BuddyPress.org

Ok,here is the solution.

This will sllow user to search for the blog posts on the main site only.

I have used two hooks to accomplish the purpose.

put this code in either bp-custom.php or in functions.php of your current theme. No core modification is required.

//filter the allowed search type

add_filter("bp_search_form_type_select","bpdev_allowed_search_type");

function bpdev_allowed_search_type($selecttion_box_old){

//ignore the selection box

$selection_box = '<select name="search-which" id="search-which" style="width: auto">';



if ( function_exists( 'xprofile_install' ) ) {

$selection_box .= '<option value="members">' . __( 'Members', 'buddypress' ) . '</option>';

}



if ( function_exists( 'groups_install' ) ) {

$selection_box .= '<option value="groups">' . __( 'Groups', 'buddypress' ) . '</option>';

}



if ( function_exists( 'bp_forums_setup' ) && !(int) get_site_option( 'bp-disable-forum-directory' ) ) {

$selection_box .= '<option value="forums">' . __( 'Forums', 'buddypress' ) . '</option>';

}

//here we modify the thing to a new type posts

$selection_box .= '<option value="posts">' . __( 'Blog', 'buddypress' ) . '</option>';



$selection_box .= '</select>';

return $selection_box;

}

//let us filter the search action urls

add_filter("bp_core_search_site","bpdev_filter_search_url");

function bpdev_filter_search_url($search_url){

//if user is searching for main site content, modify url else return url

$search_terms = $_POST['search-terms'];

$search_which = $_POST['search-which'];

if($search_which="posts")

$search_url=site_url( "?s=". urlencode($search_terms) );

return $search_url;

}