discourse/db/migrate/20140711193923_remove_email_in_address_setting.rb

class RemoveEmailInAddressSetting < ActiveRecord::Migration[4.2]
  def up
    uncat_id = DB.query_single("SELECT value FROM site_settings WHERE name = 'uncategorized_category_id'").first
    cat_id_r = DB.query_single("SELECT value FROM site_settings WHERE name = 'email_in_category'").first
    email_r = DB.query_single("SELECT value FROM site_settings WHERE name = 'email_in_address'").first
    if email_r
      category_id = uncat_id["value"].to_i
      category_id = cat_id_r["value"].to_i if cat_id_r
      email = email_r["value"]
      DB.exec("UPDATE categories SET email_in = ? WHERE id = ?", email, category_id)
    end

    DB.exec("DELETE FROM site_settings WHERE name = 'email_in_category' OR name = 'email_in_address'")
  end

  def down
    # this change is backwards-compatible
  end
end