Parse REXML Document, ignoring whitespace

Should REXML ignore identation or whitespacing?

I am debugging an issue with a simple HTML to Markdown convertor. For some reason it fails o开发者_StackOverflown

<blockquote><p>foo</p></blockquote>

But not on

<blockquote>
  <p>foo</p>
</blockquote>

The reason is, that in the first case, type.children.first.value is not set, in the latter case it is. The original code can be found at link above, but a condensed snipped to show the problem is below:

require 'rexml/document'
include REXML

def parse_string(string)
  doc = Document.new("<root>\n"+string+"\n</root>")
  root = doc.root
  root.elements.each do |element|
    parse_element(element, :root)
  end
end

def parse_element(element, parent)
  @output = ''
  # ...
  @output << opening(element, parent)
  #...
end

def opening(type, parent)
  case type.name.to_sym
    #...
    when :blockquote
       # remove leading newline
      type.children.first.value = ""
      "> "
  end
end

#Parses just fine
puts parse_string("<blockquote>\n<p>foo</p>\n</blockquote>")

# Fails with undefined method `value=' for <p> ... </>:REXML::Element (NoMethodError)
puts parse_string("<blockquote><p>foo</p></blockquote>")

I am quite certain, this is due to some parameter that makes REXML require whitespacing and identation: why else would it parse the first XML different from the latter?

Can I force REXML to parse both the same? Or am I looking at a whole different kind of bug?

---

Try passing the option :ignore_whitespace_nodes=>:all to Document.new().