Dynamically populate dropdown with custom fields?

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Shaun
Member
I have an enquiry form that appears on every 'product page' which dynamically populates a text box with the product name, so far so good, but I'd like to add a dynamic drop-down to let the user pick a colour from the available colours.

Colours are stored in an array in a custom field, but I can't figure out how to use this custom field to populate a drop-down. Using the same code for the text field but using an array does not seem to work. Please see my code below and let me know where I am going wrong?
```
add_filter("gform_field_value_colour", "populate_list");
function populate_list($value){
     $choices[] = array(array('text' => 'Colour name', 'value' => 'colour name'));
     $choices[] = array(array('text' => 'Colour name 2', 'value' => 'colour name 2'));
return $choices;
}
```
Regards
Shaun
Posted 12 years ago on Tuesday April 3, 2012 | Permalink
Web Developer
Member
I just started using Gravity Forms and wanted to populate a drop down with a dynamic list of employees who were working at the time the form was submitted. I was running into the same problem as you when I found what needs to be done: you have to pre-populate the form.

In the following example, replace #FORM_ID# with the form's ID. Also, in the drop down, make sure you set the #CSS_CLASS# to a value in the Advanced > Css Class Name settings and edit the following code, replacing it to match what you put on your Gravity Form settings.
```
add_filter('gform_pre_render_#FORM_ID#', 'my_populate_colors');
function my_populate_colors($form) {
	foreach($form['fields'] as &$field):
		if($field['type'] != 'select' || strpos($field['cssClass'], '#CSS_NAME#') === false):
			continue;
		else:
			$choices = array();
			$choices[] = array('text' => 'Colour name', 'value' => 'colour name');
			$choices[] = array('text' => 'Colour name 2', 'value' => 'colour name 2');
			$field['choices'] = $choices;
		endif;
	endforeach;
	return $form;
}
```
Posted 12 years ago on Tuesday April 17, 2012 | Permalink
Shaun
Member

Thanks for your reply, but this is no good for me.

As I said above, the form appears on every produce page, but every product has different colours available. If I did your method, it would show options for all the colours on all the products. I need it to dynamically populate the drop-down with only the colours available for the product the person is looking at. These are stored in custom fields.

Posted 12 years ago on Wednesday April 18, 2012 | Permalink
Web Developer
Member

I was just trying to demonstrate that you need to pre-populate drop downs.

I'm using this with MySQL calls to populate the drop downs. You could use that or a switch in the 'else' area that builds the list from, say "get_the_ID()".

Posted 12 years ago on Wednesday April 18, 2012 | Permalink