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@@ -0,0 +1,73 @@
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+from __future__ import with_statement
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+from alembic import context
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+from sqlalchemy import engine_from_config, pool
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+from logging.config import fileConfig
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+
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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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+
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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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+
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+# add your model's MetaData object here
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+# for 'autogenerate' support
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+# from myapp import mymodel
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+# target_metadata = mymodel.Base.metadata
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+from flask import current_app
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+config.set_main_option('sqlalchemy.url', current_app.config.get('SQLALCHEMY_DATABASE_URI'))
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+target_metadata = current_app.extensions['migrate'].db.metadata
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+
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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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+
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+def run_migrations_offline():
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+ """Run migrations in 'offline' mode.
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+
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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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+
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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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+ """
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+ url = config.get_main_option("sqlalchemy.url")
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+ context.configure(url=url)
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+
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+ with context.begin_transaction():
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+ context.run_migrations()
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+
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+def run_migrations_online():
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+ """Run migrations in 'online' mode.
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+
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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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+ """
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+ engine = engine_from_config(
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+ config.get_section(config.config_ini_section),
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+ prefix='sqlalchemy.',
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+ poolclass=pool.NullPool)
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+
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+ connection = engine.connect()
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+ context.configure(
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+ connection=connection,
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+ target_metadata=target_metadata
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+ )
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+
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+ try:
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+ with context.begin_transaction():
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+ context.run_migrations()
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+ finally:
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+ connection.close()
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+
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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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+
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