how to use Reality Gem to query wikidata to find properties such as part_of & Instance_of

Question

I'm using Reality Gem to Query Wikidata, using this code below. But it gives nil output. i've checked using result.methods command but i dont't see any method to view "part_of" or "instance_of" property values

require 'reality'    
result = Reality::Entity("Enterprise JavaBeans")
result.part_of
=> nil

However on wikidata page these properties are available:

https://www.wikidata.org/wiki/Q742961

Can someone help me please?

I am actually trying to do this result.part_of , but i can't find any way of doing it — Zubair Ahmed, Jul 27 '17 at 16:06
I got it using a very ugly hacky... `w = Wikidata::Entity.one_by_id('Q742961'); e = Reality::Entity::WikidataPredicates.parse(w); e[:part_of]` — Lucas Costa, Jul 27 '17 at 17:09
did you type this "Wikidata::Entity" by mistake or you actually used another gem "wikidata" ? — Zubair Ahmed, Jul 27 '17 at 17:29
Ohh.. I'm sorry. Please use the following: `w = Reality::Wikidata::Entity.one_by_id('Q742961')` — Lucas Costa, Jul 27 '17 at 17:31
i can confirm that this works. If you like to post an answer, please go ahead. — Zubair Ahmed, Jul 27 '17 at 17:56

score 1 · Accepted Answer · answered Jul 27 '17 at 18:05

I don't know why this error is happening.
I guess it's because the document structures on Wikidata and Wikipedia aren't the same.

But you can get around with the following hacky:

require 'reality'

w = Reality::Wikidata::Entity.one_by_id('Q742961')
e = Reality::Entity::WikidataPredicates.parse(w)
e[:part_of]

how to use Reality Gem to query wikidata to find properties such as part_of & Instance_of

1 Answers1