Query posts by custom fields (object post)

If you use Post Object field type, then it is stored as ID in custom field. So this should do the trick:

$posts = get_posts(array(
    'numberposts'   => -1,
    'post_type'     => 'post',
    'meta_key'      => '<FIELD_NAME>',
    'meta_value'    => <POST_ID>
));

PS. You should use ‘posts_per_page’ instead of ‘numberposts’ (which is deprecated).

Related Posts:

  1. How to update custom fields using the wp_insert_post() function?
  2. Make custom field meta not display if there is not data in it
  3. How can I add extra word in permalink when someone click download button?
  4. Which PHP page is the Default Posts Page
  5. WP_Query: getting posts where custom field exists
  6. Unable to render custom field after attempt to generate a list of recent post in page template
  7. Woocommerce Custom Meta Boxes- How to only display if they actually have content
  8. Query on a repeater date (acf)
  9. When working with a post, almost all wp_postmeta are deleted
  10. Posts sortable column not sorting properly for custom field numbers
  11. Update all posts automatically when using post_meta
  12. Display posts by month
  13. Custom SQL query to get List of posts with featured image url
  14. How to display multiple Post meta_key/meta_values by SQL query
  15. How to make an meta_query optional?
  16. get_the_content if it contains multiple lines it results in SyntaxError
  17. Looking to exclude blog posts from category Previous/Next buttons
  18. How can update custom meta for all posts
  19. Automatic Excerpt Not Working
  20. Unique key for each row in a repeater field
  21. Using a javascript file to access a get posts array
  22. How is WordPress manipulating the posts like there are folders?
  23. Trying to make php run in a post
  24. Remove posts after a given amount of time
  25. Hide wordpress field if data is empty in post!
  26. How can I create a list of page titles from custom meta values?
  27. How to show part of the_content?
  28. How to set a min number of words for a blog post
  29. Get post id in a function when edit/add a post
  30. Why do WP_Query results change after updating unrelated Advanced Custom Fields (ACF)?
  31. Store multiple custom field as post meta per post(css, js, html, 2 link) [closed]
  32. How to use thumbnail size of image if I’m only using src to get image
  33. 3 Slashes appear after Apostrophe in custom fields after updating product-site
  34. Loading index.php contents which located outside blog folder for post single page
  35. get post content of particular post by url
  36. Trying to retrieve post meta
  37. Redirect to another page using contact form 7? [closed]
  38. Advanced Custom Fields – display label and value only if value entered
  39. Pagination on Custom Post
  40. $wpdb returns duplicate posts
  41. Update post title from external file?
  42. Why is a wp function used in current PHP namespace’s callback not resolved to global scope?
  43. if custom field doesn’t exist, use post thumbnail instead, as image background
  44. How to use mysql LIKE with wpdb?
  45. How to store multiple custom meta box
  46. Do I need to edit my theme in order to change the title of my blog page?
  47. Add new post in existing categories using wp_insert_post
  48. How do I add more options to the post-new.php page?
  49. Get the id of all images in a post
  50. Do not duplicate posts with multiple categories in multiple loops
  51. Four posts per row [closed]
  52. Need help removing […] after excerpt
  53. Define category ID using get_post_meta
  54. WordPress Search
  55. Adding custom url to readmore link using get_permalink()
  56. Display movies that apear this day next
  57. Add “alt” Attribute to GD Star Rating Tags
  58. custom header text
  59. Add custom fields from different posts
  60. Pagination in single.php
  61. Edit and delete permissions pages and posts
  62. Order category posts by last word of custom field
  63. Post form – AJAX won’t upload featured image – Plugin development
  64. Block error message in foreach loop when looping through ACF field
  65. How to get post image caption by index
  66. Is there anyway I can call the year once?
  67. Check $post->ID against multiple values
  68. Posts missing on author page
  69. How to allow users to save list of posts in wordpress?
  70. Can I disable auto increment of WordPress Posts Database to utilize previously deleted records?
  71. How to center all text body in single.php at once?
  72. LinkedIn Share Post Button
  73. Get current_post in reverse order with pagination
  74. How to display custom field from a gallery thumbnail?
  75. How do I generate formatted permalinks as specified in backend options?
  76. Getting a value from a custom field from a page that shares a parent with the current page
  77. How do I get the featured post to share on Social Media and show on Individual Post pages?
  78. Basic PHP question (displaying post title over thumbnail) [closed]
  79. Post from front end form to post_meta
  80. media_handle_sideload() returned post_id being incremented
  81. Saving Post redirects to 404 page when php $_GET variable in post body
  82. If custom field doesn’t exist, or exists and it’s true show title?
  83. How can I add WordPress Audio Player as featured audio in Audio Blog Posts?
  84. Outputting a custom field in PHP
  85. Custom fields randomly stop working
  86. Where can I find the code for the menu page meta boxes?
  87. How to echo a different field if another field is empty?
  88. PHP Puzzle: Unique Styles with PHP loop
  89. link to page_for_posts
  90. How to create a loop that will display one post and stop?
  91. $post->ID calls for current page, but what is the code to call for any new page created and published in WordPress?
  92. Add multiple HTML attributes to an Elementor button
  93. How to create a WordPress PAGE in another folder?
  94. How do I get a function to work in single.php
  95. I want to show image from custom field image on my custom page template
  96. Search custom post type posts only by meta fields?
  97. How to pass value to add_filter wpcf7_form_tag from another function?
  98. Count the number of matching post names in foreach loop
  99. Need Help With Making Full-Width Template for Blog Posts (common methods aren’t working)
  100. ACF number less than comparison not working