74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
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"""Alembic environment, wired to Flask-Migrate."""
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import logging
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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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config = context.config
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fileConfig(config.config_file_name)
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logger = logging.getLogger("alembic.env")
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def get_engine():
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try:
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# Flask-SQLAlchemy < 3.x
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return current_app.extensions["migrate"].db.get_engine()
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except (TypeError, AttributeError):
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# Flask-SQLAlchemy >= 3.x
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return current_app.extensions["migrate"].db.engine
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def get_engine_url() -> str:
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try:
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return get_engine().url.render_as_string(hide_password=False).replace("%", "%%")
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except AttributeError:
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return str(get_engine().url).replace("%", "%%")
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config.set_main_option("sqlalchemy.url", get_engine_url())
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target_db = current_app.extensions["migrate"].db
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def get_metadata():
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if hasattr(target_db, "metadatas"):
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return target_db.metadatas[None]
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return target_db.metadata
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def run_migrations_offline() -> None:
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url = config.get_main_option("sqlalchemy.url")
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context.configure(url=url, target_metadata=get_metadata(), literal_binds=True)
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with context.begin_transaction():
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context.run_migrations()
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def run_migrations_online() -> None:
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def process_revision_directives(context, revision, directives): # noqa: ANN001
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if getattr(config.cmd_opts, "autogenerate", False):
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script = directives[0]
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if script.upgrade_ops.is_empty():
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directives[:] = []
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logger.info("No changes in schema detected.")
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conf_args = current_app.extensions["migrate"].configure_args
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if conf_args.get("process_revision_directives") is None:
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conf_args["process_revision_directives"] = process_revision_directives
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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=get_metadata(),
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**conf_args,
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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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