nokogiri：如何在表格標籤後立即插入tbody標籤？

Question

我想確保所有表的直接孩子都是tbody ....

我該怎麼寫xpath或nokogiri？

doc.search("//table/").each do |j| 
    new_parent = Nokogiri::XML::Node.new('tbody',doc) 
    j.replace new_parent 
    new_parent << j 
end 

Answer 1

require 'rubygems' 
require 'nokogiri' 

html = Nokogiri::HTML(DATA) 
html.xpath('//table').each do |table| 

    # Remove all existing tbody tags to avoid nesting them. 
    table.xpath('tbody').each do |existing_tbody| 
    existing_tbody.swap(existing_tbody.children) 
    end 

    tbody = html.create_element('tbody') 
    tbody.children = table.children 
    table.children = tbody 
end 

puts html.xpath('//table').to_s 

__END__ 
<table border="0" cellspacing="5" cellpadding="5"> 
    <tr><th>Header</th></tr> 
    <tbody> 
    <tr><td>Data</td></tr> 
    <tr><td>Data2</td></tr> 
    <tr><td>Data3</td></tr> 
    </tbody> 
</table> 

打印

<table border="0" cellspacing="5" cellpadding="5"><tbody> 
<tr><th>Header</th></tr> 
<tr><td>Data</td></tr> 
<tr><td>Data2</td></tr> 
<tr><td>Data3</td></tr> 
</tbody></table>