97 lines
2.4 KiB
Python
97 lines
2.4 KiB
Python
"""
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Alembic setup and configuration script
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isort:skip_file
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"""
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import logging.config
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import os
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import sys
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from time import sleep
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import alembic
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import sqlalchemy as sa
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# fmt: off
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# make szurubooru module importable
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dir_to_self = os.path.dirname(os.path.realpath(__file__))
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sys.path.append(os.path.join(dir_to_self, *[os.pardir] * 2))
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import szurubooru.config # noqa: E402
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import szurubooru.model.base # noqa: E402
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# fmt: on
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alembic_config = alembic.context.config
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logging.config.fileConfig(alembic_config.config_file_name)
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szuru_config = szurubooru.config.config
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alembic_config.set_main_option("sqlalchemy.url", szuru_config["database"])
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target_metadata = szurubooru.model.Base.metadata
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def run_migrations_offline():
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"""
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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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alembic.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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compare_type=True,
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)
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with alembic.context.begin_transaction():
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alembic.context.run_migrations()
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def run_migrations_online():
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"""
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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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connectable = sa.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=sa.pool.NullPool,
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)
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def connect_with_timeout(connectable, timeout=45):
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dt = 5
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for _ in range(int(timeout / dt)):
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try:
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return connectable.connect()
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except sa.exc.OperationalError:
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sleep(dt)
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return connectable.connect()
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with connect_with_timeout(connectable) as connection:
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alembic.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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)
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with alembic.context.begin_transaction():
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alembic.context.run_migrations()
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if alembic.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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