我有一个Project
迁移类,如下所示:
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
它在项目表中创建了一个列名user_id
,但我想将列命名为owner_id
,因此我可以使用project.owner
代替project.user
。
答案 0 :(得分:9)
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
OR
$ 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