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POHaving trouble with Nokogiri and Rails
 

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  1. POHaving trouble with Nokogiri and Rails
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    <p>Been at this for a while. If i tell Category to just create, everything works fine. If I tell it to find_or_create I get errors.</p> <p>These work:</p> <pre><code>puts topic.at_xpath("@topicid") puts topic.at_xpath("@topicname") </code></pre> <p>and</p> <pre><code>Category.create!(:topic_id =&gt; topic.at_xpath("@topicid"), :name =&gt; topic.at_xpath("@topicname")) </code></pre> <p>But these don't:</p> <pre><code>Category.find_by_name(topic.at_xpath("@topicname")) </code></pre> <p>or</p> <pre><code>Category.find_or_create_by_topic_id_and_name(topic.at_xpath("@topicid"), topic.at_xpath("@topicname")) </code></pre> <p>Where am I messing up?</p> <pre><code>class FeedEntry &lt; ActiveRecord::Base require 'nokogiri' require 'open-uri' has_many :category_feeds has_many :categories, :through =&gt; :category_feeds accepts_nested_attributes_for :categories, :allow_destroy =&gt; true, :reject_if =&gt; proc { |obj| obj.blank? } def self.nokogiri_get_feed url = "http://some_feed.com/atom_feed" doc = Nokogiri::HTML(open(url)) doc.remove_namespaces! doc.search('feed entry').each do |item| unless exists? :guid =&gt; item.css('id').text create!(:name =&gt; item.css('title').text, :summary =&gt; item.css('title').text, :url =&gt; item.at_css("link")[:href], :published_at =&gt; item.css('updated').text, :guid =&gt; item.css('id').text) item.xpath('content').each do |i| i.css('topic').each do |topic| id = topic.at_xpath("@topicid") name = topic.at_xpath("@topicname") update_attributes!(:categories=&gt;[Category.find_or_create_by_topic_id_and_name(id, name)]) end end end end end end </code></pre> <p>errors are:</p> <pre class="lang-none prettyprint-override"><code>ruby-1.9.2-p180 :001 &gt; FeedEntry.nokogiri_get_feed TypeError: Cannot visit Nokogiri::XML::Attr from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/visitor.rb:21:in `rescue in visit' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/visitor.rb:15:in `visit' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/to_sql.rb:260:in `visit_Arel_Nodes_Equality' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/visitor.rb:15:in `visit' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/to_sql.rb:120:in `visit_Arel_Nodes_Grouping' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/visitor.rb:15:in `visit' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/to_sql.rb:91:in `block in visit_Arel_Nodes_SelectCore' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/to_sql.rb:91:in `map' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/to_sql.rb:91:in `visit_Arel_Nodes_SelectCore' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/to_sql.rb:77:in `block in visit_Arel_Nodes_SelectStatement' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/to_sql.rb:77:in `map' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/to_sql.rb:77:in `visit_Arel_Nodes_SelectStatement' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/sqlite.rb:7:in `visit_Arel_Nodes_SelectStatement' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/visitor.rb:15:in `visit' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/visitor.rb:5:in `accept' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/arel-2.0.9/lib/arel/visitors/to_sql.rb:19:in `block in accept' ... 11 levels... from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/xml/node_set.rb:238:in `each' from /Users/pca/projects/cdapp/cdrails/app/models/feed_entry.rb:35:in `block (2 levels) in nokogiri_get_feed' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/xml/node_set.rb:239:in `block in each' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/xml/node_set.rb:238:in `upto' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/xml/node_set.rb:238:in `each' from /Users/pca/projects/cdapp/cdrails/app/models/feed_entry.rb:33:in `block in nokogiri_get_feed' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/xml/node_set.rb:239:in `block in each' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/xml/node_set.rb:238:in `upto' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/xml/node_set.rb:238:in `each' from /Users/pca/projects/cdapp/cdrails/app/models/feed_entry.rb:30:in `nokogiri_get_feed' from (irb):1 from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.3/lib/rails/commands/console.rb:44:in `start' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.3/lib/rails/commands/console.rb:8:in `start' from /Users/pca/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.0.3/lib/rails/commands.rb:23:in `&lt;top (required)&gt;' from script/rails:6:in `require' from script/rails:6:in `&lt;main&gt;' </code></pre>
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      1. POHaving trouble with Nokogiri and Rails
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    1. This table or related slice is empty.
 

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