136 lines
4.2 KiB
Python
136 lines
4.2 KiB
Python
import asyncio
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import os
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from collections.abc import Iterable, MutableMapping
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from logging.config import fileConfig
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from typing import Literal
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from alembic import context
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from alembic.migration import MigrationContext
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from alembic.operations.ops import MigrationScript
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from sqlalchemy import pool
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from sqlalchemy.engine import Connection
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from sqlalchemy.ext.asyncio import async_engine_from_config
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from config.database import ASYNC_SQLALCHEMY_DATABASE_URL, Base
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from utils.import_util import ImportUtil
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# 判断vesrions目录是否存在，如果不存在则创建
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alembic_veresions_path = 'alembic/versions'
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if not os.path.exists(alembic_veresions_path):
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os.makedirs(alembic_veresions_path)
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# 自动查找所有模型
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found_models = ImportUtil.find_models(Base)
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# this is the Alembic Config object, which provides
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# access to the values within the .ini file in use.
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alembic_config = context.config
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# Interpret the config file for Python logging.
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# This line sets up loggers basically.
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if alembic_config.config_file_name is not None:
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fileConfig(alembic_config.config_file_name)
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# add your model's MetaData object here
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# for 'autogenerate' support
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target_metadata = Base.metadata
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# ASYNC_SQLALCHEMY_DATABASE_URL = 'mysql+asyncmy://root:mysqlroot@127.0.0.1:3306/shierfeng-fastapi'
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# other values from the config, defined by the needs of env.py,
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alembic_config.set_main_option('sqlalchemy.url', ASYNC_SQLALCHEMY_DATABASE_URL)
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def run_migrations_offline() -> None:
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"""Run migrations in 'offline' mode.
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This configures the context with just a URL
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and not an Engine, though an Engine is acceptable
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here as well. By skipping the Engine creation
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we don't even need a DBAPI to be available.
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Calls to context.execute() here emit the given string to the
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script output.
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"""
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url = alembic_config.get_main_option('sqlalchemy.url')
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context.configure(
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url=url,
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target_metadata=target_metadata,
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literal_binds=True,
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dialect_opts={'paramstyle': 'named'},
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)
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with context.begin_transaction():
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context.run_migrations()
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def do_run_migrations(connection: Connection) -> None:
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def include_name(
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name: str | None,
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type_: Literal['schema', 'table', 'column', 'index', 'unique_constraint', 'foreign_key_constraint'],
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parent_names: MutableMapping[Literal['schema_name', 'table_name', 'schema_qualified_table_name'], str | None],
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) -> bool:
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if type_ == 'table':
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return name in target_metadata.tables
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return True
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def process_revision_directives(
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context: MigrationContext,
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revision: str | Iterable[str | None] | Iterable[str],
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directives: list[MigrationScript],
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) -> None:
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script = directives[0]
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# 检查所有操作集是否为空
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all_empty = all(ops.is_empty() for ops in script.upgrade_ops_list)
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if all_empty:
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# 如果没有实际变更，不生成迁移文件
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directives[:] = []
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print('❎️ 未检测到模型变更，不生成迁移文件')
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else:
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print('✅️ 检测到模型变更，生成迁移文件')
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context.configure(
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connection=connection,
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target_metadata=target_metadata,
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compare_type=True,
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compare_server_default=True,
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transaction_per_migration=True,
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include_name=include_name,
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process_revision_directives=process_revision_directives,
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)
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with context.begin_transaction():
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context.run_migrations()
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async def run_async_migrations() -> None:
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"""In this scenario we need to create an Engine
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and associate a connection with the context.
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"""
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connectable = async_engine_from_config(
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alembic_config.get_section(alembic_config.config_ini_section, {}),
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prefix='sqlalchemy.',
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poolclass=pool.NullPool,
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)
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async with connectable.connect() as connection:
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await connection.run_sync(do_run_migrations)
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await connectable.dispose()
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def run_migrations_online() -> None:
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"""Run migrations in 'online' mode."""
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asyncio.run(run_async_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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