Ruby + Nokogiri: Looping through array of divs and finding text within them - ruby

Question

I have this HTML, notice everything is nested inside a .listing div:
<div id="listing_1085130_featured" class="item listing 1085130 even featured selected" data-blockindex="0" se:map:point="40.7219,-74.0034" se:map="map" se:behavior="selectable hoverable rememberable clickable mappable" style="cursor: pointer;">
<div class="item_inner ">
<div class="featured_tag hidden-xs">Featured Listing</div>
<div class="selected_marker hidden-xs hidden-sm">
<div id="results_list" class="photo">
<a href="/building/27-wooster/ph?featured=1">
<img border="0" src="https://s3.amazonaws.com/img.streeteasy.com/nyc/image/47/76017947.jpg" alt="27 Wooster Street #PH">
</a>
<div id="featured-tag-on-responsive" class="visible-xs">Featured Listing</div>
</div>
<div class="details">
<div class="details_title">
<h5>
<a se:clickable:target="true" href="/building/27-wooster/ph?featured=1">27 Wooster Street #PH</a>
</h5>
<div class="item_tools">
</div>
<div class="closer"></div>
<div class="details_info first_detail_info">
<div class="details_info">
<div class="details_info">
<div class="details_info">
</div>
<div class="closer"></div>
</div>
</div>
....
I have a bunch of these and How would I grab the href of the first link inside #results_list, which would be /building/27-wooster/ph?featured=1 in this case.
This is my method so far:
require 'json'
require 'open-uri'
require 'nokogiri'
def scrape(page_number)
doc = Nokogiri::HTML(open("http://streeteasy.com/for-sale/soho?page=#{page_number}sort_by=price_desc"))
doc.css(".listing").each do |listing|
# grab data inside that specific listing
end
end
Is there a way to look within just that listing? like listing.children("#results_list a").first.href

Answer 1

Well this worked for me:
doc.css("#results_list/a").each do |listing|
p listing['href']
end
To get just the first listing, use at_css, replacing the code above with this one line should produce the same result:
doc.at_css("#results_list/a")['href']

Answer 2

Is there a way to look within just that listing?
Yes, but in html an id has to be unique to the page, so it's doubtful that all your .listing divs each contain a div with an id="results_list". However, nokogiri doesn't seem to have a problem with multiple identical ids:
require 'nokogiri'
html = <<'END_OF_HTML'
<div class="item listing 1085130 even featured selected">
<div>
<div id="results_list" class="photo">
hello
apple
</div>
</div>
</div>
<div class="item listing 1085131 even featured selected">
<div>
<div id="results_list" class="photo">
world
cherry
</div>
</div>
</div>
<div class="item listing 1085132 even featured selected">
<div>
<div id="results_list" class="photo">
goodbye
peach
</div>
</div>
</div>
END_OF_HTML
doc = Nokogiri::HTML(html)
doc.css(".listing").each do |div|
a_tag = div.at_xpath('.//div[#id="results_list"]/a')
puts a_tag.text
end
--output:--
hello
world
goodbye
at_xpath() searches for the first matching element.
.// searches within the current element