用于枚举的 i18n-tasks 自定义扫描器

Question

我想为 i18n-tasks 创建一个自定义扫描器，它可以检测 enums 在 中声明为 hashes型号.

我的 enum 声明模式永远是这样的：

class Conversation < ActiveRecord::Base
  enum status: { active: 0, archived: 1}, _prefix: true
  enum subject: { science: 0, literature: 1, music: 2, art: 3 }, _prefix: true
end

枚举将始终声明为散列，并且始终具有数字散列值，并且始终在声明末尾具有选项 _prefix: true。散列中可以有任意数量的值。

我的自定义扫描仪目前看起来像这样：

require 'i18n/tasks/scanners/file_scanner'
class ScanModelEnums < I18n::Tasks::Scanners::FileScanner
  include I18n::Tasks::Scanners::OccurrenceFromPosition

  # @return [Array<[absolute key, Results::Occurrence]>]
  def scan_file(path)
    text = read_file(path)
    text.scan(/enum\s([a-zA-Z]*?):\s\{.*\W(\w+):.*\}, _prefix: true$/).map do |prefix, attribute|
      occurrence = occurrence_from_position(
          path, text, Regexp.last_match.offset(0).first)
      model = File.basename(path, ".rb") #.split('/').last
      name = prefix + "_" + attribute
      ["activerecord.attributes.%s.%s" % [model, name], occurrence]
    end
  end
end

I18n::Tasks.add_scanner 'ScanModelEnums'

然而，这只是 return 每个散列的最后一个元素：

activerecord.attributes.conversation.status_archived
activerecord.attributes.conversation.subject_art

如何 return 每个散列的所有元素？我想看到这样的结果：

activerecord.attributes.conversation.status_active
activerecord.attributes.conversation.status_archived
activerecord.attributes.conversation.subject_science
activerecord.attributes.conversation.subject_literature
activerecord.attributes.conversation.subject_music
activerecord.attributes.conversation.subject_art

作为参考，i18n-tasks github 存储库提供了一个 example of a custom scanner.

它使用的文件扫描器class可以找到here。

Answer 1

这不是答案，这只是我所做的另一种尝试，它输出二维数组而不是单个数组：

require 'i18n/tasks/scanners/file_scanner'
class ScanModelEnums < I18n::Tasks::Scanners::FileScanner
  include I18n::Tasks::Scanners::OccurrenceFromPosition

  # @return [Array<[absolute key, Results::Occurrence]>]
  def scan_file(path)
    text = read_file(path)
    text.scan(/enum\s([a-zA-Z]*?):\s\{(.*)\}, _prefix: true/).map do |prefix, attributes|
      retval = []
      model = File.basename(path, ".rb")
      names = attributes.split(",").map!{ |e| e.strip; e.split(":").first.strip }
      names.each do |attribute|
        pos = (Regexp.last_match.offset(0).first + 8 + prefix.length + attributes.index(attribute))
        occurrence = occurrence_from_position(
            path, text, pos)
        name = prefix + "_" + attribute
        # p "================"
        # p type
        # p message
        # p ["activerecord.attributes.%s.%s" % [model, name], occurrence]
        # p "================"
        retval.push(["activerecord.attributes.%s.%s" % [model, name], occurrence])
      end
      retval
    end
  end
end

I18n::Tasks.add_scanner 'ScanModelEnums'

然而，这给了我一个关于第二个检测到的属性的错误：

gems/i18n-tasks-0.9.34/lib/i18n/tasks/scanners/results/key_occurrences.rb:48:in `each': undefined method `path' for ["activerecord.attributes.conversation.status_archived", Occurrence(app/models/project.rb:3:32:98::)]:Array (NoMethodError)

Answer 2

这个有效：

def scan_file(path)
  result = []
  text = read_file(path)

  text.scan(/enum\s([a-zA-Z]*?):\s\{(.*)}, _prefix: true$/).each do |prefix, body|
    occurrence = occurrence_from_position(path, text, 
                                            Regexp.last_match.offset(0).first)

    body.scan(/(\w+):/).flatten.each do |attr|
      model = File.basename(path, ".rb")
      name = "#{prefix}_#{attr}" 
      result << ["activerecord.attributes.#{model}.#{name}", occurrence]
    end
  end
  result
end

它类似于您的'answer'方法，但使用正则表达式获取'{...}'之间的所有内容，然后使用另一个正则表达式获取每个枚举键名。

您的 'answer' 版本引发错误的可能原因是它实际上返回一个三维数组，而不是两个：

外层.map是所有迭代的数组
每次迭代returnsretval，这是一个数组
retail 的每个元素都是 ['key', occurrence] 对的数组。

用于枚举的 i18n-tasks 自定义扫描器

i18n-tasks custom scanner for enums

ruby

enums

ruby-on-rails

rails-models

i18n-tasks