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config = context.config
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target_metadata = db.metadata
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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. |
Run migrations in 'online' mode. In this scenario we need to create an Engine and associate a connection with the context. |
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