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我想学习一些关于在Rails的5 ActiveModelSerializers我下面这个tutorial,跑进了一些错误:导轨5和ActiveModelSerializers
我可能不应该与周围的Rails搞乱5测试版吧?
rails -v
Rails 5.0.0.beta3
和Ruby:
ruby -v
ruby 2.2.4p230 (2015-12-16 revision 53155) [x86_64-darwin15]
这里是我的架构:
ActiveRecord::Schema.define(version: 20160303205439) do
create_table "rental_units", force: :cascade do |t|
t.string "address"
t.integer "rooms"
t.integer "bathrooms"
t.integer "price_cents"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "user_id"
end
add_index "rental_units", ["user_id"], name: "index_rental_units_on_user_id"
create_table "users", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "email"
end
end
这里是我的种子:
User.create(name: "1st user", email: "[email protected]")
User.create(name: "2nd user", email: "[email protected]")
User.create(name: "3rd user", email: "[email protected]")
RentalUnit.create(address: "1st address", rooms: 2, bathrooms: 2, price_cents: 50000, user_id:1)
RentalUnit.create(address: "2nd address", rooms: 2, bathrooms: 2, price_cents: 50000, user_id:1)
RentalUnit.create(address: "3rd address", rooms: 2, bathrooms: 2, price_cents: 50000, user_id:1)
RentalUnit.create(address: "4th address", rooms: 2, bathrooms: 2, price_cents: 50000, user_id:2)
这里是我的RentalUnit型号:
class RentalUnit < ApplicationRecord
end
这里是我的RentalUnitSerializer:
class RentalUnitSerializer < ActiveModel::Serializer
attributes :id, :address, :rooms, :bathrooms, :price, :price_per_room
belongs_to :user
end
当我尝试运行轨道服务器,我得到:
rs
=> Booting Puma
=> Rails 5.0.0.beta3 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
/Users/Jwan/Dropbox/programming/rails/api_codeship/app/serializers/rental_unit_serializer.rb:3:in `<class:RentalUnitSerializer>': undefined method `belongs_to' for RentalUnitSerializer:Class (NoMethodError)
from /Users/Jwan/Dropbox/programming/rails/api_codeship/app/serializers/rental_unit_serializer.rb:1:in `<top (required)>'
...
任何想法是怎么回事?
任何人都可以在API设计,Rails API和AMS上使用任何好的教程吗?
我看到所以RentalUnitSerializer中的belongs_to不够? – Jwan622
正确,因为序列化程序接受模型并将其转换为JSON。如果模型没有'user_id'字段,那么没有数据可以说明它属于哪个用户。 – HM1
那么,那么belongs_to:用户在串行器中做什么呢? – Jwan622