Multi GET and sort

Elastic Stack Elasticsearch
1

Hello,

I want to retrieve a list of documents of the same type based on document IDs - Multi GET API works great.

Now, I would like to sort the documents based on a specific field of that type.
Is it possible to sort the list using MGET API on ES side? Or, do I need to sort it on the client side?

I'm using Java High Level REST Client.

Thank you.

2

Hi ,

You can do below :

endpoint:
http://localhost:9200/index_name/_docType/_search

query :

{  
   "size":100,
   "timeout":"500ms",
   "query":{  
    "match_all":{}
   },
   "sort":[  
      {  
         "fieldname":{  
            "order":"desc"
         }
      }
   ]
}

fieldname : is the name of the field you want to perform sorting on .
size : number of documents you want to fetch in results .

In the query section you can have different combination of queries for simplicity i've put match_all , it will fetch all documents .

3

Thanks for reply. I'm not sure if I can use this when I have a list of document IDs on the input.

Let me rephrase my question. I would like to retrieve a list of documents (of the same type) when I have a list of document IDs. And, the result list would be sorted by some field.

I know I can retrieve the list using MGET. But I do not know how to sort it (on ES).

4

Instead of a multiget, you can use the ids query. That query can be combined with a sort clause to sort the documents however you want those to be sorted.

5

Understand. Thank you!