Using choice fields to filter preset date ranges

Trevor

#270878

With a date field, there are only two ways I can think to do this.

1. Have an additional custom field in the posts where one of those 3 labels is the choice.
2. Use code. How this would work is:

# Set the form UI field to a number range field, like this (in this case I chose a radio field, but a dropdown would also work, I think):

https://www.screencast.com/t/rpY6G9KLnX

Ignore my field name! Use what you have as a field name.

Then add code like this to your child theme functions.php file (change the field name, form ID number and dates to work for you):

function update_field_options($input_object, $sfid){
	
	// ensure we are only filtering the correct field name in the correct form - in this case the field we want to filter has the name '_sfm_first_date_to', based on the field name 'first_date_to'
	if( $input_object['name'] == '_sfm_first_date_to' && $sfid == 42 ) {
		
		// if we want to filter the options generated, we need to make sure the options variable actually exists before proceeding (its only available to certain field types)
		if( ! isset( $input_object['options'] ) ) {
			return $input_object;
		}
		//udpate this field before rendering
		//all the options are stored in $input_object['options'] as an array
		$new_options = array();

		//create a new "default" option
		$new_option = new StdClass();
		$new_option->value = "";
		$new_option->label = "All Ages";
		array_push($new_options, $new_option);	
	
		//create a new range option we want to add
		$new_option = new StdClass();
		$new_option->value = "19900101+29991231"; //this is the value that goes in the URL, which affects the query
		$new_option->label = "Latest"; //the label can be anything
		array_push($new_options, $new_option);//create a new range option we want to add

		$new_option = new StdClass();
		$new_option->value = "0+19561231"; //this is the value that goes in the URL, which affects the query
		$new_option->label = "Golden Age"; //the label can be anything
		array_push($new_options, $new_option);

		$new_option = new StdClass();
		$new_option->value = "19570101+19891231"; //this is the value that goes in the URL, which affects the query
		$new_option->label = "Silver Age"; //the label can be anything
		array_push($new_options, $new_option);

		//now replace the options with our own custom options:
		$input_object['options'] = $new_options;
	}
	return $input_object;
}

add_filter('sf_input_object_pre', 'update_field_options', 10, 2);

You can see what it looks like on this demo I made (it is not functional as the data does not match!!):

https://sandfdev.cdnwebservices.net/shop/

I hope that makes sense!

It assumes that the date data is correctly stored in ACF/SQL date format(YYYYMMDD).

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