~~~
class Page():
def __init__(self, current_page, total_items, items_per_page=10, pagecode_to_show=11):
self.current_page = current_page
self.total_items = total_items
self.items_per_page = items_per_page
self.pagecode_to_show = pagecode_to_show
@property
def total_pages(self):
total_pages, leave = divmod(self.total_items, self.items_per_page)
if leave:
total_pages = total_pages + 1
return total_pages
@property
def get_pages_list(self):
total_pages = self.total_pages
"""總頁數小于要顯示頁碼，則全部顯示"""
if 0 < total_pages < self.pagecode_to_show:
start_page_code = 1
end_page_code = total_pages + 1
else:
"""總頁數大于要顯示頁碼，則部分顯示"""
"""處理首頁部分超出范圍情況"""
if self.current_page <= (self.pagecode_to_show + 1) / 2:
start_page_code = 1
end_page_code = self.pagecode_to_show + 1
elif total_pages - (self.pagecode_to_show + 1) / 2 < self.current_page <= total_pages:
"""處理尾頁部分超出范圍情況"""
start_page_code = total_pages - self.pagecode_to_show + 1
end_page_code = total_pages + 1
else:
"""正常頁碼"""
start_page_code = self.current_page - (self.pagecode_to_show - 1) / 2
end_page_code = self.current_page + (self.pagecode_to_show + 1) / 2
pages_list = [item for item in range(int(start_page_code), int(end_page_code))]
return pages_list
@property
def get_prev_post_page(self):
total_pages = self.total_pages
if self.current_page == 1:
prev_page = 1
post_page = self.current_page + 1
elif self.current_page == total_pages:
prev_page = self.current_page - 1
post_page = total_pages
else:
prev_page = self.current_page - 1
post_page = self.current_page + 1
return prev_page, post_page
@property
def get_items_to_show(self):
items_start = (self.current_page - 1) * self.items_per_page
items_end = self.current_page * self.items_per_page + 1
return int(items_start), int(items_end)
~~~
~~~
@auth
def page(request):
total_items = len(content)
if request.method == 'GET':
items_per_page = request.COOKIES.get('items_per_page')
if items_per_page:
try:
items_per_page = int(items_per_page)
except:
items_per_page = 10
else:
items_per_page = 10
current_page = int(request.GET.get('p', 1))
pg = Page(current_page, total_items, items_per_page)
total_pages = pg.total_pages
items_start, items_end = pg.get_items_to_show
items_to_show = content[items_start:items_end]
pages_list = pg.get_pages_list
prev_page, post_page = pg.get_prev_post_page
return render(request, 'page.html', {
'items_to_show': items_to_show,
'pages_list': pages_list,
'current_page': current_page,
'prev_page': prev_page,
'post_page': post_page,
'total_pages': total_pages,
})
~~~
