tests with mongodb full text search and mongoose

mongodb_fulltext_search.coffee

mongoose = require 'mongoose'
Schema = mongoose.Schema
Q = require 'q-extended'

Q.genrun ->
  
  url = "mongodb://localhost/test"
  yield Q.ninvoke(mongoose, "connect", url)
  
  NoSchema = new Schema({}, { strict: false })
  NoSchema.index({ key: 'text'});
  
  Test = mongoose.model('Test', NoSchema)
  yield Test.collection.dropAllIndexes();
  yield Test.ensureIndexes()
  
  yield Test.remove({})
  yield Test.create({ key: "dog" })
  yield Test.create({ key: "dog cat" })
  yield Test.create({ key: "dog cat cat" })
  yield Test.create({ key: "dog cats cat" })
  
  
  # Test 1
  
  console.log 'Searching for: "cat"'
  
  result = yield Test.find(
    $text:
      $search: "cat"
  ,
    $score:
      $meta: 'textScore'
    _id: 0
    __v: 0
  ).exec()
  
  console.log result
  
  # Notes
  
  # 1. The score is higher when the word matches multiple times
  # 2. There is no difference with singular/plural
  
  # We could avoid 1. by de-duplicating terms but we don't have powerful
  # singular/plural equivalence lookup as mongodb has
  
  
  # Test 2
  
  console.log 'Searching for: "dog"'
  
  result = yield Test.find(
    $text:
      $search: "dog"
  ,
    $score:
      $meta: 'textScore'
    _id: 0
    __v: 0
  ).exec()
  
  console.log result
  
  # Notes
  
  # The score is higher if there are few 'extraneous' words
  
  # It looks like we can't avoid this
  
  
  yield mongoose.disconnect()
  

.catch (e) -> console.error e, e.stack.split('\n')