分页组件

内容简介：分页组件

class Pagination(object):

"""
自定义分页组件的使用方法：
    pager_obj = Pagination(request.GET.get('page',1),len(HOST_LIST),request.path_info,request.GET)
    host_list = HOST_LIST[pager_obj.start:pager_obj.end]
    html = pager_obj.page_html()
    return render(request,'hosts.html',{'host_list':host_list,"page_html":html})
"""
 def __init__(self,current_page,total_count,base_url,params,per_page_count=10,max_pager_count=11): try: current_page = int(current_page) except Exception as e: current_page = 1 if current_page <=0: current_page = 1 self.current_page = current_page # 数据总条数 self.total_count = total_count # 每页显示10条数据 self.per_page_count = per_page_count # 页面上应该显示的最大页码 max_page_num, div = divmod(total_count, per_page_count) if div: max_page_num += 1 self.max_page_num = max_page_num # 页面上默认显示11个页码（当前页在中间） self.max_pager_count = max_pager_count self.half_max_pager_count = int((max_pager_count - 1) / 2) # URL前缀 self.base_url = base_url # request.GET import copy params = copy.deepcopy(params) params._mutable = True # 包含当前列表页面所有的搜索条件 # {source:[2,], status:[2], gender:[2],consultant:[1],page:[1]} # self.params[page] = 8 # self.params.urlencode() # source=2&status=2&gender=2&consultant=1&page=8 # href="/hosts/?source=2&status=2&gender=2&consultant=1&page=8" # href="%s?%s" %(self.base_url,self.params.urlencode()) self.params = params @property def start(self): return (self.current_page - 1) * self.per_page_count @property def end(self): return self.current_page * self.per_page_count def page_html(self): # 如果总页数 <= 11 if self.max_page_num <= self.max_pager_count: pager_start = 1 pager_end = self.max_page_num # 如果总页数 > 11 else: # 如果当前页 <= 5 if self.current_page <= self.half_max_pager_count: pager_start = 1 pager_end = self.max_pager_count else: # 当前页 + 5 > 总页码 if (self.current_page + self.half_max_pager_count) > self.max_page_num: pager_end = self.max_page_num pager_start = self.max_page_num - self.max_pager_count + 1 #倒这数11个 else: pager_start = self.current_page - self.half_max_pager_count pager_end = self.current_page + self.half_max_pager_count page_html_list = [] # {source:[2,], status:[2], gender:[2],consultant:[1],page:[1]} # 首页 self.params['page'] = 1 first_page = '<li><a href="%s?%s">首页</a></li>' % (self.base_url,self.params.urlencode(),) page_html_list.append(first_page) # 上一页 
       if self.current_page != 1:
self.params['page']=self.current_page-1
l='<li><a href="%s?%s">上一页</a></li>'% (self.base_url,self.params.urlencode(),)
page_html_list.append(l)
 for i in range(pager_start, pager_end + 1): self.params['page'] = i if i == self.current_page: temp = '<li class="active"><a href="%s?%s">%s</a></li>' % (self.base_url,self.params.urlencode(), i,) else: temp = '<li><a href="%s?%s">%s</a></li>' % (self.base_url,self.params.urlencode(), i,) page_html_list.append(temp) # 下一页 
       if self.current_page < self.max_page_num:
self.params['page']=self.current_page+1
k='<li><a href="%s?%s">下一页</a></li>'% (self.base_url,self.params.urlencode(),)
page_html_list.append(k)

   self.params['page'] = self.max_page_num
# 尾页 self.params['page'] = self.max_page_num last_page = '<li><a href="%s?%s">尾页</a></li>' % (self.base_url, self.params.urlencode(),) page_html_list.append(last_page) return ''.join(page_html_list)

class Pagination(object):    """    自定义分页    """    def __init__(self,current_page,total_count,base_url,params,per_page_count=10,max_pager_count=11):        try:            current_page = int(current_page)        except Exception as e:            current_page = 1        if current_page <=0:            current_page = 1        self.current_page = current_page        # 数据总条数        self.total_count = total_count

# 每页显示10条数据        self.per_page_count = per_page_count

# 页面上应该显示的最大页码        max_page_num, div = divmod(total_count, per_page_count)        if div:            max_page_num += 1        self.max_page_num = max_page_num

# 页面上默认显示11个页码（当前页在中间）        self.max_pager_count = max_pager_count        self.half_max_pager_count = int((max_pager_count - 1) / 2)

# URL前缀        self.base_url = base_url

# request.GET        import copy        params = copy.deepcopy(params)        params._mutable = True        # 包含当前列表页面所有的搜索条件        # {source:[2,], status:[2], gender:[2],consultant:[1],page:[1]}        # self.params[page] = 8        # self.params.urlencode()        # source=2&status=2&gender=2&consultant=1&page=8        # href="/hosts/?source=2&status=2&gender=2&consultant=1&page=8"        # href="%s?%s" %(self.base_url,self.params.urlencode())        self.params = params

@property    def start(self):        return (self.current_page - 1) * self.per_page_count

@property    def end(self):        return self.current_page * self.per_page_count

def page_html(self):        # 如果总页数 <= 11        if self.max_page_num <= self.max_pager_count:            pager_start = 1            pager_end = self.max_page_num        # 如果总页数 > 11        else:            # 如果当前页 <= 5            if self.current_page <= self.half_max_pager_count:                pager_start = 1                pager_end = self.max_pager_count            else:                # 当前页 + 5 > 总页码                if (self.current_page + self.half_max_pager_count) > self.max_page_num:                    pager_end = self.max_page_num                    pager_start = self.max_page_num - self.max_pager_count + 1   #倒这数11个                else:                    pager_start = self.current_page - self.half_max_pager_count                    pager_end = self.current_page + self.half_max_pager_count

page_html_list = []        # {source:[2,], status:[2], gender:[2],consultant:[1],page:[1]}        # 首页        self.params['page'] = 1        first_page = '<li><a href="%s?%s">首页</a></li>' % (self.base_url,self.params.urlencode(),)        page_html_list.append(first_page)

# 上一页        self.params["page"] = self.current_page - 1        if self.params["page"] < 1:            pervious_page = '<li class="disabled"><a href="%s?%s" aria-label="Previous">上一页</span></a></li>' % (            self.base_url, self.params.urlencode())        else:            pervious_page = '<li><a href = "%s?%s" aria-label = "Previous" >上一页</span></a></li>' % (            self.base_url, self.params.urlencode())        page_html_list.append(pervious_page)

# 中间页码        for i in range(pager_start, pager_end + 1):            self.params['page'] = i            if i == self.current_page:                temp = '<li class="active"><a href="%s?%s">%s</a></li>' % (self.base_url,self.params.urlencode(), i,)            else:                temp = '<li><a href="%s?%s">%s</a></li>' % (self.base_url,self.params.urlencode(), i,)            page_html_list.append(temp)

# 下一页        self.params["page"] = self.current_page + 1        if self.params["page"] > self.max_page_num:            self.params["page"] = self.current_page            next_page = '<li class="disabled"><a href = "%s?%s" aria-label = "Next">下一页</span></a></li >' % (            self.base_url, self.params.urlencode())        else:            next_page = '<li><a href = "%s?%s" aria-label = "Next">下一页</span></a></li>' % (            self.base_url, self.params.urlencode())        page_html_list.append(next_page)

# 尾页        self.params['page'] = self.max_page_num        last_page = '<li><a href="%s?%s">尾页</a></li>' % (self.base_url, self.params.urlencode(),)        page_html_list.append(last_page)

return ''.join(page_html_list)

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