Editor / Add Media: Is it possible to only allow galleries?

I’m used to deal with ACF configurations and I think that the solution to your problem is quite simple, and is integrated in the ACF “gallery” field configuration options.

Check out this link, where you will find described all the options for a “gallery” field. As you will see, there’s a parameter “minimum selection” which description is:

The minimum number of images that are required for the field to
validate. Defaults to 0

As simple as writing ‘2’ in the configuration panel for this specific field, and ACF will check before saving if there are two or more images. If not, an alert message will appear.

I hope it helps!

Related Posts:

  1. Custom Post Types: How-to get rid of editor (-meta box)
  2. Visual editor issue by having multiple tiny mce editors in a CPT
  3. Is it possible to activate customfield ‘text description’ upon activating the customfield ‘checkbox’?
  4. Extending the search context in the admin list post screen
  5. what is the correct way to compare dates in a WP query_posts meta_query
  6. Advanced search form with filters for custom taxonomies and custom fields
  7. Enable Gutenberg on custom post type
  8. How to Add Custom Fields to a Custom Post Type?
  9. How to display value of custom fields in page
  10. Prevent post from being published if custom fields not filled
  11. Multiple orderby values in WP_Query
  12. How do I set the default admin sort order for a custom post type to a custom column?
  13. Help Creating a Slideshow Custom Post Type with Custom Meta Boxes?
  14. don’t publish custom post type post if a meta data field isn’t valid
  15. Do_Shortcode not working for Embed
  16. Possible to turn off autosave for single custom post type
  17. Using meta_query, how can i filter by a custom field and order by another one?
  18. Custom Post Type Data in Sidebar widgets?
  19. Front end post editing using a form
  20. Return all custom meta data for one custom post type
  21. meta_query for keys that aren’t yet set
  22. How can I change the admin search posts fields?
  23. Enable sticky posts to custom post_type
  24. Truncating custom fields
  25. How to filter custom posts by tags and custom fields?
  26. Development of a WordPress Search Plugin – Best Practices
  27. Custom field values deleted when trashing custom post type
  28. Automatically set post title to same value as a meta box
  29. How to get all custom fields of any post type
  30. Display custom post type and custom fields within a Bootstrap Carousel
  31. Admin Area Custom Type Search By Meta Fields Without Title & Content
  32. WordPress 4.4+ : How to revision CPT + metadata
  33. Search multiple custom fields by using meta_query
  34. How do I Paginate Search Results for Custom Post Types?
  35. Custom Post Type – Taxonomy Dropdown Menu?
  36. How to order adjacent posts (prev / next) by custom field value?
  37. WP_Query orderby custom field then post_date in one query
  38. Using Custom Fields in Custom Post Type URL
  39. What should I use – Taxonomies, custom fields, Post Type?
  40. Query custom post type by custom field
  41. Hide custom post type field from author?
  42. how to filter by last name for custom post
  43. Search that will look in custom field, post title and post content
  44. How can I add a column/s to wp_posts table?
  45. Many to Many Relationship between Two Custom Post Types
  46. clients list using wordpress
  47. Filtering a WP_Query meta_query by numeric values isn’t working
  48. Sorting a query by custom field date
  49. Custom Taxonomy Template Post List with Sort Order
  50. Automatically fill custom field value on post publish/update
  51. echo value from ‘select’ field type into page template using cmb2?
  52. Adding meta values to permalink
  53. How can I generate a RSS feed based on a custom WP_Query?
  54. Right way of storing large number of custom post fields
  55. wordpress plugin error handling
  56. Filtering a WP Query result
  57. Creating Photo Gallery System with Custom Post Type
  58. Querying custom post type with 2 custom fields (date-range)
  59. manage posts custom column is not populating data from meta boxes
  60. Create child page within custom post type
  61. How to filter custom post type archive by meta value
  62. How to add button to post page WordPress 5.x
  63. Prevent reload confirmation after AJAX save
  64. Filter a custom field based on selection of another custom field (ACF) [closed]
  65. Display Custom Post Type Fields
  66. How do I implement custom fields without using any plugins?
  67. How Can I save multiple records in same meta key?
  68. Add custom field to media attachment image attribute in post editor
  69. How to get custom metabox image field?
  70. Set post title from two meta fields
  71. Using custom field as custom post title
  72. How to do a custom bookmarks post type?
  73. How do I add media to a custom post type?
  74. Passing Variable as URL Parameter — Security concerns?
  75. Is it possible to define the data type of a Custom Field?
  76. Detect meta value changes when post is updated (post_updated)
  77. Getting Bootstrap accordion working in WordPress loop with custom post type (collapsing issue)
  78. Creating a gallery of featured images from custom post type
  79. Search everything (posts, pages, tags, cpt, meta)
  80. How I check if the same post slug has not been used before publishing?
  81. How to hook get_terms() to only show count of posts that have custom meta
  82. Custom post type or just use custom fields
  83. Retrieving values of custom fields in Quick Edit mode
  84. ACF Relationships in Custom Post Type Permalink
  85. How to sort a table of custom posts by column containing custom field
  86. Search Custom Post Type with all meta attached?
  87. How to make a page template to list all galleries?
  88. WordPress Search documentation: how to improve search query using taxonomy terms, custom meta fields?
  89. Issue with saving custom post type when editor is removed
  90. Rewrite custom post type url’s adding meta box values
  91. set and unset the custom field value
  92. Custom field being erased after autosave
  93. order by meta_value serialized array
  94. Order custom posts by a date metabox
  95. Orderby custom field for custome post type
  96. How to select one major category (or custom taxonomy) for a custom post type?
  97. How to sort CPT by custom meta value (date), and return posts month by month
  98. List upcoming events, ordered by date in a custom field
  99. Creating a gallery custom post type?
  100. Custom Post Type with Custom Title
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)