Mysql2 ::错误：键列＆＃39; hotel_user_id＆＃39;表格中不存在

Question

我有：

def change

  create_table :orders do |t|
    t.string :name
    t.text :address,:limit=>500
    t.string :email
    t.string :pay_type
    t.string :phone,:limit=>25
    t.integer :hotel_user_id
    t.timestamps
  end

  add_index("hotel_users","hotel_user_id")
end

日志错误：

$ rake db:migrate
== 20140822140639 CreateOrders: migrating ====================================
-- create_table(:orders)
   -> 0.0790s

-- add_index("hotel_users", "hotel_user_id")
rake aborted!

StandardError: An error has occurred, all later migrations canceled:


Mysql2::Error: Key column 'hotel_user_id' doesn't exist in table: CREATE  INDEX index_hotel_users_on_hotel_user_id`  ON 'hot
el_users' ('hotel_user_id') F:/OrderBooking/db/migrate/20140822140639_create_orders.rb:12:in 'change'
c:in 'migrate'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)'

我有一个表hotel_users，它有很多orders。我命令表我想设置一个外键。但是我在创建表时遇到上述错误。

Answer 1

问题是订单表中存在列hotel_user_id，而您正在hotel_users表的同一列上创建索引。