Is it possible to add relation between meta_query and tax_query?

This is not possible with the WP_Query. You can specify relationship inside the tax query and inside the meta query, but, you can’t have the query where meta and tax query are connected by OR.

You can always build the SQL query the way you want it, not relying on the WP_Query at all to filter posts exactly the way you want it. Or, you can use two WP_Query objects, one with meta_query, other with tax_query, and merge the results. In case you have a lot of posts, or you need pagination, that will be a challenge to make optimized.

Related Posts:

  1. Nested meta_query with multiple relation keys
  2. Does tax_query really beats meta_query in all situations?
  3. WooCommerce: filter by parent product’s taxonomy and product variation’s meta data
  4. Querying by taxonomy vs Querying by Custom fields Speed Comparison
  5. Tax query clause inside a meta query clause?
  6. Is it a good idea to improve meta query performance by adding tax query?
  7. Tax query AND/OR meta query [duplicate]
  8. Query with meta_query and tax_query together not working properly
  9. How to search for meta_query LIKE or tax_query LIKE and grab these posts on search results?
  10. WP_Query for a taxonomy value OR a custom post type meta field
  11. Extending WP Query: Custom geolocation meta values work, but tax_query breaks
  12. Custom query with custom filtering returning incorrect results
  13. WP Query Args – Title or Meta Value
  14. Meta query with string starting like pattern
  15. Query WooCommerce orders where meta data does not exist
  16. Execute a large WP_Query with many “AND” Meta_Queries?
  17. Query all posts where meta value is empty
  18. WP_Query min and max values
  19. querying with custom meta field with meta_query
  20. Order by two meta keys
  21. multiple meta key but get server load is very high
  22. A WP_Query that will look for posts after 2 weeks ago OR with a certain meta value
  23. Finding all results from database within 500 miles of the given latitude and longitude [closed]
  24. if wp_query taxonomy term have posts
  25. Combine tax_query and meta_query in WP_Query
  26. Get term by custom term meta and taxonomy
  27. Use meta_query to display events by date in custom field
  28. Meta-value query
  29. Meta query field order together with post_date order causes posts without the meta field to be unordered
  30. tax_query OR with empty result returns all posts
  31. pre_get_posts filter meta_query without conflicting existing meta_query
  32. Undefined property: WP_Query::$post
  33. Programmatically set ‘meta_query’ for filter
  34. Get list of terms that have posts in another term
  35. WP_Query meta_query >= date
  36. Extending woocommerce admin product search
  37. Complex Orderby Parameters: How to query with multiple orderby parameters using meta_value_num?
  38. Adding an array from a query string to a WP meta_query
  39. Query multiple meta values
  40. Optional Meta Query
  41. Query by multiple meta elements not seeming to work – wordpress is timing out
  42. Fetch posts that match term slug first two letters (wp query)
  43. WP_Query tax query part of slug
  44. Meta_query on same meta key, with diffrenct values
  45. Can we return all category (not post) with Custom Query Filter? [closed]
  46. How does one perform a sub query with different post types
  47. how to make members list directory through wordpress post custom meta key.
  48. WP_Query with meta_query dosen’t return results
  49. meta_compare not comparing whole integer
  50. meta queries do ‘either/or’ checks
  51. WP Query ordering on a meta field for posts with a date in the future not ordering by datetime
  52. Selecting posts with a given meta value for a meta key
  53. Get every post with value in meta key
  54. get_page meta query not working, maybe a bug?
  55. Show single posts date, in a page of posts
  56. WP_Query Class custom field parameters
  57. WP_Query not returning correct result with meta_query parameter
  58. meta_query where the meta value is not the post title
  59. Order WP_Query by meta_key priority when ‘OR’ relation used for multiple meta values
  60. Facing problem with tax_query results
  61. How do i create a custom post query when the meta value is an array?
  62. meta_query with meta values as serialize arrays
  63. Woocommerce Get Orders By Meta Value
  64. meta_query is overriding default search
  65. Multiple WP_Query args combinations according to post type
  66. WP_Query multiple value not working
  67. How to do WP_User_Query for Nested Array value Inside Nested Array field
  68. Custom query to retrieve oldest post and retrieve others with date interval
  69. WP_User_Query Orderby Not Working
  70. Unusual high query of user meta data
  71. Very slow query generated getting meta data from posts
  72. WordPress post_status and meta_query
  73. WordPress Query optimaization for slow query
  74. How to filter on placeholder image
  75. Tax_Query not working – connecting to second wordpress database
  76. Slow wp_posts and wp_postmeta query using Advance Custom Fields
  77. Meta query doesn’t remove placeholder escape before query
  78. WP Query Meta Query
  79. in tax_query this Is the code correct? I need to access beginner video posts for different subject
  80. Query custom meta value – post view and date meta
  81. How can I modify standard search query to include also ACF custom fields values?
  82. Custom WP_query and integrating into theme file
  83. WP_Query – show posts where meta value and user_email match
  84. Custom taxonomy and query multi conditions
  85. Best way to Order Post in Home without a plugin
  86. Empty ‘terms’ in ‘tax_query’ returns an empty array
  87. WP_Query: Meta_Query with serialized value (or a workaround)
  88. WP_Query using meta_query with LIKE doesn’t return what it should
  89. Return a single custom post from multiple meta queries
  90. query post based on comparison
  91. Including ‘cat’ => $cat breaks meta_query
  92. Query string form $_GET[‘value’] is not working as meta value in wp_query
  93. Can’t figure out query logic
  94. WP_Query orderby not working on custom post_type
  95. 294 Queries on Mainpage of WordPress
  96. WP_Query with tax_query not working
  97. How to get all post_id and meta_value using meta_key in wp_postmeta table
  98. WP Query – Show custom posts only if user contain some user meta
  99. How do I subquery with custom meta fields?
  100. Showing Counts on Comment List with Custom Query
error code: 523