From a8a1f74a9207339bf707bb09e8dba7b2c67abb5b Mon Sep 17 00:00:00 2001 From: Frédéric Mangano-Tarumi Date: Sat, 22 Feb 2020 22:31:26 +0100 Subject: Set up Alembic for database migrations Signed-off-by: Lukas Fleischer --- migrations/env.py | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 migrations/env.py (limited to 'migrations/env.py') diff --git a/migrations/env.py b/migrations/env.py new file mode 100644 index 00000000..1627e693 --- /dev/null +++ b/migrations/env.py @@ -0,0 +1,73 @@ +import aurweb.db +import aurweb.schema + +from alembic import context +import logging.config +import sqlalchemy + + +# this is the Alembic Config object, which provides +# access to the values within the .ini file in use. +config = context.config + +# Interpret the config file for Python logging. +# This line sets up loggers basically. +logging.config.fileConfig(config.config_file_name) + +# model MetaData for autogenerating migrations +target_metadata = aurweb.schema.metadata + +# other values from the config, defined by the needs of env.py, +# can be acquired: +# my_important_option = config.get_main_option("my_important_option") +# ... etc. + + +def run_migrations_offline(): + """Run migrations in 'offline' mode. + + This configures the context with just a URL + and not an Engine, though an Engine is acceptable + here as well. By skipping the Engine creation + we don't even need a DBAPI to be available. + + Calls to context.execute() here emit the given string to the + script output. + + """ + context.configure( + url=aurweb.db.get_sqlalchemy_url(), + target_metadata=target_metadata, + literal_binds=True, + dialect_opts={"paramstyle": "named"}, + ) + + with context.begin_transaction(): + context.run_migrations() + + +def run_migrations_online(): + """Run migrations in 'online' mode. + + In this scenario we need to create an Engine + and associate a connection with the context. + + """ + connectable = sqlalchemy.create_engine( + aurweb.db.get_sqlalchemy_url(), + poolclass=sqlalchemy.pool.NullPool, + ) + + with connectable.connect() as connection: + context.configure( + connection=connection, target_metadata=target_metadata + ) + + with context.begin_transaction(): + context.run_migrations() + + +if context.is_offline_mode(): + run_migrations_offline() +else: + run_migrations_online() -- cgit v1.2.3-24-g4f1b