June 2017
Beginner to intermediate
404 pages
8h 22m
English
Content preview from Learning Elasticsearch
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Nested
As we discussed in the previous section, when we have an array of objects, the array is flattened due to which the object relations don't exist anymore. To solve this, Elasticsearch provides nested datatype. When you use nested datatype, each object in the array is indexed as a new document internally. Since the objects are handled internally as separate documents, you have to use a special type of query to query nested documents. We will discuss nested queries and sorting in the Handling document relations using nested section of Chapter 7, More than a search engine.
The mapping for the address field can be set as nested, as shown next:
{ "properties": { "id": { "type": "integer" }, "name": { "type": "keyword" }, "address_nested": ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.