Ruby on rails 验证失败后保留嵌套表单字段值_Ruby On Rails_Ruby_Ruby On Rails 3

Ruby on rails 验证失败后保留嵌套表单字段值

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Ruby on rails 验证失败后保留嵌套表单字段值,ruby-on-rails,ruby,ruby-on-rails-3,Ruby On Rails,Ruby,Ruby On Rails 3,我是rails新手，尚未解决以下问题。我使用Desive对名为“用户”的模型进行身份验证。此模型与另一个名为“公司”的模型关联： user.rb class User < ActiveRecord::Base devise :database_authenticatable, :registerable, :confirmable, :recoverable, :rememberable, :trackable, :validatable belongs_

我是rails新手，尚未解决以下问题。我使用Desive对名为“用户”的模型进行身份验证。此模型与另一个名为“公司”的模型关联：

user.rb

  class User < ActiveRecord::Base

  devise :database_authenticatable, :registerable, :confirmable,
         :recoverable, :rememberable, :trackable, :validatable

  belongs_to :company
  accepts_nested_attributes_for :company

  attr_accessible :company_attributes, :email, :password, 
                  :password_confirmation, :remember_me, :company_id

  class Company < ActiveRecord::Base

  has_many :users
  attr_accessible :name
  validates :name, :presence => true, :uniqueness => true

def new
    @user = User.new
    @user.build_company

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @user }
    end
end

def create
  @user = User.new(params[:user])

  respond_to do |format|
    if @user.save
      format.html { redirect_to @user, notice: 'User was successfully created.' }
      format.json { render json: @user, status: :created, location: @user 
    else
      format.html { render action: 'new' }
      format.json { render json: @user.errors, status: :unprocessable_entity }
    end
  end
end

<%= devise_error_messages! %>
<h2>Sign up</h2>
<%= simple_form_for(resource, :as => resource_name, 
                              :url => registration_path(resource_name),
                              :html => {:class => 'form-horizontal' }) do |f| %>

    <%= f.simple_fields_for :company,  @user.build_company do |builder| %>
        <div><%= builder.label :name, "Company" %><br />
        <%= builder.text_field :name, :autofocus => true, 
                            :placeholder => "Example Company Inc.",
                            :required => true %></div>
    <% end %>

  <div><%= f.label :email %><br />
  <%= f.email_field :email, :placeholder => "example@email.com",  :required => true %></div>

  <div><%= f.label :password %><br />
  <%= f.password_field :password,  :required => true %></div>

  <div><%= f.label :password_confirmation %><br />
  <%= f.password_field :password_confirmation,  :required => true %></div>

  <%= f.submit "Sign up", :class => "btn"%>
<% end %>

<%= render "devise/shared/links" %>

# GET company/new
def new
    @company = Company.new
    @company.users.build
end

# POST company/
def create
    @company = Company.new(params[:company])

    respond_to do |format|
      if @company.save
        format.html { redirect_to root_path, notice: 'Welcome! Your account has been created successfully. A confirmation link has been sent to your email address.' }
        format.json { render json:  root_path, status: :created, location: @company }
      else
        format.html { render action: "new" }
        format.json { render json: @company.errors, status: :unprocessable_entity }
      end
    end
end

<h2>Create an account</h2>
<%= simple_form_for( @company, :html => {:class => 'form-horizontal' }) do |f| %>
<%= render 'shared/error_messages', :object => @company %>
    <%= f.input     :name, 
                    :label =>'Company name',
                    :placeholder => "Example Company Inc.",
                    :autofocus => true %>
    <%= f.simple_fields_for :users do |builder| %>
        <%= builder.input   :email, 
                            :placeholder => "example@email.com" %>
        <%= builder.input :password %>
        <%= builder.input :password_confirmation %>
    <% end %>
    <%= f.button    :submit, 'Create account',
                    :class => 'btn'%>
<% end %>
<%= link_to "Sign in", new_session_path(:user) %>

到目前为止，注册是有效的，这意味着如果

@user.save

为真，则在用户和公司模型中分别创建两条记录，并在用户模型的

公司id

列中创建正确的关联

如果

@user.save

为false，例如，因为用户属性电子邮件的验证失败，因为它已经被获取，则会呈现一个新视图。正如所料，

@user

属性（在本例中为电子邮件）将保留，并在

呈现操作：“新建”之后保留在相应的表单字段中。但是，公司属性名称的表单字段显示为空。这是注册页面的视图：
new.html.erb
  class User < ActiveRecord::Base

  devise :database_authenticatable, :registerable, :confirmable,
         :recoverable, :rememberable, :trackable, :validatable

  belongs_to :company
  accepts_nested_attributes_for :company

  attr_accessible :company_attributes, :email, :password, 
                  :password_confirmation, :remember_me, :company_id

  class Company < ActiveRecord::Base

  has_many :users
  attr_accessible :name
  validates :name, :presence => true, :uniqueness => true

def new
    @user = User.new
    @user.build_company

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @user }
    end
end

def create
  @user = User.new(params[:user])

  respond_to do |format|
    if @user.save
      format.html { redirect_to @user, notice: 'User was successfully created.' }
      format.json { render json: @user, status: :created, location: @user 
    else
      format.html { render action: 'new' }
      format.json { render json: @user.errors, status: :unprocessable_entity }
    end
  end
end

