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