Object keys

[laggingreflex]

Similar to #37, wondering again if object keys could work as well. E.g.:

const lucene = require('lucene-filter')(require('lucene'));
const data = [
  { name: 'C-3PO'           , species: 'Droid', deep: {level: 'foo'} },
  { name: 'R2-D2'           , species: 'Droid', deep: {level: 'bar'} },
  { name: 'Anakin Skywalker', species: 'Human', deep: {level: 'bar'} },
  { name: 'Obi-Wan Kenobi'  , species: 'Human', deep: {level: 'bar'} },
  { name: 'Moon Moon'       , species: 'Wolf' , deep: {level: 'bar'} },
];

console.log(data.filter(lucene('deep.level: foo')));

Expected:

[{ name: 'C-3PO'           , species: 'Droid', deep: {level: 'foo'} }]

[finwo]

The specification on this was a bit vague, but as you've written is approximately how solr handles the deep value filters.

There's no path traversal as of yet in the project, but it might be worth building that soon (soonest would be next weekend).

[paulcanning]

Possibly make use of https://www.npmjs.com/package/object-resolve-path for an easy way to handle this