wordpress - When I add custom post type permalink rewrite, my regular post permalinks stop working. Can't get both to work at the same time -

really struggling one, appreciated. site has both regular post posts, , custom post type called "articles."

i'm trying work regular posts use /%category%/postname%/ permalink structure, (which have set in settings). working fine, until add custom rewrite article post type. i'd articles follow /%issue%/%postname%/ structure. can working great following:

add_filter( 'post_type_link', 'wpa_show_permalinks', 1, 2 );  function wpa_show_permalinks( $post_link, $id = 0 ){     $post = get_post($id);     if ( is_object( $post ) && $post->post_type == 'article' ){         $terms = wp_get_object_terms( $post->id, 'issue_tax' );         if( $terms ){             return str_replace( '%issue%' , $terms[0]->slug , $post_link );         }     }     return $post_link; } 

where post type registered this:

function article_post_type() {  $labels = array(     'name'                => _x( 'magazine articles', 'post type general name', 'text_domain' ),     'singular_name'       => _x( 'magazine article', 'post type singular name', 'text_domain' ),     'menu_name'           => __( 'magazine articles', 'text_domain' ),     'name_admin_bar'      => __( 'magazine articles', 'text_domain' ),     'parent_item_colon'   => __( 'parent article:', 'text_domain' ),     'all_items'           => __( 'all articles', 'text_domain' ),     'add_new_item'        => __( 'add new article', 'text_domain' ),     'add_new'             => __( 'add new', 'text_domain' ),     'new_item'            => __( 'new article', 'text_domain' ),     'edit_item'           => __( 'edit article', 'text_domain' ),     'update_item'         => __( 'update article', 'text_domain' ),     'view_item'           => __( 'view article', 'text_domain' ),     'search_items'        => __( 'search article', 'text_domain' ),     'not_found'           => __( 'not found', 'text_domain' ),     'not_found_in_trash'  => __( 'not found in trash', 'text_domain' ), ); $rewrite = array(     'slug'                => '%issue%',     'with_front'          => false,     'pages'               => true,     'feeds'               => true, ); $args = array(     'label'               => __( 'article', 'text_domain' ),     'description'         => __( 'magazine articles , features', 'text_domain' ),     'labels'              => $labels,     'supports'            => array( 'title', 'editor', 'excerpt', 'author', 'thumbnail', 'comments', 'trackbacks', 'revisions', 'custom-fields', 'page-attributes', ),     'taxonomies'          => array( 'issue_tax', 'category', 'featured_media', 'tag' ),     'hierarchical'        => false,     'public'              => true,     'show_ui'             => true,     'show_in_menu'        => true,     'menu_position'       => 5,     'menu_icon'           => 'dashicons-welcome-write-blog',     'show_in_admin_bar'   => true,     'show_in_nav_menus'   => true,     'can_export'          => true,     'has_archive'         => true,     'exclude_from_search' => false,     'publicly_queryable'  => true,     'rewrite'             => $rewrite,     'capability_type'     => 'page', ); register_post_type( 'article', $args );  }   add_action( 'init', 'article_post_type', 0 ); 

i add that, reset permalink settings, , article permalinks start working indended - - working, regular posts start displaying 404.

why unable both work @ same time? missing piece somewhere?

thanks advice!

-erin

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just follow question - perhaps thing i'm struggling why post_type_filter function affecting more article post type have specified?

thanks, erin

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ok, 1 more super strange thing. works if pass query parameter @ end of custom post links, works: http://www.mysitename.com/spring-2015/test-article-here/?post_type=article gives me 404 http://www.mysitename.com/spring-2015/test-article-here/

why be? i'm sorry many questions, trying bottom of this..!

thanks again, erin