我无法在显示页面页面显示信息。我认为是因为flight_id正以零保存到数据库中。也许该协会没有建立或我的形式可能是错的。我不确切知道，需要帮助搞清楚。我已粘贴下面的模型，视图和控制器。任何关于我做错事的见解都会很棒
预订控制器
class BookingsController < ApplicationController
def new
@booking = Booking.new
@flight = Flight.find(params[:flight_id])
@passenger = params[:passenger].to_i
@passenger.to_i.times { @booking.passengers.build }
end
def create
@booking = Booking.new(booking_params)
if @booking.save
flash[:success] = 'Your flight has been booked'
redirect_to @booking
else
flash[:danger] = 'flight booking failure!'
render 'new'
end
end
def show
@booking = Booking.find(params[:id])
end
private
def booking_params
params.fetch(:booking).permit(:flight_id, passengers_attributes: [:name, :email])
end
end
new.html.slim
.row
.col-md-6.col-md-offset-3
table.table
tr
th Flight Number
th Departure
th Destination
th Date
th Passengers
tbody
tr
td = @flight.id
td = @flight.from_airport.code
td = @flight.to_airport.code
td = @flight.date
td = @passenger
= form_for @booking do |f|
= f.fields_for :passengers do |p|
= p.label :name
= p.text_field :name, class: 'form-control'
= p.label :email
= p.text_field :email, class: 'form-control'
= hidden_field_tag :flight_id, params[:flight_id]
= hidden_field_tag :passenger, params[:passenger]
= f.submit 'Finish', class: 'btn btn-primary btn-block'
乘客模式
class Passenger < ActiveRecord::Base
has_many :flights, through: :bookings
has_many :bookings, through: :passenger_bookings
has_many :passenger_bookings
end
飞行模型
class Flight < ActiveRecord::Base
belongs_to :from_airport, foreign_key: :start_airport_id, class_name: 'Airport'
belongs_to :to_airport, foreign_key: :end_airport_id, class_name: 'Airport'
has_many :passengers
has_many :bookings
def self.all_airports
Airport.all
end
def self.all_dates
Flight.pluck(:date).uniq.sort
end
def self.search(start, finish, date)
Flight.where(start_airport_id: start,
end_airport_id: finish,
date: date)
end
end
预订模式
class Booking < ActiveRecord::Base
belongs_to :flight
has_many :passengers, through: :passenger_bookings
has_many :passenger_bookings
accepts_nested_attributes_for :passengers
end
模式
ActiveRecord::Schema.define(version: 20161122010622) do
create_table "airports", force: :cascade do |t|
t.string "code"
t.string "city"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "bookings", force: :cascade do |t|
t.integer "flight_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "flights", force: :cascade do |t|
t.integer "start_airport_id"
t.integer "end_airport_id"
t.integer "duration"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.date "date"
end
add_index "flights", ["end_airport_id"], name: "index_flights_on_end_airport_id"
add_index "flights", ["start_airport_id"], name: "index_flights_on_start_airport_id"
create_table "passenger_bookings", force: :cascade do |t|
t.integer "passenger_id"
t.integer "booking_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "passenger_bookings", ["booking_id"], name: "index_passenger_bookings_on_booking_id"
add_index "passenger_bookings", ["passenger_id"], name: "index_passenger_bookings_on_passenger_id"
create_table "passengers", force: :cascade do |t|
t.string "name"
t.string "email"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
end
show.html.slim
h1 = @booking.id
h2 = @booking.flight_id
h2 = @booking.flight.from_airport.code
h2 = @booking.flight.to_airport.code
h2 = @booking.passengers
服务器日志
Started POST "/bookings" for 127.0.0.1 at 2016-11-21 20:56:58 -0500
Processing by BookingsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"rVU9PFoNQSoeFZDzximvSTFU1L88RynjNxLpL7rKaBvJhWP9QCIkqxzvRTPzR/7yp7MTdnU9ZZnf1/WkJwu84w==", "booking"=>{"passengers_attributes"=>{"0"=>{"name"=>"mighty", "email"=>"fasdfasd@afda.com"}}}, "flight_id"=>"5", "passenger"=>"1", "commit"=>"Finish"}
(0.5ms) begin transaction
SQL (0.9ms) INSERT INTO "bookings" ("created_at", "updated_at") VALUES (?, ?) [["created_at", "2016-11-22 01:56:58.288407"], ["updated_at", "2016-11-22 01:56:58.288407"]]
SQL (23.1ms) INSERT INTO "passengers" ("name", "email", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["name", "mighty"], ["email", "fasdfasd@afda.com"], ["created_at", "2016-11-22 01:56:58.297067"], ["updated_at", "2016-11-22 01:56:58.297067"]]
SQL (1.0ms) INSERT INTO "passenger_bookings" ("booking_id", "passenger_id", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["booking_id", 41], ["passenger_id", 46], ["created_at", "2016-11-22 01:56:58.340140"], ["updated_at", "2016-11-22 01:56:58.340140"]]
(310.9ms) commit transaction
Redirected to http://localhost:3000/bookings/41
Completed 302 Found in 400ms (ActiveRecord: 336.4ms)
Started GET "/bookings/41" for 127.0.0.1 at 2016-11-21 20:56:58 -0500
Processing by BookingsController#show as HTML
Parameters: {"id"=>"41"}
Booking Load (0.4ms) SELECT "bookings".* FROM "bookings" WHERE "bookings"."id" = ? LIMIT 1 [["id", 41]]
Rendered bookings/show.html.slim within layouts/application (0.5ms)
Completed 200 OK in 375ms (Views: 371.2ms | ActiveRecord: 0.4ms)
答案 0 :(得分：0)
看看这个Examples of new, create actions for has_many :through associations (nested)。
使用嵌套属性创建航班预订。
所以new
BookingsController行动
必须
def new
@flight = Flight.find(params[:flight_id])
@booking = @flight.bookings.build
@passenger = params[:passenger].to_i
@passenger.to_i.times { @booking.passengers.build }
end
现在航班ID将被保存以供预订。
对于表单，您可以按照链接中提供的说明进行操作。
答案 1 :(得分：0)
这两个字段
= hidden_field_tag :flight_id, params[:flight_id]
= hidden_field_tag :passenger, params[:passenger]
未包含在booking_params中。要解决此问题，您可以在new操作
def new
@booking = Booking.new(:flight_id => params[:flight_id], :passenger => params[:passenger])
...
end
然后在表单中，执行此操作
= f.hidden_field :flight_id
= f.hidden_field :passenger