new_contents: """Add status column to tickets.
  
  Revision ID: ec3035d61f8b
  Revises: 0397e48c5db8
  Create Date: 2020-08-30 21:04:30.936267
  
  """
  from alembic import op
  import sqlalchemy as sa
  
  
  # revision identifiers, used by Alembic.
  revision = 'ec3035d61f8b'
  down_revision = '0397e48c5db8'
  branch_labels = None
  depends_on = None
  
  
  def upgrade():
      try:
          op.add_column('serials', sa.Column('status', sa.String(length=10), nullable=True))
      except Exception:
          pass
  
  
  def downgrade():
      with op.batch_alter_table('serials') as batch:
          batch.drop_column('status')
  
subject: Add ticket's status column migration.