Jekyll数据管理最佳实践

# 在 _plugins/data_filters.rb 中添加自定义过滤器

module Jekyll
  module DataFilters
    
    def group_by(array, key)
      array.group_by { |item| item[key] }
    end
    
    def count_by(array, key)
      array.group_by { |item| item[key] }.transform_values(&:length)
    end
    
    def this_year(array, date_key = "date")
      current_year = Time.now.year.to_s
      array.select { |item| 
        item[date_key].to_s.start_with?(current_year)
      }
    end
    
    def this_month(array, date_key = "date")
      current_month = Time.now.strftime("%Y-%m")
      array.select { |item| 
        item[date_key].to_s.start_with?(current_month)
      }
    end
    
  end
end

Liquid::Template.register_filter Jekyll::DataFilters

# _plugins/data_validator.rb

module DataValidator
  def self.validate_movies(data)
    required_keys = ['id', 'title', 'poster', 'my_rating']
    errors = []
    
    data.each_with_index do |movie, index|
      required_keys.each do |key|
        if movie[key].nil? || movie[key].empty?
          errors << "Row #{index}: missing #{key}"
        end
      end
      
      # 验证评分范围
      if movie['my_rating'] && (movie['my_rating'] < 0 || movie['my_rating'] > 5)
        errors << "Row #{index}: invalid rating #{movie['my_rating']}"
      end
    end
    
    errors
  end
end

# 在构建时验证
 Jekyll::Hooks.on :site_generate do |site|
   movies = site.data['movies']['all']
   errors = DataValidator.validate_movies(movies)
   if errors.any?
     puts "❌ Data validation errors:"
     errors.each { |e| puts "  - #{e}" }
     abort "Build failed due to data validation errors"
   else
     puts "✅ Movie data validation passed"
   end
 end

# _plugins/lazy_data_loader.rb
# 对于超大数据，使用懒加载

module DataLoader
  @@data_cache = {}
  
  def self.load_data(file_path)
    return @@data_cache[file_path] if @@data_cache[file_path]
    
    full_path = Jekyll.sanitized_path(Dir.pwd, file_path)
    if File.exist?(full_path)
      @@data_cache[file_path] = YAML.load_file(full_path)
    else
      @@data_cache[file_path] = []
    end
  end
  
  def self.clear_cache
    @@data_cache = {}
  end
end

# 使用
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