Question

我正在处理this Epicodus lesson 并且我刚刚为新视图和编辑视图重构了我的表单，但是新的＆amp;编辑操作无效。提交更新时，我收到“名称不能为空”错误。

这是我的新作，创作，编辑和播放更新我的contacts_controller中的操作：

def new
  @contact = Contact.new
end

def create
  @contact = Contact.new name: params[:name],
                          email: params[:email],
                            phone: params[:phone]
  if @contact.save
    flash[:notice] = "#{@contact.name} added."
    redirect_to contacts_path
  else
    render 'new'
  end
end

def edit
  @contact = Contact.find(params[:id])
end

def update
  @contact = Contact.find(params[:id])
  if @contact.update name: params[:name],
                      email: params[:email],
                        phone: params[:phone]
    flash[:notice] = 'Contact updated.'
    redirect_to contact_path(@contact)
  else
    render 'edit'
  end
end

我的编辑视图：

<% content_for(:title, "Edit #{@contact.name} | Wikipages") %>

<h1>Edit <%= @contact.name %></h1>

<%= render 'errors'%>
<%= render 'form'%>

<p><%= link_to 'Return to contacts', '/contacts' %></p>

我的新观点：

<% content_for(:title, "New contact | Wikipages") %>

<h1>New contact</h1>

<%= render 'errors'%>
<%= render 'form'%>

<p><%= link_to 'Return to contacts', '/contacts', class: 'btn btn-default' %></p>

我的表格部分：

<%= form_for(@contact) do |f| %>
  <div class="form-group">
    <%= f.label :name %>
    <%= f.text_field :name %>
  </div>
  <div class="form-group">
    <%= f.label :phone %>
    <%= f.text_field :phone %>
  </div>
  <div class="form-group">
    <%= f.label :email %>
    <%= f.text_field :email %>
  </div>
  <%= f.submit(class: "btn btn-primary")%>
<% end %>

我的路线：

Rails.application.routes.draw do
  root 'contacts#index'

  resources :contacts do
    resources :phones
  end
end

以下是我的日志输出：

Started POST "/contacts" for 127.0.0.1 at 2014-09-23 07:00:34 -0400
Processing by ContactsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"q59xzpBWXEs58qStmPcnpEqm89finUQKiUvYsjRYm8Q=", "contact"=>{"name"=>"Lance", "phone"=>"", "email"=>""}, "commit"=>"Create Contact"}
   (2.1ms)  BEGIN
   (0.2ms)  ROLLBACK
  Rendered contacts/_errors.html.erb (0.6ms)
  Rendered contacts/_form.html.erb (3.2ms)
  Rendered contacts/new.html.erb within layouts/application (6.0ms)
Completed 200 OK in 214ms (Views: 207.5ms | ActiveRecord: 2.3ms)

以下是编辑日志的输出：

Started PATCH "/contacts/12" for 127.0.0.1 at 2014-09-23 06:48:02 -0400
Processing by ContactsController#update as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"q59xzpBWXEs58qStmPcnpEqm89finUQKiUvYsjRYm8Q=", "contact"=>{"name"=>"Chuck Wight", "phone"=>"435345345e", "email"=>"desfwrf@er.com"}, "commit"=>"Update Contact", "id"=>"12"}
  Contact Load (0.3ms)  SELECT  "contacts".* FROM "contacts"  WHERE "contacts"."id" = $1 LIMIT 1  [["id", 12]]
   (0.1ms)  BEGIN
   (0.4ms)  ROLLBACK
  Rendered contacts/_errors.html.erb (0.5ms)
  Rendered contacts/_form.html.erb (4.4ms)
  Rendered contacts/edit.html.erb within layouts/application (7.2ms)
Completed 200 OK in 208ms (Views: 201.0ms | ActiveRecord: 0.8ms)

有什么想法吗？

Answer 1

您的params嵌套在联系中，您正在将params直接传递给您的创建和更新操作。因此，请尝试paarams[:contact][:email]而不是params[:email]

像这样：

def create
  @contact = Contact.new name: params[:contact][:name],
                          email: params[:contact][:email],
                            phone: params[:contact][:phone]
  if @contact.save
    flash[:notice] = "#{@contact.name} added."
    redirect_to contacts_path
  else
    render 'new'
  end
end


def update
  @contact = Contact.find(params[:id])
  if @contact.update name: params[:contact][:name],
                      email: params[:contact][:email],
                        phone: params[:contact][:phone]
    flash[:notice] = 'Contact updated.'
    redirect_to contact_path(@contact)
  else
    render 'edit'
  end
end

显然，在您的更新操作中，您的@contact为零。因此，请尝试在控制器操作中进行更改。希望这能帮助你。

Rails - New＆amp;编辑不使用form_for

1 个答案: