404
            else: self.object_list = []   # allow empty
        self.items = self.object_list # alias
        # update all exposed info for the new page number
        self.update_attrs()
    def _get_page(self): return self.__page
    page = property(_get_page, _set_page)

    def update_attrs(self):
        """Override in descendants to set custom fields."""
        self.page0 = self.page-1
        self.is_paginated = self._paginator.pages > 1
        self.results_per_page = self._paginator.num_per_page
        self.has_next = self._paginator.has_next_page(self.page-1)
        self.has_previous = self._paginator.has_previous_page(self.page-1)
        self.next = self.page+1
        self.previous = self.page-1
        self.last_on_page = self._paginator.last_on_page(self.page-1)
        self.first_on_page = self._paginator.first_on_page(self.page-1)
        self.pages = self._paginator.pages
        self.hits = self._paginator.hits
        self.page_range = self._paginator.page_range