es_query.rb

aggregations(manufacturers: {
  terms: {
    field: 'manufacturer.raw'
  }
}, merchants: {
  terms: {
    field: 'merchant.raw'
  }
}, categories: {
  terms: {
    field: 'category.raw'
  }
}).suggest(didyoumean: {
  text: options[:query],
  phrase: {
    size: 1,
    max_errors: 0.5,
    field: 'did_you_mean'
  }
}).query(
  bool: {
    should: [{
      multi_match: {
          query: options[:query],
          fields: [
            "offer_description",
            "offer_title^3",
            "manufacturer^0.5",
            "category^2",
            "sub_category^2"
          ],
          minimum_should_match: '75%'
        }
      }, {
        multi_match: {
          query: options[:query],
          fields: [
            :category,
            :sub_category
          ],
          minimum_should_match: '80%'
        }
    }]
  }
).min_score(0.5)