# Nested field\_value\_factor on individual field

**URL:** <https://discuss.elastic.co/t/nested-field-value-factor-on-individual-field/64182>\
**Category:** Elasticsearch\
**Created:** [October 27, 2016, 6:40pm UTC](https://discuss.elastic.co/t/nested-field-value-factor-on-individual-field/64182 "2016-10-27T18:40:49Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![bunch\_of\_bytes](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bunch_of_bytes/32/12771_2.png) [@bunch\_of\_bytes](https://discuss.elastic.co/u/bunch_of_bytes)\
**Post date:** [October 27, 2016, 6:40pm UTC](https://discuss.elastic.co/t/nested-field-value-factor-on-individual-field/64182/1 "2016-10-27T18:40:49Z")

</div>

I have some document with mapping looks like following:

```
    {  
   "documents":[  
      {  
         "author":"name1",
         "books":[  
            {  
               "title":"title1",
               "content":"content1",
               "rating":5
            },
            {  
               "title":"title2",
               "content":"content2",
               "rating":1
            }
         ]
      },
      {  
         "author":"name2",
         "books":[  
            {  
               "title":"title1",
               "content":"content1",
               "rating":3
            },
            {  
               "title":"title2",
               "content":"content2",
               "rating":3
            }
         ]
      }
   ]
}

```

I want to return a list of authors whose book contents match certain keywords. But at the same time, I want the score on each documents.books.content is boosted by documents.books.rating, then combine these score together.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 10:09pm UTC](https://discuss.elastic.co/t/nested-field-value-factor-on-individual-field/64182/2 "2017-07-05T22:09:01Z")

</div>