How to modify archive query with pre_get_posts to append CPTs?

You seems to assume that it would grab archive for first of multiple post types. But why? Order in this case does not indicate any kind of priority.

WP seems to consider that logical as well. If you take a look at get_archive_template() the individual template will only be considered if there is only one post type in query.

Multiple post types in query will cause archive.php to load, as you are observing.

If you want to load more specific template, you would need to override that via filters as well, for example with archive_template one (dynamic one in get_query_template()).

Related Posts:

  1. $query->set in pre_get_posts is unintentionally affecting the backend
  2. Add Custom Post Type to Current Query
  3. How to show more posts on an archive page?
  4. Custom post type with tags
  5. I am trying to hide a custom post type category to logged in users with Pre_Get_Posts
  6. Custom post type posts don’t show in archive widget
  7. Query multiple taxonomies with pre get posts
  8. Custom Post Type setup
  9. pre_get_posts works in post type archive but not in single post
  10. Pagination not working with custom loop
  11. Custom Post Type Archives by Year & Month?
  12. Get custom post type slug for an archive page
  13. Prevent pre_get_posts filter on specific post type
  14. get attachments for all posts of particular post type
  15. Custom Post Type Archives by Date with Custom Permalink
  16. Custom Queries: Joining On Meta Values From Two Custom Post Types
  17. is_singular won’t call my functions?
  18. Querying Posts by Taxonomy From Alternate Network Site
  19. Change plugin’s has_archive = true to false?
  20. show posts only on homepage but using custom post type and taxonomy for query posts via url
  21. Include different loop templates in search query
  22. Slug for standard post post_type
  23. Using pre_get_posts to Filter Posts
  24. WordPress custom post type archive with description
  25. CPT: archive-cpt.php VS custom page template
  26. Get post type from taxonomy or category page
  27. Category page only displaying the posts from a custom type
  28. custom taxonomy archive by year
  29. When ‘is_post_type_archive()’ return true?
  30. Is it possible to create a shortcode that will query a post based on taxonomies?
  31. Selecting New & Edit Page for Custom Post Types
  32. Using pre_get_posts to filter one loop in a multiloop archive
  33. Change archive page template using pre_get_post
  34. CPT Archive with core Category
  35. Custom post type redirected to homepage – how to debug
  36. get the custom post type title/name
  37. Get archive post type name
  38. Filtering WP_Query
  39. Custom post type – get_day_link()
  40. Meta query for custom post type ignored in main query
  41. Querying Two Custom Post Types with OR Not Working
  42. How do I move/order posts with a tag to the end?
  43. How to sort custom columns for custom post type without meta query and pre_get_posts?
  44. Why is my site using index.php instead of archive?
  45. Custom post type archive page blank
  46. How do I check if the user is on a taxonomy term parent, child or grandchild page?
  47. Custom post type / taxonomy rewrite archive page 2 gives 404
  48. how to remove pages loading with the archive templates
  49. show all custom posts types in home page
  50. Make (custom) post type accessible only by custom query
  51. Archiving custom post content?
  52. How to rewrite custom taxonomy term archive to use THE SAME SLUG/front as CPT
  53. Custom Query: If One Post Object Field Value Is The Same As Another
  54. How to query for posts (hierarchical custom post type) that have children but are NOT top level?
  55. CPT Archive pre_get_posts not working?
  56. Get the link of the first post of a custom taxonomy in a custom taxonomy list
  57. How can I relate custom post types?
  58. Hide text if query has no posts
  59. How do I get the index for a custom post?
  60. Create query for both custom post type and category
  61. Filtering custom posts by custom fields (ACF) [closed]
  62. Custom taxonomy query showing more than 4 posts
  63. Display CPT index page as front/home page
  64. Event Archive by Month
  65. How to divide Subcategories into pages of parent category wordpress
  66. Display all Categories except ones with a specific parent
  67. How to achieve a multi-taxomony layout with posts?
  68. Archive per year of a custom post getting the wrong post
  69. WP Query: If field X is empty, show posts based on field Y
  70. Shortcode with loop stacks output
  71. Displaying all posts by category and showing content on click
  72. Custom post type order by post_title
  73. Tell wordpress to show a single page instead of an archive page
  74. Custom post type categories giving 404
  75. How can i remove post type archive URL?
  76. Custom post type URL structure with site.com/custom_taxonomy_slug/post_name
  77. Set different posts_per_page for custom post type/taxonomy
  78. Meta query broken since 4.7.4 Update
  79. Custom taxonomy archive slug overwrites static page
  80. Custom Post Type shows pagination (w/404) or posts_per_page query, but not both
  81. Help ordering custom query by Title, Ascending
  82. How to add parameters for custom post type
  83. Rewriting archive page slug to be different than custom post type slug
  84. Is it possible to add query parameters on the archive page?
  85. Site loads very slow for archive custom post type page
  86. Setting a custom $query->query_vars[‘meta_key’] breaks the WordPress menu
  87. Query Only Show Text on Posts With Certain Taxonomy Tag
  88. pre_get_posts action doesn’t work
  89. Query Posts From Multiple Post Types
  90. Pagination not working with custom loop
  91. how to limit query_post to first page?
  92. Pagination not working with custom loop
  93. Retrieve post data via WPDB class
  94. Listing custom post type items from a couple of custom taxonomies
  95. Pagination not working with custom loop
  96. Generate daily archive whenever any post type is added
  97. Show custom posts with a specific “custom TAXONOMY slug” on startpage
  98. Posts 2 Posts: query connected — orderby problem
  99. Load posts via AJAX without draft status
  100. WordPress CPT archive page display sticky post first and then display the rest of the posts in same Query
tech