如何設置關聯模型的錯誤信息？

Question

你好rails社區！

我有has_many保留booking_post模型。

class BookingPost < ApplicationRecord 
    has_many :reservations, dependent: :destroy 
end 

所有預訂belongs_to的booking_post並有一定的驗證

class Reservation < ApplicationRecord 
    belongs_to :booking_post 
    before_save { self.email = email.downcase } 
    VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i 
    validates :email, presence: true, length: { maximum: 255 }, 
        format: { with: VALID_EMAIL_REGEX } 
    validates :name, :email, :phone_number, :start, :end, presence: true 
end 

我的路線是下一個：

resources :booking_posts do 
    resources :reservations, only: [:new, :create] 
end 

方法：

class BookingPostsController < ApplicationController 
    def show 
    @booking_picture = @booking_post.booking_pictures.build 
    @booking_pictures = @booking_post.booking_pictures 
    @reservation = @booking_post.reservations.build 
    @reservations = @booking_post.reservations 
    end 
end 


class ReservationsController < ApplicationController 
    def new 
    @reservation = Reservation.new 
    end 
    def create 
    @booking_post = BookingPost.find(params[:booking_post_id]) 
    @email= User.where(admin: true).first.email 
    @reservation = @booking_post.reservations.build(reservation_params) 
     if @reservation.save 
     @saved_reservation = @reservation 
     redirect_to :back 
     flash[:notice] = 'Reservation was successfully created.' 
     ReservationMailer.fresh_message(@saved_reservation, @email).deliver_now 
     else 
     redirect_to @booking_post 
     flash[:info] = @reservation.errors.full_messages do |m| 
      m 
     end 
     end 
    end 
end 

我想創建booking_posts /show.html.e rb form_for @reservation，並在此頁面上呈現@reservation錯誤。當我創建有效的@reservation時，我會在booking_posts/show.html.erb上看到成功的Flash消息，但無效的@reservation會顯示而不會出現任何錯誤的Flash消息。

的form_for @reservation上booking_posts/show.html.erb：

<div class="card-action"> 
    <%= form_for([@reservation.booking_post, @reservation], html: {multipart: true}, class: "col s12") do |f| %> 
    <% if @reservation.errors.any? %> 
    <div id="error_explanation"> 
     <h2><%= pluralize(@reservation.errors.count, "error") %> prohibited this post from being saved:</h2> 

     <ul> 
     <% @reservation.errors.full_messages.each do |message| %> 
     <li><%= message %></li> 
     <% end %> 
     </ul> 
    </div> 
    <% end %> 

    <div class="col s6"> 
    <%= f.label :start %> 
    <%= f.date_field :start, placeholder: "start time", class: "datepicker" %> 
    </div> 
    <div class="col s6"> 
    <%= f.label :end %> 
    <%= f.date_field :end, placeholder: "end time", class: "datepicker" %> 
    </div> 
    <div class="col s6"> 
    <%= f.label :reservation_time %> 
    <%= f.time_field :reservation_time, placeholder: "time", class: "timepicker", id: "timepicker", type: "time" %> 
    </div> 

    <div class="input-field col s6"> 
    <%= f.label :name %> 
    <%= f.text_field :name, class: "validate" %> 
    </div> 
    <div class="input-field col s6"> 
    <%= f.label :email %> 
    <%= f.text_field :email, class: "validate" %> 
    </div> 
    <div class="input-field col s6"> 
    <%= f.label :phone_number %> 
    <%= f.text_field :phone_number, class: "validate" %> 
    </div> 

    <div class="waves-effect waves-light btn"> 
    <%= f.submit t(:submit_reservation)%> 
    </div> 

<% end %> 
<br> 
</div> 

我想呈現@booking_post 頁的@reservation錯誤信息（在booking_post_path，而不是在new_reservation_path或其他點兒）。我該怎麼做？

感謝解決方案

Answer 1

在你else塊，請這樣

flash[:notice] = @reservation.errors.full_messages.to_sentence 
    redirect_to @booking_post