Term filters / exact match


(Ian Eure) #1

I'm having some difficulties getting term filters to work properly. I poked around the mailing lists, and from what I can see, I'm doing the right thing, but it isn't working.

What I want to do is filter a query where a field exactly matches a string.

I have a mapping (bits elided):

{
"geojson": {
"properties": {
"properties": {
"type": "object",
"dynamic": "true",
"properties": {
"categories": {
"type": "string",
"index": "not_analyzed"}}}}}}

And I have a document, also with bits elided:

{'properties': {'categories': ['Food & Beverage', 'Restaurants', 'Mexican']}}}

My query looks like this:

{"query": {"filtered": {"filter": {"term": {"properties.categories": "Mexican"}}, "query": {"match_all": {}}}}}

This matches nothing. If I lower-case "Mexican," it matches my document. If I change the term filter to "Food & Beverage", it also matches nothing, and changing the case as with the single-word filter also matches nothing.

As I understand from reading the docs & ML:

  1. Term query/filter shouldn't analyze the searched/filtered value[1].
  2. Fields with index not_analyzed are stored unchanged[2].

But this doesn't seem to be the case. Perhaps also of interest, when I fetch my mapping from ES, I get this:

"categories" : {
"type" : "string"
}

No mention of index being analyzed or not_analyzed. Even though the examples have it set up the same way I have, maybe that isn't working? I'm using ElasticSearch 0.17.1

[1]: http://elasticsearch-users.115913.n3.nabble.com/Beginners-Query-Questions-tp2413095p2413372.html & http://www.elasticsearch.org/guide/reference/query-dsl/term-query.html
[2]: http://www.elasticsearch.org/guide/reference/index-modules/analysis/keyword-analyzer.html


(Shay Banon) #2

I think you had something indexing into it before setting the mapping for
the object. This works: https://gist.github.com/1108666 (do get mapping
afterwards, you will see that categories are not analyzed).

On Wed, Jul 27, 2011 at 3:31 AM, Ian Eure ian@simplegeo.com wrote:

I'm having some difficulties getting term filters to work properly. I poked
around the mailing lists, and from what I can see, I'm doing the right
thing, but it isn't working.

What I want to do is filter a query where a field exactly matches a string.

I have a mapping (bits elided):

{
"geojson": {
"properties": {
"properties": {
"type": "object",
"dynamic": "true",
"properties": {
"categories": {
"type": "string",
"index": "not_analyzed"}}}}}}

And I have a document, also with bits elided:

{'properties': {'categories': ['Food & Beverage', 'Restaurants',
'Mexican']}}}

My query looks like this:

{"query": {"filtered": {"filter": {"term": {"properties.categories":
"Mexican"}}, "query": {"match_all": {}}}}}

This matches nothing. If I lower-case "Mexican," it matches my document. If
I change the term filter to "Food & Beverage", it also matches nothing, and
changing the case as with the single-word filter also matches nothing.

As I understand from reading the docs & ML:

  1. Term query/filter shouldn't analyze the searched/filtered value1.
  2. Fields with index not_analyzed are stored unchanged[2].

But this doesn't seem to be the case. Perhaps also of interest, when I
fetch my mapping from ES, I get this:

"categories" : {
"type" : "string"
}

No mention of index being analyzed or not_analyzed. Even though the
examples have it set up the same way I have, maybe that isn't working? I'm
using ElasticSearch 0.17.1

http://www.elasticsearch.org/guide/reference/query-dsl/term-query.html
[2]:
http://www.elasticsearch.org/guide/reference/index-modules/analysis/keyword-analyzer.html


(system) #3