ActionMailer link_to show action does not work with "missing required keys: [: id]"

Question

I am trying to put a link to show the action in the view represented by rails action mailer.

mailer.rb

class Mailer < ActionMailer::Base
  default from: "[e-mail]"

  def catalog_download_request(email, catalog)
    @catalog = catalog

    mail({
         to: email
    })
  end

end

routes.rb

Rails.application.routes.draw do

  scope "(:locale)" do
    resources :catalogs, :path => I18n.t("routes.catalogs"), only: [:index, :show]
  end

end

development.rb:

config.action_mailer.default_url_options = { host: "http://localhost:3000" }
config.action_mailer.asset_host = "http://localhost:3000"

config.action_mailer.delivery_method = :smtp

config.action_mailer.smtp_settings = {
  address: "localhost",
  port: 1025
}

config.action_mailer.raise_delivery_errors = false

My model where I call in the mail:

class CatalogDownloadRequest < ActiveRecord::Base
  belongs_to :catalog

  after_create :send_mail

  private

  def send_mail
    Mailer.catalog_download_request(email, catalog).deliver
  end

end

What I tried in my opinion:

<%= link_to @catalog %>

Error:

ActionView :: Template :: Error: no route mappings {: action => "show" ,: controller => "catalogs" ,: format => nil ,: id => nil ,: locale => #} missing required keys: [: id]

Another attempt:

<%= link_to catalog_url(@catalog) %>

Error:

ActionView :: Template :: Error: no route matches {: action => "index"}

I suspect this is due to my locality on the routes.

If I use <%= link_to catalog_url(@catalog) %>in a different view, it works.

It is decided:

<%= link_to catalog_url(:id => @catalog.id), catalog_url(:id => @catalog.id) %>

Answer 1

ActionView::Template::Error: No route matches {:action=>"index"} :

link_to ( URL) (api). . , , .

, , nil , url .