Disallow numeric-only hashtags (#11363)

* Add spec covering numeric-only hashtags

* Fix hashtag regex

1 files changed, 2 insertions, 2 deletions

diff --git a/app/models/tag.rb b/app/models/tag.rb
index 01bace2bb..b371d59c1 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -17,10 +17,10 @@ class Tag < ApplicationRecord
   has_many :featured_tags, dependent: :destroy, inverse_of: :tag
   has_one :account_tag_stat, dependent: :destroy
 
-  HASHTAG_NAME_RE = '[[:word:]_][[:word:]_]*[[:alpha:]_·]*[[:word:]_·]*[[:word:]_]'
+  HASHTAG_NAME_RE = '([[:word:]_][[:word:]_·]*[[:alpha:]_·][[:word:]_·]*[[:word:]_])|([[:word:]_]*[[:alpha:]][[:word:]_]*)'
   HASHTAG_RE = /(?:^|[^\/\)\w])#(#{HASHTAG_NAME_RE})/i
 
-  validates :name, presence: true, uniqueness: true, format: { with: /\A#{HASHTAG_NAME_RE}\z/i }
+  validates :name, presence: true, uniqueness: true, format: { with: /\A(#{HASHTAG_NAME_RE})\z/i }
 
   scope :discoverable, -> { joins(:account_tag_stat).where(AccountTagStat.arel_table[:accounts_count].gt(0)).where(account_tag_stats: { hidden: false }).order(Arel.sql('account_tag_stats.accounts_count desc')) }
   scope :hidden, -> { where(account_tag_stats: { hidden: true }) }