如何在 Blacklight 中为文档标题添加自定义逻辑?

How can I add custom logic for the title of a document in Blacklight?

我不想定义单个 title_field,而是想根据文档的内容显示自定义标题。根据 Blacklight Wiki 这可以通过将 config.index.document_presenter_class 设置为自定义演示者来实现:

# app/controllers/catalog_controller.rb
class CatalogController < ApplicationController
  ...
  configure_blacklight do |config|
    ...
    config.index.document_presenter_class = MyPresenter
    ...
  end
  ...
end

自定义演示者覆盖 label 方法的地方:

# app/presenters/my_presenter.rb
class MyPresenter < Blacklight::IndexPresenter
  def label(field_or_string_or_proc, opts = {})
    # Assuming that :main_title and :sub_title are field names on the Solr document.
    document.first(:main_title) + " - " + document.first(:sub_title)
  end
end

当我这样做时,我的自定义标签方法似乎没有被调用,我通过添加 puts 语句和调试器断点进行了检查。

是否有我可能遗漏的内容或显示自定义文档标题的其他方式?

在我的演示者中覆盖 heading 方法 class 对我有用:

# app/presenters/my_presenter.rb
class MyPresenter < Blacklight::IndexPresenter
  def heading
    # Assuming that :main_title and :sub_title are field names on the Solr document.
    document.first(:main_title) + " - " + document.first(:sub_title)
  end
end