Hi all, could you help me with little problem regarding language-specific
analyzers and highliting in elasticsearch?
I need search documents by a query string and highlight matched strings.
Here is my mapping:
{
"usr": {
"properties": {
"text0": {
"type": "string",
"analyzer": "english"
},
"text1": {
"type": "string"
}
}
}
}
Note, that for "text0" field "english" analyzer is set, and for "text1"
field is used standard analyzer by default.
In my index there is one document for now:
hits": [{
"_index": "tt",
"_type": "usr",
"_id": "AUxvIPAv84ayQMZV-3Ll",
"_score": 1,
"_source": {
"text0": "highlighted. need to be highlighted.",
"text1": "highlighted. need to be highlighted."
}
}]
Consider following query:
{
"query": {
"query_string" : {
"query" : "highlighted"
}
},
"highlight" : {
"fields" : {
"*" : {}
}
}
}
I've expected each field in the document to be highlighted, but
highlighting appeared only in "text1" field (where is no analyzer set):
"hits": [{
"_type": "usr",
"_source": {
"text0": "highlighted. need to be highlighted.",
"text1": "highlighted. need to be highlighted."
},
"_score": 0.19178301,
"_index": "tt",
"highlight": {
"text1": [
"highlighted. need to be highlighted."
]
},
"_id": "AUxvIPAv84ayQMZV-3Ll"
}]
Let's consider the following query(I expected "highlighted" matches
"highlight" because of analyzer):
{
"query": {
"query_string" : {
"query" : "highlight"
}
},
"highlight" : {
"fields" : {
"*" : {}
}
}
}
But there was no hist in response at all: (Did the english analyzer even
work here?)
"hits": {
"hits": [],
"total": 0,
"max_score": null
}
At last, consider some curl commands (requests and responses):
curl "http://localhost:9200/tt/_analyze?field=text0" -d "highlighted"
{"tokens":[{
"token":"highlight",
"start_offset":0,
"end_offset":11,
"type":"",
"position":1
}]}
curl "http://localhost:9200/tt/_analyze?field=text1" -d "highlighted"
{"tokens":[{
"token":"highlighted",
"start_offset":0,
"end_offset":11,
"type":"",
"position":1
}]}
We see, by passing text through the english and standard analyzers, the
result is different.
Finally, the question:
does english analyzer prevent fields from highlighting? How can I get my
fields highlighted while full-text search?
P.S. I use elasticsearch v1.4.4 on my local machine with windows 8.1.
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