ruby-on-rails - Rails + Devise 嵌套注册表未定义方法 'build_address'

Question

你好这个问题与this one基本相同，没有回应。我正在尝试合并 Devise 注册表单以包含不仅生成“用户”而且生成“客户”对象、该客户的“帐户”对象以及该客户的“地址”的字段。

当访问者点击“注册”时，注册表单应包括标准的 Devise 内容，以及用于创建其他对象的字段。相反，我收到此错误:

NoMethodError in Registrations#new

undefined method `build_address' for # Extracted source (around line #6):

    <div class="panel panel-default" style="width: 14em;">  
 <% resource.build_customer if resource.customer.nil? %>
 <% resource.build_account if resource.accounts.nil? %>
 <% resource.build_address if resource.address.nil? %>
 <%= form_for(resource, as: resource_name, url: >registration_path(resource_name)) do |f| %>
   <%= devise_error_messages! %>
   <h3>User Info</h3>

这里没有解释所有的关系，而是模型:

user.rb

    class User < ActiveRecord::Base
      before_create :generate_id

      # Virtual attribute for authenticating by either username or email
      # This is in addition to a real persisted field like 'username'
      attr_accessor :login

      has_one :administrator

      has_one :customer
      has_many :accounts, through: :customer
      accepts_nested_attributes_for :customer, :allow_destroy => true
      accepts_nested_attributes_for :accounts, :allow_destroy => true

      has_one :address, through: :customer
      accepts_nested_attributes_for :customer, :allow_destroy => true
      accepts_nested_attributes_for :address, :allow_destroy => true

      validates_uniqueness_of :email, :case_sensitive => false
      validates_uniqueness_of :id
      validates :username,
        :presence => true,
        :uniqueness=> {
            :case_sensitive => false
        }

      # User ID is a generated uuid
      include ActiveUUID::UUID
      natural_key :user_id, :remember_created_at
      belongs_to :user
      # specify custom UUID namespace for the natural key
      uuid_namespace "1dd74dd0-d116-11e0-99c7-5ac5d975667e"

      # Include default devise modules. Others available are:
      # :confirmable, :lockable, :timeoutable and :omniauthable
      devise :database_authenticatable, :registerable, :timeoutable,         :recoverable, :trackable, :validatable

      # Generate a random uuid for new user id creation
      def generate_id
        self.id = SecureRandom.uuid
      end

      # Allow signin by either email or username ("lower" function might have to be removed?)
      def self.find_for_database_authentication(warden_conditions)
          conditions = warden_conditions.dup
          if login = conditions.delete(:login)
            where(conditions.to_h).where(["lower(username) = :value OR         lower(email) = :value", { :value => login.downcase }]).first
          else
            where(conditions.to_h).first
          end
        end  
    end

customer.rb

   class Customer < ActiveRecord::Base
        belongs_to :user
        has_one :address
        has_many :accounts

        validates :phone1, :firstname, :lastname, presence: true
   end 

account.rb

    class Account < ActiveRecord::Base
        belongs_to :customer
        belongs_to :user
        has_one :acct_type
        has_many :acct_transactions

        validates :acct_type, presence: true
    end

地址.rb

     class Address < ActiveRecord::Base
       belongs_to :customer
       belongs_to :user

       validates :zip_code, presence: true
       validates :address1, presence: true

       has_one :zip_code
       has_one :state, through: :zip_code
     end

有问题的两个 Controller :registrations_controller.rb

    class RegistrationsController < Devise::RegistrationsController

        before_filter :configure_permitted_parameters

        # GET /users/sign_up
      def new
        @user = current_user
        @customer = nil #@user.customer
        @account = nil #@customer.account
        @address = nil #@customer.address

