红地毯脚注扩展名不起作用

Question

我正在尝试使链接的脚注生效，但是Redcarpet根本不认识到我要传递给初始化程序的footnote扩展名。 我正在运行Redcarpet版本3.3.4，应该将脚注功能合并到master中，如以下博文所述：博文1

发布2

客户渲染器类CustomMarkdownParser <Redcarpet :: Render :: HTML

    include ActionView::Helpers::UrlHelper
    include ActionView::Helpers::AssetTagHelper
    include AbstractController::Rendering

    def block_code(code, language)
        Pygments.highlight(code, lexer: language)
    end

    def parse_media_link(link)
    end


    def image(link, title, alt_text)
    end

    def link(link, title, content)
    end

    #def footnote_def(content, number)
    #end

    #def footnote_ref(number)
    #end
end

application_helper中的markdown函数

def md_parser(content)
    puts "Parsing Markdown"
    renderer = CustomMarkdownParser.new(
            hard_wrap: true,
            filter_html: true,
            with_toc_data: true)

    options ={

    }

    markdown = Redcarpet::Markdown.new(renderer,
                                       autolink: true, # detect links and wrap them in link tags
                                       no_intra_emphasis: true, # ensures _ inside words are not repolaced with <em> tags
                                       disable_indented_code_blocks: true, # does not convert lines prefixed with 4 spaces
                                       fenced_code_blocks: true,
                                       lax_spacing: true,
                                       strikethrough: true,
                                       footnotes: true,
                                       superscript: true,
                                       tables: true,
                                       underline: true
    )

    markdown.render(content).html_safe
end

我查看了gem的代码，它列出了以下扩展名：

EXTENSION_MAP = {
# old name => new name
:autolink         => :autolink,
:fenced_code      => :fenced_code_blocks,
:filter_html      => :filter_html,
:hard_wrap        => :hard_wrap,
:prettify         => :prettify,
:lax_htmlblock    => :lax_spacing,
:no_image         => :no_images,
:no_intraemphasis => :no_intra_emphasis,
:no_links         => :no_links,
:filter_styles    => :no_styles,
:safelink         => :safe_links_only,
:space_header     => :space_after_headers,
:strikethrough    => :strikethrough,
:tables           => :tables,
:generate_toc     => :with_toc_data,
:xhtml            => :xhtml,

# old names with no new mapping
:gh_blockcode => nil,
:no_tables    => nil,
:smart        => nil,
:strict       => nil
}

我不确定为什么不包括脚注。 我收到的输出是这个（将^读为上标，右方括号也被上标）：Atlantic [^ 1]，[^ 1]这是脚注

Answer 1

在自定义渲染器中，您将覆盖处理脚注的方法，以使它们不执行任何操作。 只需删除这些方法（ footnote_def和footnote_ref ），然后运行原始方法即可。

另外，脚注定义的语法需要冒号，您似乎会遗忘了该冒号：

[^1]: This is the footnote