Token based file names

In Drupal 7, there was an option to use tokens for the fields selected with the values of the first result row. That option doesn't exist in D8+

I'm going to mark this as Normal, since the functionality existed in D7

@maddentim You should use the view's ID. That's always present and always unique.

/**
 * Implements hook_views_post_execute().
 */
function MODULE_views_post_execute(ViewExecutable $view): void {
  if ($view->id() !== 'some_value') {
    return;
  }
}

I ran into this and found it surprising there isn't more support for tokens or otherwise dynamically generating pieces of the filename, like using values from an argument.

Thanks @maddentim for the approach in #7. In my case, I found I needed to use `hook_views_pre_view()` to alter the display handler 'filename' config value early enough to happen before the file is generated - see `Drupal\views_data_export\Plugin\views\display\DataExport::processBatch()`.

This worked for me in D10.2.5

use Drupal\views\ViewExecutable;


/**
 * Implements hook_views_pre_build(&$view)
 * To alter download filename
 */
function MYMODULE_views_pre_view(ViewExecutable $view, $display_id, array &$args) {


  if ($view->current_display == 'machinename_of_view_export_display')  {
	  
	if (!empty(\Drupal::request()->query->get('myqueryparam'))) {
 
		$param = \Drupal::request()->query->get('myqueryparam');

        $dateoffilecreation = date("Ymd_His");
        
	$file = 'meinfilename'.$param.'_v'.$dateoffilecreation.'.csv';
	
	// Alter the downloadable csv sheets name
	$view->display_handler->options['filename'] = $file;	
	}	  
    // $view->display_handler->options['filename'] = 'heheh.csv';
  }
}

@maxilein The $display_id is a parameter to the function. You can check that instead of $view->current_display.

You should also check $view->id(), because multiple views can have a display with the same ID.

use Drupal\views\ViewExecutable;


/**
 * Implements hook_views_pre_build(&$view)
 * To alter download filename
 */
function MYMODULE_views_pre_view(ViewExecutable $view, $display_id, array &$args) {


  if ($view->id() == 'your_view_id" && $display_id  == 'machinename_of_view_export_display')  {
	  
	if (!empty(\Drupal::request()->query->get('myqueryparam'))) {
 
		$param = \Drupal::request()->query->get('myqueryparam');

                $dateoffilecreation = date("Ymd_His");
        
	        $file = 'myfilename'.$param.'_v'.$dateoffilecreation.'.csv';
	
	        // Alter the downloadable csv sheets name
	       $view->display_handler->options['filename'] = $file;	
	}	  
  
  }
}

And for anybody looking: here is how you find view id etc.
https://stackoverflow.com/questions/72370467/how-do-i-find-the-view-name...