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# frozen_string_literal: true
class Tag < ApplicationRecord
has_and_belongs_to_many :statuses
HASHTAG_RE = /(?:^|[^\/\)\w])#([[:word:]_]*[[:alpha:]_][[:word:]_]*)/i
validates :name, presence: true, uniqueness: true
def to_param
name
end
class << self
def search_for(terms, limit = 5)
terms = Arel.sql(connection.quote(terms.gsub(/['?\\:]/, ' ')))
textsearch = 'to_tsvector(\'simple\', tags.name)'
query = 'to_tsquery(\'simple\', \'\'\' \' || ' + terms + ' || \' \'\'\' || \':*\')'
sql = <<-SQL.squish
SELECT
tags.*,
ts_rank_cd(#{textsearch}, #{query}) AS rank
FROM tags
WHERE #{query} @@ #{textsearch}
ORDER BY rank DESC
LIMIT ?
SQL
Tag.find_by_sql([sql, limit])
end
end
end
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