Gravity Forms：如何从订单条目和购物车隐藏中间计算字段

It’s super common to hit this snag when using intermediate calculation fields in Gravity Forms—they’re essential for pricing logic but shouldn’t clog up cart or order entries. The gform_pre_submission hook works great for tweaking form data before submission, but since the WooCommerce Gravity Forms Addon handles cart/order integration separately, that hook might not catch all instances where those fields slip through. Here are targeted fixes to resolve this:

1. Strip Intermediate Fields Before They Reach the Cart #

The gform_woo_add_cart_item_data filter is built specifically for modifying data sent to WooCommerce when adding a product with a Gravity Form. Use this to remove your hidden calculation fields before they even get added to the cart:

add_filter( 'gform_woo_add_cart_item_data', 'remove_intermediate_fields_from_cart', 10, 3 );
function remove_intermediate_fields_from_cart( $cart_item_data, $form, $entry ) {
    // Replace with your actual intermediate field IDs (add more to the array if needed)
    $hidden_field_ids = array( 5, 7 );
    
    foreach ( $hidden_field_ids as $field_id ) {
        $field_key = 'gf_' . $form['id'] . '_' . $field_id;
        if ( isset( $cart_item_data[ $field_key ] ) ) {
            unset( $cart_item_data[ $field_key ] );
        }
    }
    
    return $cart_item_data;
}

2. Hide Fields from Cart/Checkout UI #

If the fields are still showing up in the cart or checkout display (even if they’re not stored), use the woocommerce_get_item_data filter to exclude them from being rendered:

add_filter( 'woocommerce_get_item_data', 'hide_intermediate_fields_in_cart_display', 10, 2 );
function hide_intermediate_fields_in_cart_display( $item_data, $cart_item ) {
    // Replace with the exact labels of your intermediate calculation fields
    $hidden_labels = array( 'Subtotal Calculation', 'Tax Estimate' );
    
    foreach ( $item_data as $key => $data ) {
        if ( in_array( $data['name'], $hidden_labels ) ) {
            unset( $item_data[ $key ] );
        }
    }
    
    return $item_data;
}

3. Clean Up Entry Data (If Needed) #

If those intermediate fields are still lingering in Gravity Forms entries, complement your existing gform_pre_submission hook with gform_entry_field_value to ensure they’re not stored or displayed:

add_filter( 'gform_entry_field_value', 'remove_intermediate_fields_from_entry', 10, 4 );
function remove_intermediate_fields_from_entry( $value, $field, $entry, $form ) {
    // Replace with your hidden field IDs
    $hidden_field_ids = array( 5, 7 );
    
    if ( in_array( $field->id, $hidden_field_ids ) ) {
        return ''; // Return null instead if you want to completely remove the field from entries
    }
    
    return $value;
}

Quick Tips: #

• To find your field IDs: Edit your Gravity Form, hover over the field, and check the bottom-left corner of the screen for the ID number.
• Make sure you’re running the latest version of the WooCommerce Gravity Forms Addon—compatibility bugs often get fixed in updates.
• Test each filter one at a time to pinpoint which resolves your specific issue, since the root cause can vary based on your form and addon setup.

内容的提问来源于stack exchange，提问作者Steve Weigold