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from contextlib import contextmanager
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from django.db import connections
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from common.utils import get_logger
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logger = get_logger(__file__)
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def get_object_if_need(model, pk):
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if not isinstance(pk, model):
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try:
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return model.objects.get(id=pk)
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except model.DoesNotExist as e:
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logger.error(f'DoesNotExist: <{model.__name__}:{pk}> not exist')
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raise e
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return pk
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def get_objects_if_need(model, pks):
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if not pks:
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return pks
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if not isinstance(pks[0], model):
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objs = list(model.objects.filter(id__in=pks))
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if len(objs) != len(pks):
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pks = set(pks)
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exists_pks = {o.id for o in objs}
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not_found_pks = ','.join(pks - exists_pks)
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logger.error(f'DoesNotExist: <{model.__name__}: {not_found_pks}>')
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return objs
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return pks
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def get_objects(model, pks):
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if not pks:
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return pks
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objs = list(model.objects.filter(id__in=pks))
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if len(objs) != len(pks):
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pks = set(pks)
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exists_pks = {o.id for o in objs}
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not_found_pks = pks - exists_pks
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logger.error(f'DoesNotExist: <{model.__name__}: {not_found_pks}>')
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return objs
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# 复制 django.db.close_old_connections, 因为它没有导出，ide 提示有问题
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def close_old_connections():
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for conn in connections.all():
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conn.close_if_unusable_or_obsolete()
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@contextmanager
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def safe_db_connection():
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close_old_connections()
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yield
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close_old_connections()
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