89 lines
2.4 KiB
Python
89 lines
2.4 KiB
Python
import re
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import uuid
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from functools import lru_cache
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class UUIDObj:
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__slots__ = ('_raw',)
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def __init__(self, val):
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if val is None:
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self._raw = None
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elif isinstance(val, UUIDObj):
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self._raw = val._raw
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elif isinstance(val, uuid.UUID):
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self._raw = val
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elif isinstance(val, bytes):
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if len(val) != 16:
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raise ValueError(
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'UUIDObj expects 16-byte bytes, got %d bytes' % len(val)
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)
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self._raw = uuid.UUID(bytes=val)
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elif isinstance(val, str):
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self._raw = uuid.UUID(val)
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else:
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self._raw = uuid.UUID(str(val))
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@property
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def str(self):
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if self._raw is None:
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return None
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return str(self._raw)
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@property
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def bytes(self):
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if self._raw is None:
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return None
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return self._raw.bytes
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@property
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def uuid(self):
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return self._raw
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def __str__(self):
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return self.str or ''
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def __repr__(self):
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return f'UUIDObj({self.str})'
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def __eq__(self, other):
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if isinstance(other, UUIDObj):
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return self._raw == other._raw
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if isinstance(other, uuid.UUID):
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return self._raw == other
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if isinstance(other, str):
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return self.str == other
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if isinstance(other, bytes) and len(other) == 16:
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return self.bytes == other
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return NotImplemented
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def __hash__(self):
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return hash(self._raw)
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def __bool__(self):
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return self._raw is not None
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def __len__(self):
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# UUID 固定 16 字节；空值返回 0
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return 16 if self._raw is not None else 0
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@lru_cache(maxsize=1)
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def _GetUserModel():
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"""动态获取 User 模型——保持 SDK 独立性，不硬依赖 gvsds 内部模块。
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回退顺序：
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1. gvsdsdk.User（抽象基类，会触发 LookupError）
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2. 业务子项目中的具体 User 子类（users.User / core.User）
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使用 lru_cache 缓存避免热路径重复调用 apps.get_model()。
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测试中如需重置缓存，调用 _GetUserModel.cache_clear()。
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"""
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from django.apps import apps
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for app_label in ('gvsdsdk', 'users', 'core'):
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try:
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return apps.get_model(app_label, 'User')
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except LookupError:
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continue
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raise LookupError("未找到 User 模型，请在业务子项目中定义 User 子类")
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