Question

When making my model, I made row type as string (I wasn’t aware of datetime at the time). Currently I have plenty of records that have that row filled. Is there a safe way to convert the model’s row to datetime through a migration – besides just removing it, and then adding it back?

Thanks!

Answer 1

Accordingly to the documentation this is an example of migration that transforms a string in datetime. I’m not sure it will work so you may want to try it out on a dev/stage env before going to the prod env.

class ChangeColumnToUsers < ActiveRecord::Migration
  def self.up
    change_column :users, :created_at, :datetime

  end

  def self.down
    change_column :users, :created_at, :string
  end
end