script.py.mako
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| mako
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<%! import re %>"""${message} Revision ID: ${up_revision} Revises: ${down_revision | comma,n} Create Date: ${create_date} """ from alembic import op import sqlalchemy as sa ${imports if imports else ""} # revision identifiers, used by Alembic. revision = ${repr(up_revision)} down_revision = ${repr(down_revision)} branch_labels = ${repr(branch_labels)} depends_on = ${repr(depends_on)} def upgrade(engine_name: str) -> None: globals()["upgrade_%s" % engine_name]() def downgrade(engine_name: str) -> None: globals()["downgrade_%s" % engine_name]() <% db_names = config.get_main_option("databases") %> ## generate an "upgrade_<xyz>() / downgrade_<xyz>()" function ## for each database name in the ini file. % for db_name in re.split(r',\s*', db_names): def upgrade_${db_name}() -> None: ${context.get("%s_upgrades" % db_name, "pass")} def downgrade_${db_name}() -> None: ${context.get("%s_downgrades" % db_name, "pass")} % endfor
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