69 lines
2.0 KiB
Python
69 lines
2.0 KiB
Python
from logging.config import fileConfig
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from alembic import context
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from tofu_api.app import create_app
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from tofu_api.models import BaseModel
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# This is the Alembic Config object, which provides 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. 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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# Create Flask app, which loads the app config and initializes the database engine.
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app = create_app()
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db = app.dependencies.get_sqlalchemy()
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def process_revision_directives(_context, _revision, directives):
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"""
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Callback used to prevent generating empty migrations with autogenerate.
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Source: https://alembic.sqlalchemy.org/en/latest/cookbook.html#don-t-generate-empty-migrations-with-autogenerate
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"""
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if alembic_config.cmd_opts.autogenerate and directives[0].upgrade_ops.is_empty():
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directives[:] = []
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context_parameters = {
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'target_metadata': BaseModel.metadata,
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'process_revision_directives': process_revision_directives,
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'user_module_prefix': 'tofu_types.',
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}
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def run_migrations_offline():
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"""
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Run migrations in 'offline' mode, which does not require an actual database engine and can be used to generate SQL scripts.
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"""
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context.configure(
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url=app.config.sqlalchemy_database_uri,
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literal_binds=True,
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dialect_opts={"paramstyle": "named"},
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**context_parameters,
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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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"""
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Run migrations in 'online' mode, which requires a database engine.
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"""
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with db.engine.connect() as connection:
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context.configure(
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connection=connection,
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**context_parameters,
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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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