Ruby on rails 从rails中引用外键记录的表中删除主键

如果唯一标识符是

user\u id

外键，是否需要我的

id

列？我想我永远不会按id查询

user\u profile

。原因是我的用户模型

有一个：user\u profile

，我的

user\u profile属于：user

模型

class User < ApplicationRecord
  has_one :user_profile  
end

class UserProfile < ApplicationRecord
  belongs_to :user
end

---

您可以将表的任何属性称为主键，如下所示：

create_table :user_profiles, :primary_key => :user_id do |t|

                                          Table "public.user_profiles"
   Column   |              Type              | Collation | Nullable |                  Default                  
------------+--------------------------------+-----------+----------+-------------------------------------------
 id         | bigint                         |           | not null | nextval('user_profiles_id_seq'::regclass)
 first_name | character varying              |           |          | 
 last_name  | character varying              |           |          | 
 created_at | timestamp(6) without time zone |           | not null | 
 updated_at | timestamp(6) without time zone |           | not null | 
 users_id   | bigint                         |           |          | 
Indexes:
    "user_profiles_pkey" PRIMARY KEY, btree (id)
Foreign-key constraints:
    "fk_rails_1e573f2ed5" FOREIGN KEY (users_id) REFERENCES users(id)

create_table :user_profiles, :primary_key => :user_id do |t|