找不到带有 'id'= 的 'Model'

Question

我不太明白为什么这不起作用。不知何故，我的服务 ID 根本没有通过。我想我对 ID 感到困惑，但这应该可以，但不能。当我点击提交时，它告诉我：找不到带有 'id'= 的服务

这是我的代码：

enquires_controller.rb

class EnquiresController < ApplicationController
  before_action :set_enquire, only: [:create, :new]

  def new
    @enquire = Enquire.new
  end

  def create
    @enquire = Enquire.new(enquire_params)
    @enquire.service = @service
    if user_signed_in?
      @user = current_user
    end
    if @enquire.save
      flash[:thanks] = "Thank you"
      redirect_to service_path(@service)
    else
      render :new
    end
  end

  private

  def set_enquire
    @service = Service.find(params[:service_id])
  end

  def enquire_params
    params.require(:enquire).permit(:first_name, :last_name, :company, 
                                    :message, :email, :phone_number, 
                                    :service_id )
  end

查询.rb

class Enquire < ApplicationRecord
  belongs_to :service
  validates :first_name, presence: true
  validates :last_name, presence: true
  validates :company, presence: true
  validates :message, presence: true
  validates :email, presence: true
  validates :service_id, presence: true
end

使用 @service 的服务视图
show.html.erb

<%= link_to 'Enquire about this Service', new_enquire_path(@service), 
class: "btn btn-primary enquire-btn text-middle" %>

服务.rb

has_many :enquires, :dependent => :destroy

routes.rb

resources :services do
  resources :enquires, only: [ :new, :create ]
end

resources :enquires, only: [ :new, :create, :index, :show, :destroy ]

最后查询表格 _form.html.erb

<%= simple_form_for(@enquire) do |f| %>
  <% if user_signed_in? %>
    <div class="form-inputs" id="session-form">
      <%= f.input :first_name, as: "hidden", input_html: { value: @user.first_name } %>
      <%= f.input :last_name, as: "hidden", input_html: { value: @user.last_name } %>
      <%= f.input :email, as: "hidden", input_html: { value: @user.email } %>
      <%= f.input :company, as: "hidden", input_html: { value: @user.company_name } %>
      <%= f.input :phone_number, autofocus: true, placeholder: "Phone Number", label:false %>
      <%= f.input :message, autofocus: true, :input_html => { id: "no-resize" }, placeholder: "Message", label:false %>
    </div>
  <% else %>
    <div class="form-inputs" id="session-form">
      <%= f.input :first_name, required: true, autofocus: true, placeholder: "First Name", label:false %>
      <%= f.input :last_name, required: true, autofocus: true, placeholder: "Last Name", label:false %>
      <%= f.input :email, required: true, autofocus: true, placeholder: "Email", label:false %>
      <%= f.input :company, required: true, autofocus: true, placeholder: "Company", label:false %>
      <%= f.input :phone_number, autofocus: true, placeholder: "Phone Number", label:false %>
      <%= f.input :message, autofocus: true, :input_html => { id: "no-resize" }, placeholder: "Message", label:false %>
    </div>
  <% end %>

  <div class="row">
    <div class="col-xs-12">
      <div class="form-actions text-center">
        <%= f.button :submit, "Submit Enquiry", class: "gen-create-btn" %>
      </div>
    </div>
  </div>
<% end %>

点击提交时我得到的参数是：

"✓", "authenticity_token"=>"xcqR44gPOI7gsN47ddnqKxKuTcaB1Pi5goLa5H81oecbDD7nxE/A1J4KR7rY0Dbyndgz6BrFKzukkTbOCjoGMg==", "enquire"=>{"first_name"=>"daadadad", "last_name"=>"adadada," dadad", "company"=>"adada", "phone_number"=>"dadad", "message"=>"adada"}, "commit"=>"提交查询", "controller"=>"enquires", "action"=>"create"} 允许：false>

编辑：

也许服务显示方法与它有关？
services_controller.rb

def show
  @service = Service.find(params[:id])
  @user = current_user  
end

Answer 1

您有 before_action :set_enquire, only: [:create, :new]，它将被 new 和 create 方法调用。

def set_enquire
  @service = Service.find(params[:service_id])
end

当你查看create方法中的params时，没有service_id，所以params[service_id]是nil。所以它失败了Couldn't find Service with 'id'=

解决方案：

删除before_action for create 方法

before_action :set_enquire, only: [:new]

并且由于@service 在new 方法中可用，将service_id 作为hidden_field 发送表单中的hidden_field

<%= f.hidden_filed :service_id, @service %>

并在create 方法中，添加以下行

@service = Service.find(params[:enquire][:service_id])

或者

除了resources :enquires，我看到你还有services和enquires的嵌套资源，所以你可以像下面这样使用它们

<%= simple_form_for [@service, @enquire] do |f| %>

注意：

请将set_enquire 更改为set_service，因为您定义的是service 而不是enquiry

更新：

你也应该改变

<%= link_to 'Enquire about this Service', new_enquire_path(@service), 
class: "btn btn-primary enquire-btn text-middle" %>

到

<%= link_to 'Enquire about this Service', new_service_enquire_path(@service), 
class: "btn btn-primary enquire-btn text-middle" %>

所以params 正确传递。

Answer 2

我认为您的问题来自您的 routes.rb 中查询资源的两条路由，如果您的对象来自第二个资源 :enquires 它将产生错误，因为它找不到作为服务的“父”路由。

resources :services do
  resources :enquires, only: [ :new, :create ]
end

resources :enquires, only: [ :new, :create, :index, :show, :destroy ]