Programmatically change post templates? [duplicate]

Question

Possible Duplicate:
Wordpress - Programmatically change post templates?

I need to change the template on several hundred pages on my site. Does anyone know if there is a command to do it programmatically? See the following code snippet; I'd like to replace my comment inside the loop with a function that will change the template of the current page:

query = new WP_Query($args);
while ( $query->have_posts() ) : $the_query->the_post();
  if ( has_tag('tag-slug') )
  {
     /* CHANGE TEMPLATE OF $post */
  }
endwhile;
wp_reset_postdata();

Answer 1

Try this:

while ( $query->have_posts() ) : $query->the_post();
  if ( has_tag('tag-slug') )
  {
     get_template_part( 'content', 'tag-slug' );
  }
  else
  {
     get_template_part( 'content' );
  }

endwhile;

You would then need to create content.php and content-tag-slug.php with the appropriate content.

You could also look into setting up Post Formats. A bit more work up front, but a nicer experience down the road.