- mình có 2 controllers khác nhau: users_controller và contact_details_controller
- nhưng trong views/users/edit mình muốn thêm vào form new của contact_details thì hướng giải quyết ra sao nhỉ?
- mình có tham khảo một số cách làm thì dùng form_tag url_for đến controllers và action name của contact_details_controller
- nhưng hiện tại thì mình đã implement các action name cho mỗi controller xong hết rồi
- sample code của mình:
```
class UserController < UserDashboardController
  include Devise::Controllers::Helpers
  include ContactDetailHelper
  before_action :authorize_resource
  after_action :verify_authorized, except: :index
  helper DeviseHelper
  def update
    prev_unconfirmed_email = @user.unconfirmed_email if @user.respond_to?(:unconfirmed_email)
    if @user.update_with_password(updated_params)
      message = update_needs_confirmation?(@user, prev_unconfirmed_email) ? I18n.t('devise.registrations.update_needs_confirmation') : I18n.t('devise.registrations.updated')
      flash[:notice] = message
      sign_in :user, @user, bypass: true
      redirect_to user_path
    else
      message = require_current_password? ? I18n.t('devise.passwords.need_current_password') : I18n.t('devise.failure.update_failed')
      flash[:error] = message
      clean_up_passwords @user
      render :edit
    end
  end
  def my_account
  end
  protected
  def require_current_password?
    # Set new password or update new email
    !secure_params[:password].blank? || (!secure_params[:email].blank? && secure_params[:email] != @user.email)
  end
  def update_needs_confirmation?(resource, previous)
    resource.respond_to?(:pending_reconfirmation?) &&
        resource.pending_reconfirmation? &&
        previous != resource.unconfirmed_email
  end
  def authorize_resource
    @user = current_user
    authorize @user
  end
  def clean_up_passwords(object)
    object.clean_up_passwords if object.respond_to?(:clean_up_passwords)
  end
  private
  def secure_params
    params.require(:user).permit(:first_name, :last_name, :password, :current_password)
  end
  def updated_params
    params.require(:user).permit(:password, :current_password)
  end
end
```
```
class ContactDetailController < UserDashboardController
  before_action :load_parent_and_build_objects
  after_action :verify_authorized, except: :index
  def new
  end
  def edit
  end
  def create
    @contact_detail.attributes = secure_params
    if @contact_detail.save
      flash.notice = I18n.t('messages.creating_successful', object_name: I18n.t('contact_detail', scope: 'activerecord.models'))
      redirect_to after_create_contact_detail_link
    else
      render :new
    end
  end
  def update
    if @contact_detail.update_attributes(secure_params)
      flash.notice = flash.notice = I18n.t('messages.updating_successful', object_name: I18n.t('contact_detail', scope: 'activerecord.models'))
      redirect_to smart_parent_contact_detail_link(:edit, @parent_object)
    else
      render :edit
    end
  end
  protected
  def load_parent_and_build_objects
    @user = current_user
    contactable_type = params[:contactable_type]
    @parent_object ||= case contactable_type
                         when 'corporate_investor'
                           @user.corporate_investor
                         else
                           @user
                       end
    if ['new', 'create'].include?(params[:action])
      @contact_detail = @parent_object.contact_detail
      if @contact_detail.present? && @contact_detail.persisted?
        redirect_to smart_parent_contact_detail_link(:edit, @parent_object)
      else
        authorize @parent_object, :create_contact_detail?
        @contact_detail = @parent_object.build_contact_detail
      end
    else
      authorize @parent_object, :contact_detail?
      @contact_detail = @parent_object.contact_detail
    end
  end
  def after_create_contact_detail_link
    parent_object = @contact_detail.contactable
    if parent_object.is_a?(CorporateInvestor)
      new_corporate_investor_bank_account_path(parent_object)
    else
      smart_parent_contact_detail_link(:edit, parent_object)
    end
  end
  def smart_parent_contact_detail_link(action, parent_object)
    route_name = "#{action}_#{parent_object.model_name.singular_route_key}_contact_detail_path"
    send_params = []
    send_params << parent_object unless parent_object.is_a?(User)
    send(route_name, *send_params)
  end
  private
  def secure_params
    params.require(:contact_detail).permit(policy(@parent_object).permitted_contact_detail_attribute)
  end
end
```