42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
from sqlalchemy import Column, BigInteger, DateTime, event
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from sqlalchemy.ext.declarative import declared_attr
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from config.database import Base
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from datetime import datetime
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from utils.common import camel_to_snake
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from id_generator import options, generator
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# https://github.com/yitter/IdGenerator/tree/master/Python
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options = options.IdGeneratorOptions(worker_id=23)
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idgen = generator.DefaultIdGenerator()
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idgen.set_id_generator(options)
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# 第二层基类：包含ID
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class IdBase(Base):
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__abstract__ = True
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id = Column(BigInteger, primary_key=True, index=True)
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@declared_attr
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def __tablename__(cls):
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# 自动把数据库实体类名驼峰转为数据库表名下划线
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return camel_to_snake(cls.__name__)
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# 自动填充id
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@event.listens_for(IdBase, 'before_insert', propagate=True)
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def before_insert_listener(mapper, connection, target):
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if target.id is None:
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target.id = idgen.next_id()
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# 第二层基类：包含ID和审计字段
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class AuditBase(IdBase):
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__abstract__ = True
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create_time = Column(DateTime, nullable=True, default=datetime.now)
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update_time = Column(DateTime, nullable=True, default=datetime.now, onupdate=datetime.now)
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