<%= devise_error_messages! %>
<h2>Sign up</h2>
<%= simple_form_for(resource, :as => resource_name, 
                              :url => registration_path(resource_name),
                              :html => {:class => 'form-horizontal' }) do |f| %>

    <%= f.simple_fields_for :company,  @user.build_company do |builder| %>
        <div><%= builder.label :name, "Company" %><br />
        <%= builder.text_field :name, :autofocus => true, 
                            :placeholder => "Example Company Inc.",
                            :required => true %></div>
    <% end %>

  <div><%= f.label :email %><br />
  <%= f.email_field :email, :placeholder => "example@email.com",  :required => true %></div>

  <div><%= f.label :password %><br />
  <%= f.password_field :password,  :required => true %></div>

  <div><%= f.label :password_confirmation %><br />
  <%= f.password_field :password_confirmation,  :required => true %></div>

  <%= f.submit "Sign up", :class => "btn"%>
<% end %>

<%= render "devise/shared/links" %>

# GET company/new
def new
    @company = Company.new
    @company.users.build
end

# POST company/
def create
    @company = Company.new(params[:company])

    respond_to do |format|
      if @company.save
        format.html { redirect_to root_path, notice: 'Welcome! Your account has been created successfully. A confirmation link has been sent to your email address.' }
        format.json { render json:  root_path, status: :created, location: @company }
      else
        format.html { render action: "new" }
        format.json { render json: @company.errors, status: :unprocessable_entity }
      end
    end
end

<h2>Create an account</h2>
<%= simple_form_for( @company, :html => {:class => 'form-horizontal' }) do |f| %>
<%= render 'shared/error_messages', :object => @company %>
    <%= f.input     :name, 
                    :label =>'Company name',
                    :placeholder => "Example Company Inc.",
                    :autofocus => true %>
    <%= f.simple_fields_for :users do |builder| %>
        <%= builder.input   :email, 
                            :placeholder => "example@email.com" %>
        <%= builder.input :password %>
        <%= builder.input :password_confirmation %>
    <% end %>
    <%= f.button    :submit, 'Create account',
                    :class => 'btn'%>
<% end %>
<%= link_to "Sign in", new_session_path(:user) %>

不幸的是，这不起作用，到目前为止，我还没有在stackoverflow上发布的其他问题中找到解决方案。我期待您的输入，以便我可以继续构建我的第一个应用；）
提前感谢您的帮助。
多亏了Michal的帮助，我重新安排了我的控制器，以便通过关联公司创建用户，而不是反过来创建用户。相应的公司控制器如下所示：
@company = @user.build_company(params[:company])

公司\u controller.rb
  class User < ActiveRecord::Base

  devise :database_authenticatable, :registerable, :confirmable,
         :recoverable, :rememberable, :trackable, :validatable

  belongs_to :company
  accepts_nested_attributes_for :company

  attr_accessible :company_attributes, :email, :password, 
                  :password_confirmation, :remember_me, :company_id

  class Company < ActiveRecord::Base

  has_many :users
  attr_accessible :name
  validates :name, :presence => true, :uniqueness => true

def new
    @user = User.new
    @user.build_company

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @user }
    end
end

def create
  @user = User.new(params[:user])

  respond_to do |format|
    if @user.save
      format.html { redirect_to @user, notice: 'User was successfully created.' }
      format.json { render json: @user, status: :created, location: @user 
    else
      format.html { render action: 'new' }
      format.json { render json: @user.errors, status: :unprocessable_entity }
    end
  end
end

<%= devise_error_messages! %>
<h2>Sign up</h2>
<%= simple_form_for(resource, :as => resource_name, 
                              :url => registration_path(resource_name),
                              :html => {:class => 'form-horizontal' }) do |f| %>

    <%= f.simple_fields_for :company,  @user.build_company do |builder| %>
        <div><%= builder.label :name, "Company" %><br />
        <%= builder.text_field :name, :autofocus => true, 
                            :placeholder => "Example Company Inc.",
                            :required => true %></div>
    <% end %>

  <div><%= f.label :email %><br />
  <%= f.email_field :email, :placeholder => "example@email.com",  :required => true %></div>

  <div><%= f.label :password %><br />
  <%= f.password_field :password,  :required => true %></div>

  <div><%= f.label :password_confirmation %><br />
  <%= f.password_field :password_confirmation,  :required => true %></div>

  <%= f.submit "Sign up", :class => "btn"%>
<% end %>

<%= render "devise/shared/links" %>

# GET company/new
def new
    @company = Company.new
    @company.users.build
end

# POST company/
def create
    @company = Company.new(params[:company])

    respond_to do |format|
      if @company.save
        format.html { redirect_to root_path, notice: 'Welcome! Your account has been created successfully. A confirmation link has been sent to your email address.' }
        format.json { render json:  root_path, status: :created, location: @company }
      else
        format.html { render action: "new" }
        format.json { render json: @company.errors, status: :unprocessable_entity }
      end
    end
end

