Ruby on rails 在将标记添加到数组之前,请检查标记是否存在
我有以下代码:Ruby on rails 在将标记添加到数组之前,请检查标记是否存在,ruby-on-rails,Ruby On Rails,我有以下代码: 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 ?"
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
问题是,若我输入了2个标记,而1个不存在,那个么它不会返回任何结果。我想在添加标记之前添加一个检查标记是否存在。尝试以下操作:
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
除非参数[:search_tags].nil?
logger.debug“现在查看标记#{params[:search_tags]}”
参数[:搜索标记]。拆分(“,”)。每个do标记|
脱衣!
标记=“%”+标记+“%”
tags=Tag.find(:all,:conditions=>[“名称类似?”,Tag])
@清单=[]
除非tags.nil | | tags.empty?
标记。每个do |标记|
logger.debug“检查#{tag}”;
@清单tag.listings看起来怎么样?您希望@listings怎么样?