http://ikm.hatenablog.jp/entry/2015/04/12/023405

links_helper.rb

module LinksHelper
  def show_link_to(*records, &block)
    options       = polymorphic_path(records.flatten)
    html_options  = { class: "btn btn-info btn-sm" }

    link_to t(:show), options, html_options, &block
  end

  def new_link_to(*records, &block)
    records = records.flatten
    
    model = records.pop
    model = model.class unless model.is_a?(Class)
    
    options       = polymorphic_path([records, model].flatten, action: :new)
    html_options  = { class: "btn btn-success btn-sm" }

    link_to t(:new), options, html_options, &block
  end

  def edit_link_to(*records, &block)
    options       = polymorphic_path(records.flatten, action: :edit)
    html_options  = { class: "btn btn-warning btn-sm" }

    link_to t(:edit), options, html_options, &block
  end

  def destroy_link_to(*records, &block)
    options       = polymorphic_path(records.flatten)
    html_options  = {
      class:  "btn btn-danger btn-sm",
      data:   { confirm: t(:are_you_sure_to_destroy) },
      method: :delete,
    }

    link_to t(:destroy), options, html_options, &block
  end
end