pre-populate dropdown from title field of custom post type

I have pored over previous posts on this but I get a bit lost with the hooks and query strings etc... I tried:

query_posts( 'post_type=listing' );

But it did not do anything. Any hints or outright instructions would be most welcome.

Thanks

Hi Ekajatik,

Paste this snippet in your functions.php file: http://pastie.org/1617402

Make sure to update the variables as specified in the inline comments.

Hi Norppa,

You can retrieve your field ID by viewing the source of your form and finding the ID of the field in question. It will look something like this "input_20_4". In this example, the 20 would be the form ID and the 4 would be the field ID.

As for the $post_type. You'll want to set this to the singular name of your desired post type. In my example I used reviews. You can replace this with any post type. Even standard WordPress post types such as "post" or "page".

It is possible to populate one drop down with values based on the option selected in another drop down; however, to do this on the fly would require ajax and some additional coding. You can alternately use GF's built in conditional logic to make a series of hidden drop downs that only display the correct drop down based on your primary drop down selection.