mirror of
https://github.com/YFGaia/dify-plus.git
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npc0-hue
104 lines
2.8 KiB
Python
104 lines
2.8 KiB
Python
import logging
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import os
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import sys
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from logging.config import fileConfig
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from alembic import context
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from flask import current_app
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USE_TWOPHASE = False
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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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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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fileConfig(config.config_file_name)
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logger = logging.getLogger('alembic.env')
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# add your model's MetaData object here
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# for 'autogenerate' support
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# 将当前目录的父目录(api目录)添加到Python路径中，以便能够导入models模块
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sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
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# 获取当前运行的应用数据库引擎和URL
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def get_engine():
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try:
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return current_app.extensions['sqlalchemy'].db.engine
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except (KeyError, AttributeError):
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return current_app.extensions['migrate'].db.engine
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def get_engine_url():
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try:
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return get_engine().url.render_as_string(hide_password=False).replace(
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'%', '%%')
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except AttributeError:
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return str(get_engine().url).replace('%', '%%')
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# 使用当前应用的数据库URL替换配置文件中的URL
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config.set_main_option('sqlalchemy.url', get_engine_url())
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from models import db
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target_metadata = db.Model.metadata
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# other values from the config, defined by the needs of env.py,
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# can be acquired:
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# my_important_option = config.get_main_option("my_important_option")
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# ... etc.
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def run_migrations_offline():
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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 = 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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version_table="alembic_version_extend",
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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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"""Run migrations in 'online' mode.
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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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# 使用应用的数据库引擎，而不是从配置文件创建
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connectable = get_engine()
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with connectable.connect() as connection:
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context.configure(
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connection=connection,
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target_metadata=target_metadata,
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version_table="alembic_version_extend",
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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() |