ruby-on-rails – Rails：由于外键验证,一对多关联失败

我有两个型号 – 罗塔和用户.我希望用户“创建”一个rota.用户可以创建多个rota.

测试失败

*在rota_spec中：*

it {should belong_to :creator}
Expected Rota to have a belongs_to association called creator (Rota does not have a creator_id foreign key.)

*在user_spec中：*

it {should have_many :created_rotas}
Expected User to have a has_many association called created_rotas (Rota does not have a creator_id foreign key.)

Rota.rb

belongs_to :creator,:class_name => "User"

User.rb

has_many :created_rotas,:class_name => "Rota",:foreign_key => "creator_id"

移民

class AddCreatorToRotas < ActiveRecord::Migration
  def change
    add_column :rotas,:creator_id,:string
  end
end