class DropPostCountFromPools < ActiveRecord::Migration[5.2]
  def up
    Pool.without_timeout do
      remove_column :pools, :post_count
    end
  end

  def down
    Pool.without_timeout do
      add_column :pools, :post_count, :integer, default: 0, null: false
      Pool.update_all("post_count = cardinality(post_ids)")
    end
  end
end