多对多嵌套表单，在嵌套表单 + 集合上具有附加属性 select

问题描述

我是一名 Rails 学生，正在寻求有关嵌套表单的帮助。我的项目由四个模型组成：Users、Trips（想想：行程）和 Eatery，以及 EateryTrips，它将 Trips 和 Eateries 作为连接模型连接起来，具有双向多通道关系。

我正在尝试向我的嵌套表单添加一个集合选择（在添加集合选择之前效果很好）。我实际上不确定收藏精选的最佳地点在哪里。

这是我的上下文模型：

class User < ApplicationRecord
  has_many :trips,dependent: :destroy

  validates :name,:presence => true
  validates :email,:uniqueness => true
  validates :email,email: true
  
  has_secure_password
end


class EateryTrip < ApplicationRecord
    belongs_to :eatery
    belongs_to :trip 

    validates_uniqueness_of :eatery_id,scope: [:trip_id]

    accepts_nested_attributes_for :eatery,allow_destroy: true

    scope :visited,-> { where("visit_date < ?",Time.Now ) } 
end

class Eatery < ApplicationRecord
    has_many :eatery_trips                                         
    has_many :trips,through: :eatery_trips   
    
    validates :city,:presence => true
    validates :state,:presence => true
    validates :name,:presence => true
    validates :about,:presence => true
    validates :food_categories,:presence => true
    validates :dishes,:presence => true
end

class Trip < ApplicationRecord
    has_many :eatery_trips                                         
    has_many :eateries,through: :eatery_trips

    validates :title,:presence => true
    validates :description,:presence => true

    accepts_nested_attributes_for :eatery_trips,allow_destroy: true
end

我的行程控制器目前如下所示：

class TripsController < ApplicationController
    before_action :verify_user,except: [:show,:index]
    before_action :find_user_by_id,except: [:new,:index]
    before_action :find_trip_by_id,only: [:show,:edit,:update]

    def new
      @user = current_user
      @trip = @user.trips.build
      # 3.times { @trip.eatery_trips.build }
      3.times { @trip.eatery_trips.build.build_eatery }
    end
   
    def create
      @trip = @user.trips.new(trip_params)
      if @trip.save
        redirect_to user_trip_path(@user,@trip)
      else
        render :new 
      end
    end

Trips 控制器中的强参数如下所示：

def trip_params 
        params.require(:trip).permit(:title,:description,:eatery_trips_attributes => [:id,:visit_date,:review,:eatery_id,:eatery_attributes => [:city,:state,:name,:about,:food_categories,:dishes,:id]])
    end

我创建新的嵌套表单：

<% require 'pry' %>
<%= form_for [@user,@trip] do |trip_form| %>
    <% if @trip.errors.any? %>
      <div id="error_explanation">
        <h2><%= pluralize(@trip.errors.count,"error") %> prohibited this post from being saved:</h2>
          <% @trip.errors.full_messages.each do |message| %>
           <ul>
           <li><%= message %></li>
           </ul>
          <% end %>
      </div>
    <% end %>

    <div id="trip">
      <%= trip_form.label :itinerary_title %>
      <%= trip_form.text_area :title,placeholder: "Ex: Brunch and Breweries in Savannah",size: "50%" %> <br /><br />
      <%= trip_form.label :description %>
      <%= trip_form.text_area :description,placeholder: "Ex: Southern Road Trip 2021",size: "50%" %><br /><br />
    </div>

  
    <div id="eatery_trip_attributes">
      <%= trip_form.fields_for :eatery_trips do |eatery_trip_form| %> 

        <%= eatery_trip_form.label :intended_visit_date %>
        <%= eatery_trip_form.date_field :visit_date %><br /><br />
        <%= eatery_trip_form.label :review_after_meal %>
        <%= eatery_trip_form.text_area :review,placeholder: "Add notes here during or after your road trip." %><br /><br />
    

        
        <h2>Select existing eatery or create a new one below.</h2>
        <%= eatery_trip_form.collection_select(:eatery_id,Eatery.all,:id,prompt: true) %> <br /><br />


      <div id="eatery_attributes">
        <%= eatery_trip_form.fields_for :eatery do |eatery_form| %> 
        <ul>
          <%= eatery_form.label :city %>
          <%= eatery_form.text_field :city,placeholder: "Ex: Savannah" %><br /><br />
          <%= eatery_form.label :state %>
          <%= eatery_form.text_field :state,placeholder: "Ex: GA" %><br /><br />
          <%= eatery_form.label :name %>
          <%= eatery_form.text_field :name,placeholder: "Cotton & Rye" %><br /><br />
          <%= eatery_form.label :about %>
          <%= eatery_form.text_field :about,placeholder: "Pro tip: Book a private dinner inside the original bank vault.",size: "50%" %><br /><br />
          <%= eatery_form.label :food_categories %>
          <%= eatery_form.text_field :food_categories,placeholder: "Southern food,dinner,dessert",size: "50%" %><br /><br />
          <%= eatery_form.label :dishes %>
          <%= eatery_form.text_field :dishes,placeholder: "Crispy chicken wings,peanut butter pie",size: "50%" %><br /><br />
        </ul>
      </div>
        <% end %> 
      <% end %> 
    </div>

   

<%= render "submit_button" %>
<% end %> 
 

到目前为止，它出现在正确的位置，我可以看到下拉列表中添加的所有餐馆。

问题： 我如何为用户添加从 collection_select 下拉菜单中选择餐馆或在嵌套表单中创建新餐馆的选项？ 我是否应该关闭对这些属性的验证，以便在我从下拉列表中选择时不会出错？谢谢。

解决方法

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