ruby-on-rails - 如何将类/模块加载到模型中

Question

我正在 Ruby on Rails 上开发一个应用程序，但我被卡住了。我有一个类将所有奇怪的字符映射为普通字符（即 é, è -> e ）。我需要两个模型中的这个类，因为我不想重复代码，我想加载它以便模型可以使用它。知道该怎么做吗？

编辑*我上传课程*

类 UtfAnalyzer < Ferret::Analysis::Analyzer 包括 Ferret::Analysis

CHARACTER_MAPPINGS = {
    ['à','á','â','ã','ä','å','ā','ă']         => 'a',
    ['æ']                                     => 'ae',
    ['ď','đ']                                 => 'd',
    ['ć','č','ĉ','ċ']                         => 'c',
    ['è','é','ê','ë','ē','ę','ě','ĕ','ė',]    => 'e',
    ['ƒ']                                     => 'f',
    ['ĝ','ğ','ġ','ģ']                         => 'g',
    ['ĥ','ħ']                                 => 'h',
    ['ì','ì','í','î','ï','ī','ĩ','ĭ']         => 'i',
    ['į','ı','ij','ĵ']                         => 'j',
    ['ķ','ĸ']                                 => 'k',
    ['ł','ľ','ĺ','ļ','ŀ']                     => 'l',
    ['ñ','ń','ň','ņ','ʼn','ŋ']                 => 'n',
    ['ò','ó','ô','õ','ö','ø','ō','ő','ŏ','ŏ'] => 'o',
    ['œ']                                     => 'oek',
    ['ą']                                     => 'q',
    ['ŕ','ř','ŗ']                             => 'r',
    ['ś','š','ş','ŝ','ș']                     => 's',
    ['ť','ţ','ŧ','ț']                         => 't',
    ['ù','ú','û','ü','ū','ů','ű','ŭ','ũ','ų'] => 'u',
    ['ŵ']                                     => 'w',
    ['ý','ÿ','ŷ']                             => 'y',
    ['ž','ż','ź']                             => 'z'
}
HTML_MAPPINGS = {
    ['à', 'á', 'À', 'Á', 'ä', 'Ä']                => 'a',
    ['è', 'é', 'È', 'É', 'ë', 'Ë']                => 'e',
    ['ì', 'í', 'Ì', 'Í', 'ï', 'Ï']                => 'i',
    ['ò', 'ó', 'Ò', 'Ó', 'ö', 'Ö']                => 'o',
    ['ù', 'ú', 'Ù', 'Ú', 'ü', 'Ü']                => 'u',
    ['ç', 'Ç']                                                            => 'ç'
}

def self.token_stream(field, str)
  ts = MappingFilter.new(RegExpTokenizer.new(str, /([a-zA-Z0-9ÑñàáäèéëìíïòóöùúüÀÁÈÉËÌÍÏÒÓÖÙÚÜçÇ]|(&([aeiouAEIOU](acute|grave|uml)|ccedil|Ccedil);))+/), HTML_MAPPINGS)
  ts = MappingFilter.new(StandardTokenizer.new(str), CHARACTER_MAPPINGS)
  ts = MappingFilter.new(ts, CHARACTER_MAPPINGS)
  ts = LowerCaseFilter.new(ts)
end

结尾

Answer 1

使用模块：

module CharConverter
  def convert(c)
    #your conversion logic here
  end
end

然后在模型中包含模块：

class MyModel < ActiveRecord::Base
  include CharConverter
end

方法 convert 将在 MyModel 实例范围内为您提供（如MyModel.new.convert）。为了使您可以在 MyModel 类范围（如MyModel.convert）中使用 convert 替换include CharConverter为extend CharConverter.

您可以在此处找到有关扩展和包含之间区别的更多信息。