ruby-on-rails - ruby rails : Unable to retrieve regex from database

Question

我有一组正则表达式，存储在数据库的某个表中。我检索它们并使用这些正则表达式应用一些操作，但它们没有按预期工作。

junkremoveregex=[]
    regexes = JunkRemoveLineRegex.find(:all,:select => 'regex')

    regexes.each do |regex|
      junkremoveregex << regex.regex
    end

    puts junkremoveregex

    junktest=/note/

    junkremoveregexset=Regexp.union(junkremoveregex)
    line ="note thhat yo yo honey singh".downcase
    if(line.match(junkremoveregexset))
      puts "note was found in line"
    else
      puts "No line was found"
    end

这段代码的输出是没有找到行。

如果我使用这段代码，那么它会完美地工作

junkremoveregex=[]
    regexes = JunkRemoveLineRegex.find(:all,:select => 'regex')

    regexes.each do |regex|
      junkremoveregex << regex.regex
    end

    puts junkremoveregex

    junktest=/note/

    junkremoveregexset=Regexp.union(junktest)
    line ="note thhat yo yo honey singh".downcase
    if(line.match(junkremoveregexset))
      puts "note was found in line"
    else
      puts "No line was found"
    end

Puts junkremoveregex 给出/note/

如何解决这个问题？

Answer 1

如 BroiSatse 所述，您的正则表达式以字符串格式出现，您需要先将其转换回正则表达式格式。为此你需要使用这个 gem http://rubygems.org/gems/to_regexp

"/note/".to_regexp
#=> /note/

或者在你的情况下

junkremoveregexset.to_regexp