Activerecord 在用户存在之前，为“设计注册”中的嵌套\u属性设置用户\u id

这个想法很简单。我需要一个嵌套属性

标记

，用于用户注册<代码>标签需要

用户id

视图

<%= form_for(resource, as: resource_name, url: registration_path(resource_name), html: {role: :form}) do |f| %>
  <%= f.fields_for :tags, resource.tags.build do |a| %>
    <%= a.text_field :tagname %>
  <% end %>
<% end %>

保存功能目前未被触及。表单传递嵌套属性：tagname刚刚好。但是我无法从

资源

获取“将是”的

用户id

我已经在网上找了好几个小时的答案了。没有出现任何问题，但是在保存初始用户对象之后应该保存嵌套属性的想法听起来像是一个可行的解决方案。但它不再作为嵌套属性处理

谢谢你的帮助！谢谢

解决方案 好吧，我解决了。我对我的Desive注册控制器做了一点改动，但效果不错

首先，我从标记模型中删除了用户id验证

class Tag < ActiveRecord::Base
  belongs_to :user
  validates_uniqueness_of :tagname
end

我已经在我的designe locales文件中为错误字符串的翻译定义了

：tag_take

和

：need_tag

一切正常！ 为了记录在案，这是对问题中现有代码的补充

class Tag < ActiveRecord::Base
  belongs_to :user
  validates_presence_of :user_id
  validates_uniqueness_of :tagname
end

class User < ActiveRecord::Base
  has_many :tags, autosave: true, dependent: :destroy
  accepts_nested_attributes_for :tags
end

def configure_permitted_parameters
  devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(
          :tags_attributes => [:id, :user_id, :tagname]
        ) }

class Tag < ActiveRecord::Base
  belongs_to :user
  validates_uniqueness_of :tagname
end

def create
  build_resource(sign_up_params)

  # added code begins here
  @tag = nil
  @tag.define_singleton_method(:valid?) {false}
  if params["user"].has_key? "tags_attributes"
    @tag = Tag.new(params["user"].delete("tags_attributes").values.first)
    if @tag.valid?
      resource_saved = resource.save # original line of code
    else
      resource.errors.add(*@tag.errors.first)
      flash.delete :tagname_error
      set_flash_message :alert, :tag_taken if is_flashing_format?
    end
  else
    set_flash_message :alert, :need_tag if is_flashing_format?
  end
  # end added code

  yield resource if block_given?
  if resource_saved
    if resource.active_for_authentication?
      set_flash_message :notice, :signed_up if is_flashing_format?
      sign_up(resource_name, resource)

      # This is where current_user has been created and resource.id == current_user.id

      # begin added code
      @tag.user_id= resource.id
      # end added code

      respond_with resource, location: after_sign_up_path_for(resource)
    else
      set_flash_message :notice, :"signed_up_but_#{resource.inactive_message}" if is_flashing_format?
      expire_data_after_sign_in!
      respond_with resource, location: after_inactive_sign_up_path_for(resource)
    end
  else
    clean_up_passwords resource
    @validatable = devise_mapping.validatable?
    if @validatable
      @minimum_password_length = resource_class.password_length.min
    end
    respond_with resource
  end
end