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+%22%22%22Add the %60publication_date%60 column.%0A%0ARevision ID: 3c4c29f0a791%0ARevises: 58b68b5e4e3c%0ACreate Date: 2012-11-26 22:28:41.400425%0A%0A%22%22%22%0A%0A# revision identifiers, used by Alembic.%0Arevision = '3c4c29f0a791'%0Adown_revision = '58b68b5e4e3c'%0A%0Afrom alembic import op%0Aimport sqlalchemy as sa%0A%0A%0Adef upgrade():%0A    op.add_column('tip', sa.Column('publication_date', sa.DateTime(timezone=True)))%0A%0A%0Adef downgrade():%0A    op.drop_column('tip', 'publication_date')%0A%0A

Create publication_date column.