Are hashes/objects saved in order?

Elastic Stack Elasticsearch
1

if I insert this field in this order:
"name_of_field": {"first":1,"second":2,"third":3}

will it always save in the same order as I inserted ?

Based on my test, inserting multiple objects like that can make it save it different order, like:

"name_of_field": {"third":3,"first":1,"second":2}

2

Elasticsearch does not change the document but JSON serialisation and deserialisation does generally not guarantee that order is preserved.

3

Is there any way I could enforce an order on a particular hash field ?

4

To do so you would need to control how your documents are serialised and deserialised which means e.g. not using scripted updates. Which client(s) are you using?

5

Ruby Elasticsearch gem: https://github.com/elastic/elasticsearch-ruby

Do you want me to send the update query here ?

6

I will update recommended not relying on the order as it will be more resilient given that ordering is generally not guaranteed.

7

Alright then,
so the best will probably be to put it under an array, like:

"name_of_field": [{"first":1},{"second":2},{"third":3}]

8

That sounds like a bad idea. Why do you feel you need to preserve order??

9

This object will be sent through an API that will send to the browser and it needs to be displayed in a certain order

10

any suggestion on a better way to deal with this ?

11

Sort it in the browser?

12

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