How to alter query of services module I am using service module 7.x-3.12. The index call by node resource provides provides node related data but only from node table. I can't fetch the value from custom fields of a node. So I want to alter the query in index call build by services_resource_build_index_query() function. But I can't find any way to alter the query.
You can use rules for this to add custom field or you can use "hook_services_request_postprocess_alter" to add new array with custom field. 

Using rule you can set in event "Content is viewed of type .." and in action you need to custom php that returns $node->custom_field = val;