Module: HumanID::Extension::Pattern

Defined in:
lib/humanid/extension/pattern.rb

Class Method Summary collapse

Class Method Details

.compile(handy_pattern) ⇒ Object 



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# File 'lib/humanid/extension/pattern.rb', line 8

def compile(handy_pattern)
  case handy_pattern
    # compile(['Article', :name])
    #   => [{string: 'Article'}, {method: :name}]
    when Array then handy_pattern

    # compile(:name)
    #   => [{ method: :name }]
    when Symbol then [{ method: handy_pattern }]

    # compile(':id_:name')
    #   => [ [{method: :id}, {string: '_'}, {method: :name}] ]
    #
    # compile('_:article_name:id_')
    #   => [ [{string: '_'}, {method: :article_name}, {method: :id}, {string: '_'}] ]
    #
    # compile('article_:id')
    #   => [ [{string: 'article_'}, {method: :id}] ]
    #
    # http://rubular.com/r/AJFnJbmBRo
    #
    # http://stackoverflow.com/questions/16398471/regex-not-ending-with
    # ?<! - not ending with
    else [handy_pattern.scan(/([\w-]+)|(:\w+(?<![_-]))/).flatten.compact.map do |el|
      el.start_with?(':') ? { method: el[1..-1].to_sym } : { string: el }
    end]
  end
end

.guess(model_class) ⇒ Object

class CreateArticles < ActiveRecord::Migration

def change
  create_table :articles do |t|
    t.string :name
    t.text :content
  end
end

end

class Article < ActiveRecord::Base end

guess(Article)

=> :name



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# File 'lib/humanid/extension/pattern.rb', line 52

def guess(model_class)
  attrs = Traits.for(model_class).attributes
  attr  = attrs.find { |el| el.string? } || attrs.find { |el| el.primary_key? } || attrs.first
  attr.name
end

.result(compiled_pattern, model) ⇒ Object 



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# File 'lib/humanid/extension/pattern.rb', line 58

def result(compiled_pattern, model)
  compiled_pattern.map do |el|
    case el
      when Symbol then model.send(el)
      when Hash   then el.key?(:method) ? model.send(el[:method]) : el.fetch(:string)
      when Array  then result(el, model).join('')
      else el
    end
  end
end