ruby on rails getting back end id value from selected autocomplete field

Question

hi all,

regarding ruby on rails.

In the autocomplete field, when the user selects tagname, i need to get the back end tag_id. the way we do in selection box, where it is possible to get the value as an id in the autocomplete field plugin.

and when the user can select incremental selection separated by , . i need to get the selected ids.

ex : consider for tag1 id is ->1 tag2 id is ->2

when the user selects both the tags as tag1,tag2 i need back end value ad 1,2 .

whether this can possible, please send me the link or code where i can find the solution.

thanks and regards, Mahesh