Question

首先我认为这是一个验证问题但后来意识到每次保存记录时它只会覆盖第一条记录。

List.rb

belongs_to :user, :foreign_key => "user_id"

在我的模式中，我有：

create_table "lists", force: :cascade do |t|
t.text     "pont12"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer  "user_id"
end

User.rb

has_one :list, dependent: :destroy

ListsController

def new
@list = current_user.build_list
...
def create
@list = current_user.build_list(list_params)
....

在我“成功”在前端创建列表后的日志中：

User Load (0.2ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ?  ORDER BY "users"."id" ASC LIMIT 1  [["id", 4]]
List Load (0.1ms)  SELECT  "lists".* FROM "lists" WHERE "lists"."user_id" = ? LIMIT 1  [["user_id", 4]]
(0.3ms)  begin transaction
SQL (0.4ms)  INSERT INTO "lists" ("pont12", "user_id", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["pont12", "the list..."], ["user_id", 4], ["created_at", "2015-03-06 10:03:45.368204"], ["updated_at", "2015-03-06 10:03:45.368204"]]
(11.1ms)  commit transaction

这只是覆盖了第一张唱片。

ps：Rails的新手;）

Answer 1

我发现了问题：foreign_key需要在has_one上，而不是在他模型的belongs_to行上。

Rails 4 has_one - 始终覆盖第一条记录

1 个答案: