为模型实现 edit/update 功能时出现问题

Problem implementing edit/update functionality for model

当我尝试编辑 Job 模型的实例时,我尝试更新的属性设置为 Nil。

我试过使用常规的 form_for 帮助程序而不是 simple_form,因为我不知道 simple_form 是否需要额外的信息,例如要使用的操作和方法,但是没用。

edit.html.erb

<h1>Edit Job:</h1>
<br>
<%= simple_form_for @job do |f| %>
  <%= f.input :title, label: "Job title" %>
  <%= f.input :description, label: "Description" %>
  <%= f.button :submit %>
<% end %>

jobs_controller.rb

  def edit
    @job = Job.find(params[:id])
  end

  def update
    @job = Job.find(params[:id])
    @job.update(title: params[:title], description: params[:description])

    if @job.save
      redirect_to jobs_path(@job)
    else
      render "edit"
    end
  end

routes.rb

  resources :candidates
  resources :tenants, constraints: { subdomain: 'www' }, except: :index
  resources :jobs, path_names: { new: 'add' }
  get 'candidates/index'
  get 'candidates/new/:id' => 'candidates#new', :as => 'apply'
  get 'candidates/single/:id' => 'candidates#single', :as => 'view_candidate'
  get 'jobs/single/:id' => 'jobs#single', :as => 'single_job'
  get 'add-job' => 'jobs#new'
  get 'listings' => 'jobs#listings', :as => 'career_page'
  get 'listing/:id' => 'jobs#listing', :as => 'view_job'
  get 'welcome/index', constraints: { subdomain: 'www' }
  get 'dashboard' => 'tenants#dashboard', as: 'dashboard'
  constraints SubdomainConstraint do
    devise_for :users, path_names: { edit: 'account' }
    root 'tenants#dashboard'
  end

  root 'welcome#index'

没有错误,但是属性为Nil,在索引视图中显示URL而不是@job.title(因为它是Nil)

我认为表单数据被包装到 params 中的键 :job 中,因此 Job 的属性需要列入白名单

  def update
    @job = Job.find(params[:id])
    @job.update(job_params)

    if @job.save
      redirect_to jobs_path(@job)
    else
      render "edit"
    end
  end

Private
  def job_params
    params.require(:job).permit(:title, :description)
  end