_form.html.erb

<%= form_for @user_category do |f| %>

  <p>
    <%= f.label :description %>
    <%= f.text_field :description %>
  </p>
  <p>
    <%= f.radio_button :status, true, :id => 'status_true' %>
    <%= f.label 'Ativo', :for => 'status_true'  %>

    <%= f.radio_button :status, false, :id => 'status_false' %>
    <%= f.label 'Inativo', :for => 'status_false'  %>
  </p>

  <p>
    <%= f.submit 'OK' %>
  </p>

<% end %>

user_categories_controler.rb

class Admin::UserCategoriesController < ApplicationController


  def index

  end

  def new
    @user_category = Admin::UserCategory.new
  end

  def create
    render plain: params[:user_category].inspect

    return
    @user_category = Admin::UserCategory.new(user_categories_params)
    if @user_category.save
      redirect_to @user_category
    else
      render 'new'
    end
  end


  private

    def user_categories_params
      params.require(:user_category).permit(:description, :status)
    end
end