Field null_value doesn't seem to have any effect?

Elastic Stack Elasticsearch
1

Hello,

I've configured the null_value of a field, as below. But when I do a query,
the documents that lack a barfield, don't return the value "0" for the
'barfield' as expected. What could be the reason?

"foo": {
    "properties": {
        "barfield": {
            "type": "long",
            "store" : true,
            "null_value" : 0
        },
}

Regards,

AS.

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2

The null_value is not used as a "default value", but as a value to used
when doing searching or aggregations.

For instance, in your mapping, your document will match if you have a
filter like this: ['term' => ['barfield' => 0]], however it won't return
the barfield property if it is null.

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3

Ah, that explains it. Thx. How can I configure / simulate a default_value
for this field?

/AS

On Friday, February 6, 2015 at 4:41:01 PM UTC+1, Michaël Gallego wrote:

The null_value is not used as a "default value", but as a value to used
when doing searching or aggregations.

For instance, in your mapping, your document will match if you have a
filter like this: ['term' => ['barfield' => 0]], however it won't return
the barfield property if it is null.

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4

Just adding to the previous answer that elasticsearch does not modify the _source doc.

--
David :wink:
Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs

Le 6 févr. 2015 à 16:32, AS *@equanimity.nl a écrit :

Hello,

I've configured the null_value of a field, as below. But when I do a query, the documents that lack a barfield, don't return the value "0" for the 'barfield' as expected. What could be the reason?

"foo": {
    "properties": {
        "barfield": {
            "type": "long",
            "store" : true,
            "null_value" : 0
        },
}

Regards,

AS.

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