檢查，如果標籤將其添加到陣列

Question

之前就存在，我有以下代碼：

unless params[:search_tags].nil? 
    logger.debug "Going through tags now #{params[:search_tags]}" 
    params[:search_tags].split(",").each{ |tag| 
    tag.strip! 
    tag = '%' + tag + '%' 
    tags = Tag.find(:all, :conditions => ["name LIKE ?", tag]) 
    if tags.nil? || tags.empty? # I'm searching for something that does not actually exist! 
     @listings = [] 
    else 
     tags.each {|tag| 
     logger.debug "Checking #{tag}"; @listings = @listings & tag.listings 
     } 
    end 
    } 
    logger.debug "I have #{@listings.size} listings left after hashtag stripping" 
end 

問題是，如果我輸入2個標籤和1不存在，不返回任何結果。如果在添加標籤之前存在標籤，我想添加一個檢查檢查。

Answer 1

試試這個：

unless params[:search_tags].nil? 
     logger.debug "Going through tags now #{params[:search_tags]}" 
     params[:search_tags].split(",").each do |tag| 
     tag.strip! 
     tag = '%' + tag + '%' 
     tags = Tag.find(:all, :conditions => ["name LIKE ?", tag]) 

     @listings = [] 

     unless tags.nil || tags.empty? 
      tags.each do |tag| 
      logger.debug "Checking #{tag}"; 
      @listings << tag.listings 
      end 
     end 
     @listings = @listings.uniq 
     end 
     logger.debug "I have #{@listings.size} listings left after hashtag stripping" 
    end