форма edit
= title 'Редактирование числа спутников'
= render partial: 'form', locals: {object: @datum}

паршал

.bi-column
  .center.mobile-padded

    .text-wrapper
      = simple_form_for @datum, url: admin_other_datum_path(@datum), method: :put do |f|
        = f.input :title
        = f.input :number

        - if can? :other_data_assign_roles, @user
          = f.input :roles, as: :check_boxes, collection: t('enum.permissions').stringify_keys.invert


        .buttons.mobile-padded
          = button_tag f.submit "Изменить", class: 'button'
      = params

Контроллер

class Admin::OtherDataController < Admin::AdminController

  authorize_resource
  # include Admin::CUDProcessing
  # self.object_class = OtherDatum

  def index
    @other_data_all = OtherDatum.all
  end

  def edit
    @datum = OtherDatum.friendly.find_or_initialize_by(slug: params[:id]) do |data|
      data.title = I18n.t(params[:id], scope: 'activerecord.attributes.other_datum.table', default: params[:id])
      data.number = 0
      data.slug = params[:id]
    end
    byebug
  end

  def update
    @datum = OtherDatum.friendly.find_or_initialize_by(slug: params[:id])
    # @datum = OtherDatum.friendly.find_or_initialize_by(slug: params[:id]) do |data|
    #   data.title = params[:other_datum][:title]
    #   data.number = params[:other_datum][:number]
    #   data.roles = params[:other_datum][:roles]
    #   data.slug = params[:id]
    # end
    byebug
    # if @datum.update(other_datum_params.merge(slug: params[:id]))
      if @datum.update(other_datum_params)
      redirect_to({:action => :index}, {:notice => 'Data updated'})
    else
      render :edit, id: params[:id]
    end
  end

  def other_datum_params
    params.require(:other_datum).permit(:title, :number, :roles, :slug)
  end

end

Модель

class OtherDatum < ActiveRecord::Base
  include FriendlyId
  strip_attributes
  friendly_id :title, use: :slugged

  validates :title, :number, presence: true

end

Таблица

  create_table "other_data", force: :cascade do |t|
    t.string "title"
    t.integer "number"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.string "slug"
    t.string "roles", default: [], null: false, array: true
    t.index ["slug"], name: "index_other_data_on_slug", unique: true
  end