Ruby on rails heroku迁移失败_Ruby On Rails_Heroku_Rails Migrations

Ruby on rails heroku迁移失败

ruby-on-rails heroku

Ruby on rails heroku迁移失败,ruby-on-rails,heroku,rails-migrations,Ruby On Rails,Heroku,Rails Migrations,在heroku中，我运行了rake db:migrate并得到了以下错误 == AlterBodyForDocuments: migrating ========================================== -- change_column(:documents, :body, :mediumtext) rake aborted! An error has occurred, this and all later migrations canceled: PGErro

在heroku中，我运行了rake db:migrate并得到了以下错误

==  AlterBodyForDocuments: migrating ==========================================
-- change_column(:documents, :body, :mediumtext)
rake aborted!
An error has occurred, this and all later migrations canceled:

PGError: ERROR:  type "mediumtext" does not exist
: ALTER TABLE "documents" ALTER COLUMN "body" TYPE mediumtext

Tasks: TOP => db:migrate
(See full trace by running task with --trace)

这是我的文档迁移备选方案：

class AlterBodyForDocuments < ActiveRecord::Migration
  def change
    change_column :documents, :body, :mediumtext
  end
end

class AlterBodyForDocuments

我认为mediumtext是mysql的东西

heroku使用postgresql

改用

：text