| 123456789101112131415161718192021222324252627282930313233343536373839404142 | """messages columns set nullableRevision ID: b5429b71023cRevises: 42e85ed5564dCreate Date: 2024-03-07 09:52:00.846136"""import sqlalchemy as safrom alembic import op# revision identifiers, used by Alembic.revision = 'b5429b71023c'down_revision = '42e85ed5564d'branch_labels = Nonedepends_on = Nonedef upgrade():    # ### commands auto generated by Alembic - please adjust! ###    with op.batch_alter_table('messages', schema=None) as batch_op:        batch_op.alter_column('model_provider',               existing_type=sa.VARCHAR(length=255),               nullable=True)        batch_op.alter_column('model_id',               existing_type=sa.VARCHAR(length=255),               nullable=True)    # ### end Alembic commands ###def downgrade():    # ### commands auto generated by Alembic - please adjust! ###    with op.batch_alter_table('messages', schema=None) as batch_op:        batch_op.alter_column('model_id',               existing_type=sa.VARCHAR(length=255),               nullable=False)        batch_op.alter_column('model_provider',               existing_type=sa.VARCHAR(length=255),               nullable=False)    # ### end Alembic commands ###
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