How to escape hyphen character in Python elasticsearch

Question

I'm using the basic elasticsearch library in python 3.

I have a query:

query = {
        "query": {
            "bool": {
                "must": [{ "term": {"hostname": '"hal-pc"' } }]
            }
        }
    }

That I call with: page = es.search(index = index_name, body=query, search_type='scan', scroll='2m')

However I'm not getting any results. I can query on other fields so I know my query works, but when I add the search for a field with a hyphen in the value, I cannot find anything. How can I escape this character? I know that with normal ES queries you can send a message to configure your ES to respond to certain characters in certain ways, but I don't know how to do that in python.

I don't know what that means - I don't maintain the ES. I have access to a kibana, and it appears as a text field, if that helps. — Hal T
– Hal T, Commented Feb 14, 2017 at 16:33

Karthick Vinod · Accepted Answer · 2017-02-14 16:45:49Z

1

If the field hostname is analyzed in mapping, elasticsearch does not store the field value as is. Instead, it stores "hal-pc" as two separate terms: "hal" and "pc".So, the doc might not be obtained when search for "hal-pc" using term filter.

You can search for "hal-pc" using Match query to get the necessary result. Or, by making the field hostname field not-analyzed and using term query as is.

{
    "query": {
        "match" : {
            "hostname": "hal-pc"
        }
    }
}

But, this might also return docs where hostname is just "hal" or just "pc" as well.

edited Feb 14, 2017 at 16:45

answered Feb 14, 2017 at 16:41

Karthick Vinod

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3 Comments

Hal T Over a year ago

I'm not familiar enough with ES to understand your answer. Can you provide a sample Match query as am example? And how I would make the field not analyzed?

Hal T Over a year ago

Thanks for the edit. If I have several hostnames like "hal-pc", "abc-pc", "foo-pc", this will only give me "hal-pc" right? and I can combine this with other bool queries by having {"query":{"bool":{stuff},"match":{stuff in your post}}} right?

Karthick Vinod Over a year ago

Check this out : elastic.co/guide/en/elasticsearch/guide/current/…

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