| 123456789101112131415161718192021222324 | """add registration date to playRevision ID: f058537a8871Revises: 6a81f102bb33Create Date: 2019-09-05 13:52:42.319013"""from alembic import opimport sqlalchemy as sa# revision identifiers, used by Alembic.revision = 'f058537a8871'down_revision = '6a81f102bb33'branch_labels = Nonedepends_on = Nonedef upgrade():    op.add_column('player', sa.Column('registration_date', sa.Date(), nullable=True))def downgrade():    op.drop_column('player', 'registration_date')
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