unknown
64 lines
1.6 KiB
Python
64 lines
1.6 KiB
Python
from logging.config import fileConfig
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import os
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from sqlalchemy import engine_from_config, pool
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from alembic import context
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config = context.config
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fileConfig(config.config_file_name)
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import sys
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sys.path.insert(0, '/app')
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from models import Base
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target_metadata = Base.metadata
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def _get_url():
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# first try environment variable, then fall back to config file
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return os.getenv("DATABASE_URL") or config.get_main_option("sqlalchemy.url")
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def run_migrations_offline():
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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 = _get_url()
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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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dialect_opts={"paramstyle": "named"},
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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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"""Run migrations in "online" mode."""
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connectable = 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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url=_get_url(),
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)
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with connectable.connect() as connection:
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context.configure(
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connection=connection, target_metadata=target_metadata
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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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