If images / content are bounded by field collection module, you can try approach below to index to solr

enjoy

//Index product images

$field_collection_items = field_get_items(‘node’, $node, ‘field_image_set’);

$field_collection_item_ids = array();

$i = 0;

foreach ($field_collection_items as $field_collection_item){

$field_collection_item_ids[$i] = $field_collection_item['value'];

$i++;

}

$field_collection_item_fields = entity_load(‘field_collection_item’, $field_collection_item_ids);

$image_fields = array();

$i = 0;

foreach ($field_collection_item_fields as $field_collection_item_field){

$image_fields[$i] = field_get_items(‘field_collection_item’, $field_collection_item_field, ‘field_image’);

$i++;

}

$i = 0;

foreach ($image_fields as $image_field){

foreach ($image_field as $image)

$path = file_create_url($image['uri']);

$document->setMultiValue(‘sm_field_image_’.$i++, $path); //Set multiple field_image values

}

function scp_solr_search_apachesolr_update_index(&$document, $node){
$document->setMultiValue(‘sm_field_xxxx’,
$node->field_xxxx['und'][0]['value']);

2. Add modify query

function scp_solr_search_apachesolr_modify_query(&$query, $caller){
$query->params['fl'] .= ‘,sm_field_xxxx’;

3. update solr and done ~!

* scp_solr_search is my module name Enjoy
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