ruby-rdf / rdf-json Goto Github PK

According to the docs RDF::Reader.for(:json) should return RDF::JSON::Reader but is returning nil instead.

It's time to change from the json_pure dependency to using the multi-json gem.

As a straightforward extension of strict RDF/JSON, consider implementing support for parsing CURIE predicates (e.g. "[foaf:name]" instead of "http://xmlns.com/foaf/0.1/name") in the RDF::JSON::Reader class.

When I try to load a json file from an nyt example (http://data.nytimes.com/home/about.html), I get:

   NoMethodError: undefined method `has_key?' for "2009-10-25":String
    from /Library/Ruby/Gems/1.8/gems/rdf-json-0.1.0/lib/rdf/json/reader.rb:89:in `parse_object'
    from /Library/Ruby/Gems/1.8/gems/rdf-json-0.1.0/lib/rdf/json/reader.rb:51:in `initialize'
    from /Library/Ruby/Gems/1.8/gems/rdf-json-0.1.0/lib/rdf/json/reader.rb:50:in `each'

It seems that this gem is expecting a hash when iterating over array elements.
I've verified the same error occurs on any of the nyt json files i.e. http://data.nytimes.com/home/a.html

To reproduce this error, use ruby 1.8.6 and this code:
require 'rdf'
require 'rdf/json'
RDF::Graph.load "http://data.nytimes.com/60694995023816375851.json"

I'm new to rdf so feel free to correct me if the error is on nyt's side.

Thanks,
Gabriel

These specs should pass :

require 'rdf/json'

describe 'Extensions' do

  it 'should serialize/unserialize a repository' do  
    repo = RDF::Repository.new
    repo << RDF::Statement.new(RDF::URI('http://www.dsfs.com#pp'), RDF::DC.pop, RDF::Literal.new(42, :datatype => RDF::XSD.newtype))
    str = repo.to_json
    str.should be_an_instance_of(String)    
    JSON.parse(str).should be_an_instance_of(RDF::Repository)
  end

  it 'should serialize/unserialize a graph' do  
    repo = RDF::Graph.new
    repo << RDF::Statement.new(RDF::URI('http://www.dsfs.com#pp'), RDF::DC.pop, RDF::Literal.new(42, :datatype => RDF::XSD.newtype))
    str = repo.to_json
    str.should be_an_instance_of(String)    
    JSON.parse(str).should be_an_instance_of(RDF::Graph)
  end

end