automatically populate a dropdown with post titles?

I would be interested in this as well. I'm building a simple webshop in which every post is a product. The form to order the product has hidden fields prepopulated with the product title (post title) and price (custom field).

I'd like to enable people to add one or two extra products to the form. A dropdown or multiple choice field with post titles would be a great solution.

HI Carl, great! now I know it can be done I'd love to see a code snippet. Any clue on when you could put something together?

Cool, this works.. Thanks Carl!

I used the code from the example.
But it seems that the "isSelected" Setting isn't used from gravityForms.

Thanks for this great code snippet. It got me thinking about adding a dropdown with get_the_terms(). Here is how I edited Alex's code in order to get a dropdown of shoesizes (custom taxonomy) for the current post id (I embed the same order form in every product post, but shoesizes vary):

//Adds a filter to form id 7. Replace 7 with your actual form id
add_filter( 'gform_pre_render_7', 'populate_dropdown' );
function populate_dropdown($form){

    //Reading terms for current post;
    global $post;
    $terms = get_the_terms($post->ID, 'size');

    //Creating drop down item array.
    $items = array();

    //Adding initial blank value.
    $items[] = array("text" => "", "value" => "");

    //Adding term names to the items array
    foreach($terms as $term){
        $is_selected = $term->name == "testing" ? true : false;
        $items[] = array("value" => $term->name, "text" => $term->name, "isSelected"=> $is_selected);
    }

    //Adding items to field id 1. Replace 1 with your actual field id. You can get the field id by looking at the input name in the markup.
    foreach($form["fields"] as &$field)
        if($field["id"] == 1){
            $field["type"] = "select";
            $field["choices"] = $items;
        }

    return $form;
}

Replace size in get_the_terms($post->ID, 'size'); with whatever taxonomy you want your dropdown to be pre-populated.

I'd be honored to write a tutorial about this. It might be interesting to cover the whole proces of building a simple WordPress shoe store using Gravity Forms, custom post types and custom taxonomies.

I'm quite new to Gravity Forms so I have a very basic question...where do I put the above code snippet(s)? This post contains exactly what I am trying to do, myself.

I don't see any area in Gravity Forms to create a 'text field' in the admin panel. I see Single Line Text and Paragraph text, but there's no clear area to paste this code.

I've looked everywhere and found no documentation on how to use the more advanced functions of GF, such as dynamic field population and the above desired effect. Thanks in advance, guys!

@Illuminated, place the code snippet in your functions.php and adjust the form ID, the 'text field' is the paragraph text in the GF backend

Also tried this, no luck...

//Adds a filter to form id 14. Replace 14 with your actual form id
add_filter("gform_pre_render_1", populate_dropdown);
function populate_dropdown($form){

    //Reading posts for "Business" category;
	global $post;
        $posts = get_posts("post_type=calendar&showposts=99&orderby=title&order=ASC");
	$date = get_post_meta($post->ID, 'Dates', false);

    //Creating drop down item array.
    $items = array();

    //Adding post titles to the items array
    foreach($posts as $post)
        $items[] = array("value" => $post->date, "text" => $post->date);

    //Adding items to field id 8. Replace 8 with your actual field id. You can get the field id by looking at the input name in the markup.
    foreach($form["fields"] as &$field)
        if($field["id"] == 27){
            $field["type"] = "checkbox";
            $field["choices"] = $items;
        }

    return $form;
}

And when I think about it, I'm also looking to have it return two fields: the post title and the custom field of 'date'. Hopefully someone here has done something like this! :)

any ideas on this? Thanks.

Hi Jean Paul,

You can update the contents of any Gravity Form field using the gform_pre_render filter. Here is some code that accomplishes what you are after (http://pastie.org/1059179) and here is a sample of what it will generally look like once implemented (http://grab.by/5zNw)

Quick Breakdown:

add_filter('gform_pre_render_7', 'customize_html_blocks');

Here is where we assign the customize_html_blocks function to be run by the gform_pre_render filter. The number at the end is the ID of the form I used to test this code. You should change this to the form id you wish to implement this code for.

$posts = get_posts('numberposts=5');
    foreach($posts as $post) {
        $content .= '<li><a href="' . get_permalink($post->ID) . '" target="_blank">' . $post->post_title . '</a></li>';
    }
$content = '<h3>Latest News</h3><ul>' . $content . '</ul>';

Next we get the posts we want to display and then loop through each returned post getting the post title and any other information we want to display about the post. You'll notice that I also wrapped my post title with a link to the post and a list item so everything will look nice and orderly when we display this on the front-end. The last line gives the whole section a title (Latest News) and wraps all of our post title list items in an unordered list.

$form['fields']['0']['content'] = $content;
    return $form;

This last bit updates the form object that is originally passed to this filter function with the content we just created. You'll need to figure out which field you're updating by viewing the source and looking at the field id. In my case it was "0". Then all there is left to do is return the updated form object. And done! :)

My pleasure. Let me know if this works for you. :)

Hey Jean, the example I provided assumes you are using an HTML block field. Sorry, I probably should have specified that. I think that'll do the trick for you. Let me know.

If you don't mind, could I get FTP access to this WP install? I would probably have better luck troubleshooting this if I can see the backend. You can email me at david@ounceoftalent.com.

Alright, fixed. Here is the update snippet: http://pastie.org/1060312

The issue was a bad assumption on my part.

$form['fields']['0']['content'] = $content;

This line assumes that the index of the field in the form object is the same as the field id. This is not a good assumption to make; specifically in cases where forms have been updated several times. I've replaced that line with this:

for($i = 0; $i < count($form['fields']); $i++) {
    	if($form['fields'][$i]['id'] == 42) {
    		$form['fields'][$i]['content'] = $content;
    	}
}

What we are doing instead is looping through each field in the form object and checking if the field id of that field is the field id we are looking for (in this case "42"). If so, THEN we replace the old content with our updated content.

I've implemented this on your server. Let me know if you run into any issues. :)

Hi!

Is it possible to pre select a value in the dropdown based on what page the user comes from?

Hi!

I tried that but its not working when im using the code that Carl Hancock wrote on the top

//Adds a filter to form id 14. Replace 14 with your actual form id
add_filter("gform_pre_render_14", populate_dropdown);
function populate_dropdown($form){

    //Reading posts for "Business" category;
    $posts = get_posts("category=Business");

    //Creating drop down item array.
    $items = array();

    //Adding initial blank value.
    $items[] = array("text" => "", "value" => "");

    //Adding post titles to the items array
    foreach($posts as $post)
        $items[] = array("value" => $post->post_title, "text" => $post->post_title);

    //Adding items to field id 8. Replace 8 with your actual field id. You can get the field id by looking at the input name in the markup.
    foreach($form["fields"] as &$field)
        if($field["id"] == 8){
            $field["type"] = "select";
            $field["choices"] = $items;
        }

    return $form;
}

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