Problem with highlighting in has_child query

Elastic Stack Elasticsearch
1

I am unable to get highlighting results when querying a field of type
attachment in a child document using the has_child query. However I
am able to get the highlighting results if I query directly against
the child document.

Is this supported, or am I doing something wrong?

The child document is of type "contentFiles" with a field called
"file" of type attachment (for pdf file processed by the mapper-
attachments). This query successfully returns highlight elements:

curl -XGET 'http://localhost:9201/foo_acme/contentFiles/_search' -d
'{"query":{"field":{"file" : "Account"}},"highlight":{"fields":
{"file": {}}}}'

However when I try to query via the parent type "content" using a
has_child query, I get the search results but I don't get the
highlight elements:

curl -XGET 'http://localhost:9201/foo_acme/content/_search' -d
'{"query": {"has_child":{"type":"contentFiles", "query":{"field":
{"file" : "Account"}},"highlight":{"fields":{"file":{}}}}}}'

I'm using elasticsearch version 0.16.2.

For completeness, here is my mapping for the contentFiles type, but I
think the mapping is ok, since my first query works:
{
"contentFiles": {
"_source" : {
"enabled" : false
},
"_parent": {
"type" : "content"
},
"properties" : {
"file" : {
"type" : "attachment",
"fields" : {
"file" : {"store" : "yes",
"term_vector" : "with_positions_offsets"}
}
}
}
}
}

Thanks!
Lar

2

You can't do highlighting on the content of a child document when using has_child query, that idea for that is to just match and return the parent docs, and those will be the ones that will be highlighted... .

On Wednesday, June 15, 2011 at 11:00 PM, lmader wrote:

I am unable to get highlighting results when querying a field of type
attachment in a child document using the has_child query. However I
am able to get the highlighting results if I query directly against
the child document.

Is this supported, or am I doing something wrong?

The child document is of type "contentFiles" with a field called
"file" of type attachment (for pdf file processed by the mapper-
attachments). This query successfully returns highlight elements:

curl -XGET 'http://localhost:9201/foo_acme/contentFiles/_search' -d
'{"query":{"field":{"file" : "Account"}},"highlight":{"fields":
{"file": {}}}}'

However when I try to query via the parent type "content" using a
has_child query, I get the search results but I don't get the
highlight elements:

curl -XGET 'http://localhost:9201/foo_acme/content/_search' -d
'{"query": {"has_child":{"type":"contentFiles", "query":{"field":
{"file" : "Account"}},"highlight":{"fields":{"file":{}}}}}}'

I'm using elasticsearch version 0.16.2.

For completeness, here is my mapping for the contentFiles type, but I
think the mapping is ok, since my first query works:
{
"contentFiles": {
"_source" : {
"enabled" : false
},
"_parent": {
"type" : "content"
},
"properties" : {
"file" : {
"type" : "attachment",
"fields" : {
"file" : {"store" : "yes",
"term_vector" : "with_positions_offsets"}
}
}
}
}
}

Thanks!
Lar

3

Ok, thank you for the info!

Is this a feature that could be supported in the future? We have a
monstrous query that goes against the parent and child docs, and it
would be very convenient if it could do the highlighting in the
has_child part as well.

Cheers,
Lar

4

Good question... . Nothing planned, mainly since implementation wise its quite heavy to do it (if implemented). Need to spend some time thinking about it properly.

On Friday, June 17, 2011 at 2:43 AM, lmader wrote:

Ok, thank you for the info!

Is this a feature that could be supported in the future? We have a
monstrous query that goes against the parent and child docs, and it
would be very convenient if it could do the highlighting in the
has_child part as well.

Cheers,
Lar

5

Hi. Has this been implemented or is there any workaround? As my documents and subdocuments are really big, I'd really like to avoid nested objects/queries.

Thanks!