Magento – How to filter Mage::getResourceModel(‘catalogsearch/fulltext_collection’) by custom attribute

I want to apply some custom filter on $collection = Mage::getResourceModel('catalogsearch/fulltext_collection') search collection.

For this I have created a custom module and override Mage_CatalogSearch_Model_Layer getProductCollection function.

How to apply ->addAttributeToFilter('custom_attribute',array('in' => $array))?

When I try to apply above filter to catalogsearch collection then it returns error :

Column not found: 1054 Unknown column 'e.custom_attribute' in 'where clause', query was: SELECT FLOOR((ROUND((e.min_price) * 1, 2)) / 100000) + 1 AS `range`, COUNT(*) AS `count` FROM `catalog_product_index_price` AS `e`
 INNER JOIN `catalogsearch_result` AS `search_result` ON search_result.product_id=e.entity_id AND search_result.query_id='33'
 INNER JOIN `catalog_category_product_index` AS `cat_index` ON cat_index.product_id=e.entity_id AND cat_index.store_id='1' AND cat_index.visibility IN(3, 4) AND cat_index.category_id = '2' WHERE 1=1 AND ( final_price >= "10000" AND final_price <= "145268" ) AND (e.custom_attribute IN(190, 1247, 2862, 2863, 2864)) AND ( e.website_id = '1' ) AND ( e.customer_group_id = 0) AND (e.min_price IS NOT NULL) GROUP BY FLOOR((ROUND((e.min_price) * 1, 2)) / 100000) + 1 ORDER BY FLOOR((ROUND((e.min_price) * 1, 2)) / 100000) + 1 ASC

->addAttributeToFilter('custom_attribute',array('in' => $array)) it returns unknown column e.custom_attribute error.

How to resolve this error?