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81 lines
2.2 KiB
Python
Executable File
81 lines
2.2 KiB
Python
Executable File
import os
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from logging.config import fileConfig
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from alembic import context
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from sqlalchemy import engine_from_config, pool
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# 这是 Alembic 配置对象，提供对正在使用的 .ini 文件中值的访问。
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config = context.config
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# 解析配置文件以进行 Python 日志记录。
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# 这行代码用于设置日志记录器。
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fileConfig(config.config_file_name)
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# 在此处添加模型的 MetaData 对象
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# 以支持 'autogenerate'
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# from myapp import mymodel
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# target_metadata = mymodel.Base.metadata
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# target_metadata = None
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from app.models import SQLModel # noqa
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from app.core.config import settings # noqa
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target_metadata = SQLModel.metadata
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# 根据 env.py 的需要，可以从配置中获取其他值：
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# my_important_option = config.get_main_option("my_important_option")
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# ... 等等。
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def get_url():
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return str(settings.SQLALCHEMY_DATABASE_URI)
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def run_migrations_offline():
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"""在"离线"模式下运行迁移。
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这使用 URL 而不是 Engine 来配置上下文，
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尽管 Engine 在这里也是可以接受的。
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通过跳过 Engine 的创建，我们甚至不需要 DBAPI 可用。
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在这里调用 context.execute() 会将给定的字符串输出到脚本输出。
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"""
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url = get_url()
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context.configure(
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url=url, target_metadata=target_metadata, literal_binds=True, compare_type=True
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)
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with context.begin_transaction():
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context.run_migrations()
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def run_migrations_online():
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"""在"在线"模式下运行迁移。
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在这种情况下，我们需要创建一个 Engine
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并将连接与上下文关联。
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"""
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configuration = config.get_section(config.config_ini_section)
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configuration["sqlalchemy.url"] = get_url()
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connectable = engine_from_config(
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configuration,
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prefix="sqlalchemy.",
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poolclass=pool.NullPool,
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)
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with connectable.connect() as connection:
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context.configure(
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connection=connection, target_metadata=target_metadata, compare_type=True
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)
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with context.begin_transaction():
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context.run_migrations()
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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run_migrations_online()
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