Display latest x posts from all categories in Custom Post Type/Taxonomy

The category parameters does not work with custom taxonomies. You need to use a tax_query instead.

In your current code, replace (which is in any case also wrongly used, category_name takes the slug, not name)

'category_name' => $category->name

with

'post_type' => 'case-studies',
'tax_query' => array(
    array(
        'taxonomy' => $tax
        'terms' => $category->term_id,
        'include_children' => false
    )
),

Related Posts:

  1. Get all taxonomies for all post types
  2. Is it possible to use array_walk() to append terms to an array of posts?
  3. get_terms by custom post type
  4. Get Posts by Custom Post Type ,Taxonomy, and Term
  5. How to limit the number of terms (terms acts like categories)
  6. How do I list custom taxonomy terms without the links?
  7. wp_insert_term doesn’t work with custom post type’s taxonomy
  8. show tags of custom post type ONLY
  9. Count posts that have specific taxonomy term attached
  10. Retrieve single term slug
  11. display multiple term post from taxonomy in a single page
  12. How to get a list of term names of the custom post type im currently on in single.php
  13. Adding a term name from a custom taxonomy assigned to a post link displayed by a wp_query loop based on another taxonomy
  14. How to get only one category of custom post type?
  15. Get list of terms of current taxonomy archive for another taxonomy
  16. List all custom post type posts from a given category?
  17. Category page only displaying the posts from a custom type
  18. Order WordPress Custom Taxonomy Pages & Pagination Not Working
  19. How to filter out post type meta?
  20. How to output wordpress custom tags separated by comma?
  21. Have a Custom Post Type index page display taxonomy items instead of posts
  22. Get Post Primary Category
  23. How to check the terms in single custom post type template
  24. Custom query to filter posts that have current post as a taxonomy [closed]
  25. Why are taxonomy terms not saving when using custom meta boxes with radio button taxonomy selectors?
  26. Custom post taxonomies as tax_query terms?
  27. Issue on Creating Custom Tax Term Dynamically From Another CPT Meta-box On Publish
  28. How do I display the taxonomy for a custom post type in an array
  29. Foreach inside shortcode not working as planned
  30. Conditional statement for if archive page has posts which contain certain taxonomies/categories/tags, show those terms
  31. Different Category system needed for the Custom Post Type
  32. Output terms for custom post types
  33. I need to add a filter to prepend the term ‘National – ‘ to the post title if the post is tagged to multiple states
  34. Pagination hitting 404 page on /page/4
  35. custom hierarchical taxonomy and custom post type list contains surplus posts
  36. get_terms() returns Trying to get property of non-object error for custom taxonomy
  37. Query custom post types & Taxonomies and list them in a table on a page
  38. meta query not retrieving posts
  39. Commas not displaying in implode
  40. Custom Taxonomy Terms in Menu lead to which page?
  41. Get posts by category name
  42. Custom Post Type Taxonomy Term Order by Title
  43. Using page title as a link to term archive
  44. How to get post count of specific taxonomy that have store name & category
  45. How to automatically create a terms based on each post of a post type
  46. Get List of Terms based on a given term (different taxonomy)
  47. Page that lists publications by classifying them by taxonomy
  48. CPT : Next or Previous term link when has not adjacent post
  49. Order posts by taxonomy terms
  50. Filter taxonomy by CPT
  51. automatically select taxonomy based on post meta
  52. I’m having trouble with Related Product “tax_query” ‘terms’ value
  53. get taxonomies from terms
  54. Display Custom Post Type Based on Taxonomy With WP_Query()
  55. How to order taxonomy terms by most recent post?
  56. Taxonomies are not showing in the category dropdown
  57. Taxonomy doesn’t follow slug permalink structure
  58. Get all posts for custom taxonomy term
  59. Custom Taxonomy – fields
  60. Pages of my taxonomy terms are showing all posts
  61. tax_query not working?
  62. Add active class to foundation 6 tabs while looping categories
  63. Filter Term By Parent Term – Custom Post Type
  64. Filter By Term Not Working – Custom Post Type
  65. Displaying the Taxonomy and a Queried Term on a taxonomy.php page?
  66. WordPress get all post with like in terms [duplicate]
  67. WordPress add taxonomies/terms list as a menu in archive page
  68. Decrement term in for each
  69. Fetch posts list from fist CPT taxonomy term and list under 2. CPT
  70. Create an additional template page for every term taxonomy
  71. Custom Search not working
  72. Exclude Custom Post Type from shared Custom Taxonomy
  73. Taxonomy Grid Archive Help?
  74. Custom post type URL returns 404 error page
  75. List a custom post type’s posts ordered by nested custom taxonomy
  76. Looping taxonomy in taxonomy?
  77. Author template – separate custom post type by custom taxonomy term for $curauth
  78. get_the_term_list() wanting to loop through the returned values
  79. List custom taxonomy terms
  80. Display associated taxonomy child name on single CPT page
  81. Issue On Listing Woocommerce Parent Tag List
  82. Add Category names to post lists of custom post type
  83. How to I add count of custom posts listed in a post as a prefix to its title
  84. WordPress taxonomy and terms question
  85. Taxonomy Archive URL + Template
  86. Renaming Custom Post Types and Taxonomies
  87. Inconsistent temporary 404s on whole install | PHP error with post-template.php
  88. How can I add dropdown widget/box to admin post page?
  89. How to create new category for custom post type?
  90. Received nothing after executing AJAX post function
  91. Categorize custom post type
  92. how to echo meta tag in header using php
  93. PHP question: how to combine syntax?
  94. Importing JSON feed giving Notice: Array to string conversion error
  95. Grab all Custom Posts by multiple taxonomies and terms
  96. How to display custom taxonomy term specific post?
  97. How to make sure, that only the selected post is changing?
  98. How to create TEMPLATES for TAXONOMIES? What I have to change in this code?
  99. Custom Post Status & Taxonomies
  100. How to add a post counter to the list of custom taxonomy terms?
techhipbettruvabetnorabahisbahis forumutaraftarium24eduseduedueduedusedusedueduseduedus