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rake db:migrate 在开发中运行良好,应用程序也是如此。只有有了heroku,我才会遇到麻烦

$ heroku run rake db:migrate

Running `rake db:migrate` attached to terminal... up, run.5905
-- create_table(:users)
-- create_table(:users)
rake aborted!
ActiveRecord::MigrationProxy#disable_ddl_transaction delegated to 
migration.disable_ddl_transaction, but migration is nil: 
#<struct ActiveRecord::MigrationProxy name="DeviseCreateAdmins", 
version=20130802210826, filename="/app/db/migrate/20130802210826_devise_create_admins.rb", 
scope=""

迁移文件:

class DeviseCreateAdmins < ActiveRecord::Migration
  create_table :users do |t|
    t.database_authenticatable
    t.confirmable
    t.recoverable
    t.rememberable
    t.trackable
    t.timestamps
  end
end

有人对迁移失败的原因有任何想法吗?

4

1 回答 1

2

您缺少方法名称,

class DeviseCreateAdmins < ActiveRecord::Migration
  def change
    create_table :users do |t|
      t.database_authenticatable
      t.confirmable
      t.recoverable
      t.rememberable
      t.trackable
      t.timestamps
    end
  end
end

注意def change开头的。

于 2013-10-31T08:51:56.877 回答