How to display elements from several infoblocks in catalog.top?

Question

1C-Bitrix

Hello! I can’t display products from several infoblocks in catalog.top, I tried this:
"IBLOCK_ID" => array(86, 87, 88),
and this

"IBLOCK_ID" => array(   
            0 => "86",
            1 => "87",
            2 => "88",
        ),

Answer 1

The catalog.top component has a non-multiple IBLOCK_ID property,
this is from the component parameters

IBLOCK_ID' => array(
      'PARENT' => 'BASE',
      'NAME' => GetMessage('IBLOCK_IBLOCK'),
      'TYPE' => 'LIST',
      'ADDITIONAL_VALUES' => 'Y',
      'VALUES' => $arIBlock,
      'REFRESH' => 'Y',
    ),

to be multiple, you need the MULTIPLE field with the value Y.
You can create a new component inherited from CatalogTopComponent
in the .parameters.php file specify the multiple for selecting IB.
You may have to play with the override of the checkIblock method, adding your own check logic there

Answer 2

Display several components (one infoblock in each).