title: WooCommerce Variable Product notice Issue - please choose product options
body: <p>I'm  building an e-commerce site. I'm having some trouble with WooCommerce <strong>Variable Product</strong>.</p>
  
  <p>The "Add to Cart" button works fine with simple products, but does not work with variable products. It gives a <code>"Please choose product options…"</code> notice.</p>
  
  <p>I looked everywhere and tried several suggestions online, none of them work. So I looked into WooCommerce source file: <strong><code>class-wc-form-handler.php</code></strong>.</p>
  
  <p>In the function <strong><code>add_to_cart_handler_variable</code></strong>:</p>
  
  <pre><code>function add_to_cart_handler_variable( $product_id ) {
      $adding_to_cart     = wc_get_product( $product_id );
      $variation_id       = empty( $_REQUEST['variation_id'] ) ? '' : absint( $_REQUEST['variation_id'] );
      $quantity           = empty( $_REQUEST['quantity'] ) ? 1 : wc_stock_amount( $_REQUEST['quantity'] );
      $missing_attributes = array();
      $variations         = array();
      $attributes         = $adding_to_cart-&gt;get_attributes();
      $variation          = wc_get_product( $variation_id );
  ...
  if ( $missing_attributes ) {
          wc_add_notice( sprintf( _n( '%s is a required field', '%s are required fields', sizeof( $missing_attributes ), 'woocommerce' ), wc_format_list_of_items( $missing_attributes ) ), 'error' );
      } elseif ( empty( $variation_id ) ) {
          wc_add_notice( __( 'Please choose product options&amp;hellip;', 'woocommerce' ), 'error' );
      } else {
          // Add to cart validation
          $passed_validation  = apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity, $variation_id, $variations );
  
          if ( $passed_validation &amp;&amp; WC()-&gt;cart-&gt;add_to_cart( $product_id, $quantity, $variation_id, $variations ) !== false ) {
              wc_add_to_cart_message( $product_id );
              return true;
          }
      }
      return false;
  }
  </code></pre>
  
  <p>The error is caught in the elseif clause. <br>
  So I tried to echo out <code>$variation_id</code>, <code>$variations</code>, and <code>$variation</code>. None of them has anything in it because when I echo <code>$variation_id</code>: it doesn't output anything.</p>
  
  <p>Any suggestions?</p>