复制代码代码如下:def sa_obj_to_dict(obj, filtrate=None, rename=None):"""sqlalchemy 对象转为dict:param filtrate: 过滤的字段:type filtrate: list or tuple:param rename: 需要改名的,改名在过滤之后处理, key为原来对象的属性名称，value为需要更改名称:type rename: dict:rtype: dict"""if isinstance(obj.__class__, DeclarativeMeta):# an SQLAlchemy class#该类的相关类型，即直接与间接父类cla = obj.__class__.__mro__#过滤不需要的父类cla = filter(lambda c: hasattr(c, '__table__'), filter(lambda c: isinstance(c, DeclarativeMeta), cla)) columns = []map(lambda c: columns.extend(c.__table__.columns), cla[::-1])# columns = obj.__table__.columns if filtrate and isinstance(filtrate, (list, tuple)):fields = dict(map(lambda c: (c.name, getattr(obj, c.name)), filter(lambda c: not c.name in filtrate, columns))) else:fields = dict(map(lambda c: (c.name, getattr(obj, c.name)), columns))# fields = dict([(c.name, getattr(obj, c.name)) for c in obj.__table__.columns]) if rename and isinstance(rename, dict):#先移除key和value相同的项_rename = dict(filter(lambda (k, v): str(k) != str(v), rename.iteritems()))#如果原始key不存在，那么新的key对应的值默认为None#如果新的key已存在于原始key中，那么原始key的值将被新的key的值覆盖# map(lambda (k, v): fields.setdefault(v, fields.pop(k, None)), _rename.iteritems()) map(lambda (k, v): fields.update({v: fields.pop(k, None)}), _rename.iteritems())#return fields else:return {}
sqlalchemy对象转dict的示例
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