        # Override Devise default behavior and create a customer, account, and address as well
        build_resource({})
            resource.build_customer
        respond_with self.resource

        build_resource({})
            resource.build_account
        respond_with self.resource

        build_resource({})
            resource.build_address
        respond_with self.resource

      end

      protected

      def configure_permitted_parameters
        devise_parameter_sanitizer.for(:sign_up) { |u|
          .permit(:username, :email, :password, :password_confirmation,
                   :customer_attributes => [:phone1, :phone2, :title, :firstname, :lastname],
                   :account_attributes => :acct_type,
                   :address_attributes => [:address1, :address2, :zip_code])
        }
      end
    end

addresses_controller.rb(重要部分)

      def new
        @customer = current_user.customer
        @address = @customer.address.build(:customer_id => @customer.id,
                                  :address1 => nil,
                                  :address2 => nil,
                                  :zip_code => nil)
      end

      def create
        @customer = current_user.customer
        @address = @customer.address.build(:customer_id => @customer.id,
                                  :address1 => nil,
                                  :address2 => nil,
                                  :zip_code => nil)

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

这是引发异常的 View (它真的很长，所以实际上是重要的部分):

    <h1>Create an account</h1>
    <div class="form-group">
    <div class="panel panel-default" style="width: 14em;">  
        <% resource.build_customer if resource.customer.nil? %>
        <% resource.build_account if resource.accounts.nil? %>
        <% resource.build_address if resource.address.nil? %>
        <%= form_for(resource, as: resource_name, url:         registration_path(resource_name)) do |f| %>
          <%= devise_error_messages! %>
          <h3>User Info</h3>
            <div class="form-group">
              <!-- fields for User object -->
              <div class="field">
                <%= f.label :username %><br />
                <%= f.text_field :username, autofocus: true  %>
              </div>
    ...
    <!-- fields for Customer object -->
      <%= f.fields_for :customer do |customer_fields| %>
        <div class="field">
          <%= customer_fields.label :firstname %>
          <%= customer_fields.text_field :firstname %>
        </div>
    ...
    <!-- fields for Account object -->
      <%= f.fields_for :account do |account_fields| %>
        <div class="field">
          <%= account_fields.label :acct_type %>
          <%= account_fields.text_field :acct_type %>
        </div>
      <% end %>

    <!-- fields for Address object -->
      <%= f.fields_for :address do |address_fields| %>
        <div class="field">
          <%= address_fields.label :address1 %>
          <%= address_fields.text_field :address1 %>
        </div>
    ...

异常指向顶部的语句 block ...

    <% resource.build_customer if resource.customer.nil? %>
    <% resource.build_account if resource.accounts.nil? %>
    <% resource.build_address if resource.address.nil? %>

...这之前给我带来了麻烦。在出现当前错误之前，我从第二行(“build_account”)得到了类似的错误。但事实证明这是一个多元化问题，我相信我已经解决了。由于 HTML 是顺序读取的，因此前两个 build_ 方法似乎没有问题。为什么 build_address 方法会出现问题？

我需要先修复这个错误，然后才能知道整个事情是否真的有效。有什么想法吗？

谢谢这是 Rails 4.1.8/Devise 3.4.1

Answer 1

问题出在我使用创建多个资源对象的语法上。它会通过一个，但忽略其余的。我最终为使其工作(或至少使错误消失)所做的是覆盖 build_resource 方法以接受每个要实例化的对象的参数数组:

    def new
        @user = current_user

        build_resource({})
            self.resource[:customer => Customer.new, :account => Account.new, :address => Address.new]
        respond_with self.resource
      end

      def build_resource(hash=nil)
            hash ||= params[resource_name] || {}
            self.resource = resource_class.new(hash)
      end

      def create
        # Override Devise default behavior and create a customer, account, and address as well
        resource = build_resource(params[:user])

        if(resource.save)
          sign_in(resource_name, resource)
          respond_with resource, :location => after_sign_up_path_for(resource)
        else
          render :action => "new"
        end
      end

另外，我删除了表单 View 顶部的三行，因为它们试图在 View 中进行某种预验证，结果导致了问题。提交表单时会进行大量验证。这似乎是在做一件好事。现在我正在使用表单 View ，但在渲染每个部分时遇到了问题。 Fields_for 是为 User 和 Account 模型渲染字段，而不是 Customer 或 Address。