Get_template_part seems to be ignoring my template

Question

I am developing a website that requires specific pages to have certain elements change color in addition to a full-width calendar page. I figured that using page templates and changing what get_template_part looks for would be the simplest approach, but I've run into unexpected trouble. The page template loads fine, but the specific content template appears to get ignored, with WordPress instead loading the general template. I'm using a child theme derived from Twenty Fifteen, but this shouldn't be a problem, since the customized content template loads just fine.

get_template_part( 'content', 'page', 'kahvilaravintola' );

It should be loading content-page-kahvilaravintola.php, located right in the child theme's folder, but instead loads content-page.php, located in the same folder. I can't seem to figure out what is wrong.

Answer 1

Taken from the Codex and Dev Hubs:

 <?php get_template_part( $slug ); ?> 

 <?php get_template_part( $slug, $name ); ?>

get_template_part only takes 2 parameters, not 3. If you look in your error log you should be seeing warnings and notices that you passed a third parameter to a function that only takes 2. I would expect your call to load the file content-page.php then content.php. Nothing is done with kahvilaravintola, as it's an unexpected and unused third parameter