Can't add to cart grouped products - php

Question

I've tried on my wordpress site to group multiple products and I have no idea why but I can't add products on cart.. I've tried to complete all the input for quantity, but nothing.. Any idea? On single product works..
Here is my grouped.php
<?php
/**
* Grouped product add to cart
*
* #author WooThemes
* #package WooCommerce/Templates
* #version 2.1.7
*/
if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
global $product, $post;
$parent_product_post = $post;
do_action( 'woocommerce_before_add_to_cart_form' ); ?>
<form class="cart" method="post" enctype='multipart/form-data'>
<div class="group_table">
<?php
foreach ( $grouped_products as $product_id ) :
$product = wc_get_product( $product_id );
$post = $product->post;
setup_postdata( $post );
?>
<div class="group-row">
<div class="quantity-row">
<?php if ( $product->is_sold_individually() || ! $product->is_purchasable() ) : ?>
<?php woocommerce_template_loop_add_to_cart(); ?>
<?php else : ?>
<?php
$quantites_required = true;
woocommerce_quantity_input( array( 'input_name' => 'quantity[' . $product_id . ']', 'input_value' => '0' ) );
?>
<?php endif; ?>
</div>
<div class="label">
<label>
<?php
if($product->is_visible()) {
echo '' . get_the_title() . '';
} else {
echo get_the_title();
}
?>
</label>
</div>
<?php do_action ( 'woocommerce_grouped_product_list_before_price', $product ); ?>
<div class="price">
<?php
echo ''.$product->get_price_html();
if ( $availability = $product->get_availability() ) {
$availability_html = empty( $availability['availability'] ) ? '' : '<p class="stock ' . esc_attr( $availability['class'] ) . '">' . esc_html( $availability['availability'] ) . '</p>';
echo apply_filters( 'woocommerce_stock_html', $availability_html, $availability['availability'], $product );
}
?>
</div>
</div>
<?php
endforeach;
// Reset to parent grouped product
$post = $parent_product_post;
$product = wc_get_product( $parent_product_post->ID );
setup_postdata( $parent_product_post );
?>
</div>
<?php if($product) {?>
<input type="hidden" name="add-to-cart" value="<?php echo esc_attr( $product->id ); ?>" />
<?php if ( $quantites_required ) : ?>
<?php do_action( 'woocommerce_before_add_to_cart_button' ); ?>
<button type="submit" class="single_add_to_cart_button button alt"><?php echo ''.$product->single_add_to_cart_text(); ?></button>
<?php do_action( 'woocommerce_after_add_to_cart_button' ); ?>
<?php endif; ?>
<?php } else { ?>
<?php
$productid = intval( $_POST['data'] );
$product = get_product( $productid );
?>
<input type="hidden" name="add-to-cart" value="<?php echo esc_attr( $product->id ); ?>" />
<?php if ( $quantites_required ) : ?>
<?php do_action( 'woocommerce_before_add_to_cart_button' ); ?>
<button type="submit" class="single_add_to_cart_button button alt"><?php echo ''.$product->single_add_to_cart_text(); ?></button>
<?php do_action( 'woocommerce_after_add_to_cart_button' ); ?>
<?php endif; ?>
<?php }?>
</form>
<?php do_action( 'woocommerce_after_add_to_cart_form' ); ?>
UPDATE
Here is the problem fix..
woocommerce_quantity_input( array( 'input_name' => 'quantity[' . $product_id->get_id() . ']', 'input_value' => '0' ) );
The problem was at quantity.. before on quantity was all object of $product_id now is only the id of product, that was the problem..

Answer 1

Here is the problem fix..
woocommerce_quantity_input( array( 'input_name' => 'quantity[' . $product_id->get_id() . ']', 'input_value' => '0' ) );
The problem was at quantity.. before on quantity was all object of $product_id now is only the id of product, that was the problem..