searchkick HasMany Associations | index related model fields

  Project < ActiveRecord::Base
     searchkick

     has_many :categories_has_projects
     has_many :categories, through: :categories_has_projects

 end

  Category < ActiveRecord::Base

     has_many :categories_has_projects
     has_many :projects, through: :categories_has_projects

 end

class Project < ActiveRecord::Base
  def search_data
    attributes.merge(
      categories_title: categories.map(&:title)
    )
  end
end

Project.reindex and your search code above should work.

def search_data
    {
      name: name,
      intro: intro,
      bio: bio,
      tag_name: tags.map(&:name)
    }
end

参考文档：https://stackoverflow.com/questions/21382868/searchkick-index-related-model-fields        https://github.com/ankane/searchkick/issues/74