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95 lines
2.8 KiB
95 lines
2.8 KiB
# -*- coding: utf-8 -*-
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#
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import uuid
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from abc import abstractmethod
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class BaseBackend:
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@classmethod
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@abstractmethod
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def filter(cls, username=None, assets=None, latest=True, prefer=None, prefer_id=None):
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"""
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:param username: 用户名
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:param assets: <Asset>对象
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:param latest: 是否是最新记录
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:param prefer: 优先使用
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:param prefer_id: 使用id
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:return: 元素为<AuthBook>的可迭代对象(<list> or <QuerySet>)
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"""
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pass
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class AssetUserQuerySet(list):
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def order_by(self, *ordering):
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_ordering = []
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reverse = False
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for i in ordering:
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if i[0] == '-':
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reverse = True
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i = i[1:]
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_ordering.append(i)
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self.sort(key=lambda obj: [getattr(obj, j) for j in _ordering], reverse=reverse)
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return self
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def filter_in(self, kwargs):
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in_kwargs = {}
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queryset = []
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for k, v in kwargs.items():
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if len(v) == 0:
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return self
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if k.find("__in") >= 0:
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_k = k.split('__')[0]
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in_kwargs[_k] = v
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else:
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in_kwargs[k] = v
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for k in in_kwargs:
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kwargs.pop(k, None)
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if len(in_kwargs) == 0:
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return self
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for i in self:
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matched = False
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for k, v in in_kwargs.items():
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attr = getattr(i, k, None)
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# 如果属性或者value中是uuid,则转换成string
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if isinstance(v[0], uuid.UUID):
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v = [str(i) for i in v]
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if isinstance(attr, uuid.UUID):
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attr = str(attr)
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if attr in v:
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matched = True
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if matched:
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queryset.append(i)
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return AssetUserQuerySet(queryset)
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def filter_equal(self, kwargs):
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def filter_it(obj):
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wanted = []
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real = []
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for k, v in kwargs.items():
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wanted.append(v)
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value = getattr(obj, k, None)
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if isinstance(value, uuid.UUID):
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value = str(value)
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real.append(value)
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return wanted == real
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kwargs = {k: v for k, v in kwargs.items() if k.find('__in') == -1}
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if len(kwargs) > 0:
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queryset = AssetUserQuerySet([i for i in self if filter_it(i)])
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else:
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queryset = self
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return queryset
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def filter(self, **kwargs):
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queryset = self.filter_in(kwargs).filter_equal(kwargs)
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return queryset
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def distinct(self):
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items = list(set(self))
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self[:] = items
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return self
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def __or__(self, other):
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self.extend(other)
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return self
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