1 files changed, 26 insertions, 0 deletions
diff --git a/app/models/user_detail.rb b/app/models/user_detail.rb
index 5dc74421705..9674f9a41da 100644
--- a/app/models/user_detail.rb
+++ b/app/models/user_detail.rb
@@ -1,7 +1,33 @@
 # frozen_string_literal: true
 
 class UserDetail < ApplicationRecord
+  extend ::Gitlab::Utils::Override
+  include CacheMarkdownField
+
   belongs_to :user
 
   validates :job_title, length: { maximum: 200 }
+  validates :bio, length: { maximum: 255 }, allow_blank: true
+
+  before_save :prevent_nil_bio
+
+  cache_markdown_field :bio
+
+  def bio_html
+    read_attribute(:bio_html) || bio
+  end
+
+  # For backward compatibility.
+  # Older migrations (and their tests) reference the `User.migration_bot` where the `bio` attribute is set.
+  # Here we disable writing the markdown cache when the `bio_html` column does not exists.
+  override :invalidated_markdown_cache?
+  def invalidated_markdown_cache?
+    self.class.column_names.include?('bio_html') && super
+  end
+
+  private
+
+  def prevent_nil_bio
+    self.bio = '' if bio_changed? && bio.nil?
+  end
 end