我一直在本地主机上开发一个网站,效果很好。今天早上,我尝试使用命令“git push heroku master”然后“heroku run rake db:migrate”将它推送到heroku。当我尝试做第二个时,我有一个错误:
Connecting to database specified by DATABASE_URL
Migrating to DeviseCreateUsers (20130427200347)
Migrating to CreateAuthentications (20130427210108)
Migrating to AddTokenToAuth (20130427233400)
Migrating to AddNotificationToAuth (20130427234836)
Migrating to AddNotifToUser (20130428031013)
Migrating to AddDeviseToUsers (20130712103048)
== AddDeviseToUsers: migrating ===============================================
-- change_table(:users)
rake aborted!
An error has occurred, this and all later migrations canceled:
PGError: ERROR: column "email" of relation "users" already exists
: ALTER TABLE "users" ADD COLUMN "email" character varying(255) DEFAULT '' NOT N
sql_adapter.rb:652:in `async_exec'
我找到了遇到同样问题的人(heroku PGError: already exists 500 We're sorry, but出了问题),但在我的情况下,迁移“AddDeviseToUsers”不在“db/migrate”文件夹中。
以前影响用户表的迁移是:
class DeviseCreateUsers < ActiveRecord::Migration
def change
create_table(:users) do |t|
## Database authenticatable
t.string :email, :null => false, :default => ""
t.string :encrypted_password, :null => false, :default => ""
## Recoverable
t.string :reset_password_token
t.datetime :reset_password_sent_at
## Rememberable
t.datetime :remember_created_at
## Trackable
t.integer :sign_in_count, :default => 0
t.datetime :current_sign_in_at
t.datetime :last_sign_in_at
t.string :current_sign_in_ip
t.string :last_sign_in_ip
## Token authenticatable
# t.string :authentication_token
t.timestamps
end
add_index :users, :email, :unique => true
add_index :users, :reset_password_token, :unique => true
end
end
和
class AddNotifToUser < ActiveRecord::Migration
def change
add_column :users, :notif, :string
end
end
提前致谢 !!
编辑 - 我运行时回答评论:heroku run rake db:migrate:status
up 20130427200347 Devise create users
up 20130427210108 Create authentications
up 20130427233400 Add token to auth
up 20130427234836 Add notification to auth
up 20130428031013 Add notif to user
down 20130712103048 Add devise to users
down 20130719091217 Create relationships
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