<h2>Create an account</h2>
<%= simple_form_for( @company, :html => {:class => 'form-horizontal' }) do |f| %>
<%= render 'shared/error_messages', :object => @company %>
    <%= f.input     :name, 
                    :label =>'Company name',
                    :placeholder => "Example Company Inc.",
                    :autofocus => true %>
    <%= f.simple_fields_for :users do |builder| %>
        <%= builder.input   :email, 
                            :placeholder => "example@email.com" %>
        <%= builder.input :password %>
        <%= builder.input :password_confirmation %>
    <% end %>
    <%= f.button    :submit, 'Create account',
                    :class => 'btn'%>
<% end %>
<%= link_to "Sign in", new_session_path(:user) %>

GET请求的表单嵌套Desive用户模型字段，如下所示：
new.html.erb
  class User < ActiveRecord::Base

  devise :database_authenticatable, :registerable, :confirmable,
         :recoverable, :rememberable, :trackable, :validatable

  belongs_to :company
  accepts_nested_attributes_for :company

  attr_accessible :company_attributes, :email, :password, 
                  :password_confirmation, :remember_me, :company_id

  class Company < ActiveRecord::Base

  has_many :users
  attr_accessible :name
  validates :name, :presence => true, :uniqueness => true

def new
    @user = User.new
    @user.build_company

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @user }
    end
end

def create
  @user = User.new(params[:user])

  respond_to do |format|
    if @user.save
      format.html { redirect_to @user, notice: 'User was successfully created.' }
      format.json { render json: @user, status: :created, location: @user 
    else
      format.html { render action: 'new' }
      format.json { render json: @user.errors, status: :unprocessable_entity }
    end
  end
end

<%= devise_error_messages! %>
<h2>Sign up</h2>
<%= simple_form_for(resource, :as => resource_name, 
                              :url => registration_path(resource_name),
                              :html => {:class => 'form-horizontal' }) do |f| %>

    <%= f.simple_fields_for :company,  @user.build_company do |builder| %>
        <div><%= builder.label :name, "Company" %><br />
        <%= builder.text_field :name, :autofocus => true, 
                            :placeholder => "Example Company Inc.",
                            :required => true %></div>
    <% end %>

  <div><%= f.label :email %><br />
  <%= f.email_field :email, :placeholder => "example@email.com",  :required => true %></div>

  <div><%= f.label :password %><br />
  <%= f.password_field :password,  :required => true %></div>

  <div><%= f.label :password_confirmation %><br />
  <%= f.password_field :password_confirmation,  :required => true %></div>

  <%= f.submit "Sign up", :class => "btn"%>
<% end %>

<%= render "devise/shared/links" %>

# GET company/new
def new
    @company = Company.new
    @company.users.build
end

# POST company/
def create
    @company = Company.new(params[:company])

    respond_to do |format|
      if @company.save
        format.html { redirect_to root_path, notice: 'Welcome! Your account has been created successfully. A confirmation link has been sent to your email address.' }
        format.json { render json:  root_path, status: :created, location: @company }
      else
        format.html { render action: "new" }
        format.json { render json: @company.errors, status: :unprocessable_entity }
      end
    end
end

<h2>Create an account</h2>
<%= simple_form_for( @company, :html => {:class => 'form-horizontal' }) do |f| %>
<%= render 'shared/error_messages', :object => @company %>
    <%= f.input     :name, 
                    :label =>'Company name',
                    :placeholder => "Example Company Inc.",
                    :autofocus => true %>
    <%= f.simple_fields_for :users do |builder| %>
        <%= builder.input   :email, 
                            :placeholder => "example@email.com" %>
        <%= builder.input :password %>
        <%= builder.input :password_confirmation %>
    <% end %>
    <%= f.button    :submit, 'Create account',
                    :class => 'btn'%>
<% end %>
<%= link_to "Sign in", new_session_path(:user) %>

创建一个帐户
{:class=>'form horizontal'}）do | f |%>
@公司%>
“公司名称”，
：占位符=>“示例公司”，
：自动对焦=>true%>
"example@email.com" %>
'btn'>

现在，如果验证失败，所有实例属性值将保留在各自的表单字段中。
这可能不是原因，但您使用简单表单作为资源，而字段作为：company。尝试changind fields\u for->simple\u fields\u for并查看它！嘿，迈克，谢谢你的快速回复。我刚刚将

的

f.fields\u更改为

的

f.simple\u fields\u。不幸的是，验证失败后，“公司名称”字段将变为空白。将此行
更改为
。此外，我怀疑Deavise在这里搞乱了一些东西/不幸的是，我没有自己的代码与这种关系（只有用户在注册时以一种形式创建了许多其他对象）。也许可以尝试将其分为两个单独的表单，并使用ajax加载第二个表单？更改该行也不能解决问题。但是，“公司名称”字段将不会呈现。因此，我假设users\u controller.rb中我的new
方法中的@user.build\u company
行没有创建可以保存name属性的company实例。这有意义吗？