【发布时间】：2019-09-25 14:04:14
【问题描述】：
型号：
class Reservation < ApplicationRecord
# https://naturaily.com/blog/ruby-on-rails-enum
enum recurrence: {
daily: 0,
weekly: 1,
monthly: 2,
annually: 3
}, _prefix: :recurring
belongs_to :user
validates :name, :user_id, presence: true
...
end
迁移：
class CreateReservations < ActiveRecord::Migration[5.2]
def change
create_table :reservations do |t|
t.string 'name', null: false
...
t.boolean 'recurring', default: false, null: false
t.integer 'recurrence', index: true, allow_blank: true, default: nil # trying a lot of things here
t.datetime 'expire_time'
...
end
end
end
在控制台中按预期工作：
2.4.5 :002 > res = Reservation.new(name: 'test', user_id: 1)
=> #<Reservation id: nil, name: "test", recurring: false, recurrence: nil, date: nil, start_time: nil, end_time: nil, expire_time: nil, user_id: 1, created_at: nil, updated_at: nil>
2.4.5 :003 > res.valid?
User Load (0.7ms) SELECT "users".* FROM "users" WHERE "users"."deleted_at" IS NULL AND "users"."id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]]
=> true
2.4.5 :004 > res.save
(0.2ms) BEGIN
Reservation Create (0.5ms) INSERT INTO "reservations" ("name", "user_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id" [["name", "test"], ["user_id", 1], ["created_at", "2019-09-24 20:42:40.933959"], ["updated_at", "2019-09-24 20:42:40.933959"]]
(2.1ms) COMMIT
=> true
2.4.5 :005 > res.reload
Reservation Load (0.3ms) SELECT "reservations".* FROM "reservations" WHERE "reservations"."id" = $1 LIMIT $2 [["id", 5], ["LIMIT", 1]]
=> #<Reservation id: 5, name: "test", recurring: false, recurrence: nil, date: nil, start_time: nil, end_time: nil, expire_time: nil, user_id: 1, created_at: "2019-09-24 20:42:40", updated_at: "2019-09-24 20:42:40">
2.4.5 :006 > res.recurrence
=> nil
然而，在 Rails Admin 中，当我创建或编辑记录时，它们都被分配给第一个枚举。即使我故意从表单中删除该值，它仍然会使用第一个枚举值保存记录。
Rails 管理员：
config.model Reservation do
weight 2
parent Event
list do
field :name
field :display_date do
formatted_value { bindings[:object].display_date }
end
field :recurrence, :active_record_enum # should be unnecessary, but trying everything
field :expire_time
field :user do
label 'Creator'
formatted_value { bindings[:object].user.name }
end
end
end
我试过了：
- 不索引该字段（认为 Rails 管理员想要索引列的值）
- 确保在 `field :recurrence` 上声明 `:active_record_enum`
按照建议，这是日志的相关部分：
Started POST "/admin/reservation/new" for ::1 at 2019-09-25 10:09:50 -0400
Processing by RailsAdmin::MainController#new as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"VbhHM7YD+oQvwMYIQzMHyT5e0MXFFuN3pyH/1s6yM8n6kqKvywZ5E8zaABMKhOU+oWpfU1Kk55FWYjL9TzbkbQ==", "reservation"=>{"name"=>"logs", "date"=>"", "start_time"=>"", "end_time"=>"", "recurring"=>"0", "recurrence"=>"", "expire_time"=>"", "start_time_of_day"=>"", "end_time_of_day"=>"", "day_of_week"=>"", "date_of_month"=>"", "date_of_year"=>"", "user_id"=>"1"}, "return_to"=>"http://localhost:3000/admin/reservation", "_save"=>"", "model_name"=>"reservation"}
User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."deleted_at" IS NULL AND "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 1], ["LIMIT", 1]]
(0.2ms) BEGIN
User Load (0.6ms) SELECT "users".* FROM "users" WHERE "users"."deleted_at" IS NULL AND "users"."id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]]
Reservation Create (0.4ms) INSERT INTO "reservations" ("name", "recurrence", "day_of_week", "date_of_month", "date_of_year", "user_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7, $8) RETURNING "id" [["name", "logs"], ["recurrence", 0], ["day_of_week", ""], ["date_of_month", ""], ["date_of_year", ""], ["user_id", 1], ["created_at", "2019-09-25 14:09:50.926864"], ["updated_at", "2019-09-25 14:09:50.926864"]]
(1.3ms) COMMIT
Redirected to http://localhost:3000/admin/reservation
Completed 302 Found in 26ms (ActiveRecord: 3.0ms)
而且，果然参数"recurrence"=>""被转换成["recurrence", 0]
这似乎是一个known issue，但如果它是一个合法的错误，我仍然需要解决方法的帮助。有人已经解决了这个问题吗？
【问题讨论】：
-
日志是什么？正在发送到服务器的参数。
-
谢谢塞巴斯蒂安。日志确认
""转换为0就像 Ruby 所做的那样："".to_i => 0
标签： ruby-on-rails enums ruby-on-rails-5 rails-admin