| 12345678910111213141516171819202122232425262728293031 | """add message file belongs toRevision ID: 9fafbd60eca1Revises: 4823da1d26cfCreate Date: 2024-01-15 13:07:20.340896"""import sqlalchemy as safrom alembic import op# revision identifiers, used by Alembic.revision = '9fafbd60eca1'down_revision = '4823da1d26cf'branch_labels = Nonedepends_on = Nonedef upgrade():    # ### commands auto generated by Alembic - please adjust! ###    with op.batch_alter_table('message_files', schema=None) as batch_op:        batch_op.add_column(sa.Column('belongs_to', sa.String(length=255), nullable=True))    # ### end Alembic commands ###def downgrade():    # ### commands auto generated by Alembic - please adjust! ###    with op.batch_alter_table('message_files', schema=None) as batch_op:        batch_op.drop_column('belongs_to')    # ### end Alembic commands ###
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