Custom pager pager

Custom pager

 

 

class Pagination (Object):
     DEF  the __init__ (Self, current_page, ALL_COUNT are, per_page_num = 2, pager_count =. 11 ):
         "" " 
        Package tab data 
        : param current_page: this page 
        : param all_count: Total number of stripes in the database 
        : param the number of data per page is displayed: per_page_num 
        : param pager_count: up to displayed page number 
        
        usage: 
        QuerySet = model.objects.all () 
        page_obj = Pagination (current_page, ALL_COUNT are) 
        page_data = QuerySet [page_obj.start: page_obj.end] 
        acquiring data instead of using the original page_data queryset 
        retrieve a front tab style with page_obj.page_html 
        "" " 
        the try : 
            current_page = int(current_page)
        except Exception as e:
            current_page = 1

        if current_page <1:
            current_page = 1

        self.current_page = current_page

        self.all_count = all_count
        self.per_page_num = per_page_num


        # 总页码
        all_pager, tmp = divmod(all_count, per_page_num)
        if tmp:
            all_pager += 1
        self.all_pager = all_pager

        self.pager_count = pager_count
        self.pager_count_half = int ((pager_count -. 1) / 2 ) 

    @Property 
    DEF Start (Self):
         return (self.current_page -. 1) * self.per_page_num 

    @Property 
    DEF End (Self):
         return self.current_page * self.per_page_num 

    DEF page_html (Self):
         # if the total p <11: 
        IF self.all_pager <= self.pager_count: 
            pager_start =. 1 
            pager_end = self.all_pager. 1 +
         # total p>. 11 
        the else :
             # up on this page if <= page display a page number 11/2
            if self.current_page <= self.pager_count_half:
                pager_start = 1
                pager_end = self.pager_count + 1

            # 当前页大于5
            else:
                # 页码翻到最后
                if (self.current_page + self.pager_count_half) > self.all_pager:
                    pager_end = self.all_pager + 1
                    pager_start = self.all_pager - self.pager_count + 1
                else:
                    pager_start = self.current_page - self.pager_count_half
                    pager_end = self.current_page + self.pager_count_half + 1

        page_html_list = []
        # 添加前面的nav和ul标签
        page_html_list.append('''
                    <nav aria-label='Page navigation>'
                    <ul class='pagination'>
                ''')
        first_page = '<li><a href="?page=%s">首页</a></li>' % (1)
        page_html_list.append(first_page)

        if self.current_page <= 1:
            prev_page = '<li class="disabled"><a href="# "> Previous </a> </ Li> 
            prev_pagethe else'
        := '<li><a href="?page=%s">上一页</a></li>' % (self.current_page - 1,)

        page_html_list.append(prev_page)

        for i in range(pager_start, pager_end):
            if i == self.current_page:
                temp = '<li class="active"><a href="?page=%s">%s</a></li>' % (i, i,)
            else:
                temp = '<li><a href="?page=%s">%s</a></li>' % (i, i,)
            page_html_list.append(temp)

        if self.current_page >= self.all_pager:
            next_page = '<li class="disabled"><a href="#">下一页</a></li>'
        else:
            next_page = '<li><a href="?page=%s">下一页</a></li>' % (self.current_page + 1,)
        page_html_list.append(next_page)

        last_page = '<li><a href="?page=%s">尾页</a></li>' % (self.all_pager,)
        page_html_list.append(last_page)
        # 尾部添加标签
        page_html_list.append('''
                                           </nav>
                                           </ul>
                                       ''')
        return ''.join(page_html_list)

 

 

class Pagination (Object):
     DEF  the __init__ (Self, current_page, ALL_COUNT are, per_page_num = 2, pager_count =. 11 ):
         "" " 
        Package tab data 
        : param current_page: this page 
        : param all_count: Total number of stripes in the database 
        : param the number of data per page is displayed: per_page_num 
        : param pager_count: up to displayed page number 
        
        usage: 
        QuerySet = model.objects.all () 
        page_obj = Pagination (current_page, ALL_COUNT are) 
        page_data = QuerySet [page_obj.start: page_obj.end] 
        acquiring data instead of using the original page_data queryset 
        retrieve a front tab style with page_obj.page_html 
        "" " 
        the try : 
            current_page = int(current_page)
        except Exception as e:
            current_page = 1

        if current_page <1:
            current_page = 1

        self.current_page = current_page

        self.all_count = all_count
        self.per_page_num = per_page_num


        # 总页码
        all_pager, tmp = divmod(all_count, per_page_num)
        if tmp:
            all_pager += 1
        self.all_pager = all_pager

        self.pager_count = pager_count
        self.pager_count_half = int ((pager_count -. 1) / 2 ) 

    @Property 
    DEF Start (Self):
         return (self.current_page -. 1) * self.per_page_num 

    @Property 
    DEF End (Self):
         return self.current_page * self.per_page_num 

    DEF page_html (Self):
         # if the total p <11: 
        IF self.all_pager <= self.pager_count: 
            pager_start =. 1 
            pager_end = self.all_pager. 1 +
         # total p>. 11 
        the else :
             # up on this page if <= page display a page number 11/2
            if self.current_page <= self.pager_count_half:
                pager_start = 1
                pager_end = self.pager_count + 1

            # 当前页大于5
            else:
                # 页码翻到最后
                if (self.current_page + self.pager_count_half) > self.all_pager:
                    pager_end = self.all_pager + 1
                    pager_start = self.all_pager - self.pager_count + 1
                else:
                    pager_start = self.current_page - self.pager_count_half
                    pager_end = self.current_page + self.pager_count_half + 1

        page_html_list = []
        # 添加前面的nav和ul标签
        page_html_list.append('''
                    <nav aria-label='Page navigation>'
                    <ul class='pagination'>
                ''')
        first_page = '<li><a href="?page=%s">首页</a></li>' % (1)
        page_html_list.append(first_page)

        if self.current_page <= 1:
            prev_page = '<li class="disabled"><a href="# "> Previous </a> </ Li> 
            prev_pagethe else'
        := '<li><a href="?page=%s">上一页</a></li>' % (self.current_page - 1,)

        page_html_list.append(prev_page)

        for i in range(pager_start, pager_end):
            if i == self.current_page:
                temp = '<li class="active"><a href="?page=%s">%s</a></li>' % (i, i,)
            else:
                temp = '<li><a href="?page=%s">%s</a></li>' % (i, i,)
            page_html_list.append(temp)

        if self.current_page >= self.all_pager:
            next_page = '<li class="disabled"><a href="#">下一页</a></li>'
        else:
            next_page = '<li><a href="?page=%s">下一页</a></li>' % (self.current_page + 1,)
        page_html_list.append(next_page)

        last_page = '<li><a href="?page=%s">尾页</a></li>' % (self.all_pager,)
        page_html_list.append(last_page)
        # 尾部添加标签
        page_html_list.append('''
                                           </nav>
                                           </ul>
                                       ''')
        return ''.join(page_html_list)