def get_newest_tasks_or_none(self,start_index=0,size=5):
'''获取最新的任务列表
'''
from tools.shortcut import get_time_now
__start_index = start_index * size
__now = get_time_now()
return self.filter(
is_done=0,
is_assigned=0,
assigned_deadline__lte=__now
)[__start_index:__start_index+size]
def get_recommend_tasks_or_none(self,start_index=0,size=5):
'''获取推荐任务列表（无外部条件的）
'''
from tools.shortcut import get_time_now
__start_index = start_index * size
__now = get_time_now()
return self.filter(
is_done=0,
is_assigned=0,
assigned_deadline__lte=__now
).order_by('-assigned_deadline')[__start_index:__start_index+size]
