在rails中更改外键列名称

Question

我有一个这样的Project迁移类:

class CreateProjects < ActiveRecord::Migration
 def change
  create_table :projects do |t|
   t.string :title
   t.text :description
   t.boolean :public
   t.references :user, index: true, foreign_key: true

   t.timestamps null: false
  end
 end
end

它user_id在项目表中创建一个列名,但我想命名列,owner_id以便我可以使用project.owner而不是project.user.

Answer 1

你可以用两种方式做到:

#app/models/project.rb
class Project < ActiveRecord::Base
   belongs_to :owner, class_name: "User", foreign_key: :user_id
end 

要么

$ rails g migration ChangeForeignKeyForProjects

# db/migrate/change_foreign_key_for_projects.rb
class ChangeForeignKeyForProjects < ActiveRecord::Migration
   def change
      rename_column :projects, :user_id, :owner_id
   end
end

然后:

$ rake db:migrate