ElasticSearch doesn't seem to support array lookups - elasticsearch

Question

I currently have a fairly simple document stored in ElasticSearch that I generated with an integration test:
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"failed" : 0
},
"hits" : {
"total" : 1,
"max_score" : 1.0,
"hits" : [ {
"_index" : "unit-test_project600",
"_type" : "recordDefinition505",
"_id" : "400",
"_score" : 1.0, "_source" : {
"field900": "test string",
"field901": "500",
"field902": "2050-01-01T00:00:00",
"field903": [
"Open"
]
}
} ]
}
}
I would like to filter for specifically field903 and a value of "Open", so I perform the following query:
{
query: {
filtered: {
filter: {
term: {
field903: "Open",
}
}
}
}
}
This returns no results. However, I can use this with other fields and it will return the record:
{
query: {
filtered: {
filter: {
term: {
field901: "500",
}
}
}
}
}
It would appear that I'm unable to search in arrays with ElasticSearch. I have read a few instances of people with a similar problem, but none of them appear to have solved it. Surely this isn't a limitation of ElasticSearch?
I thought that it might be a mapping problem. Here's my mapping:
{
"unit-test_project600" : {
"recordDefinition505" : {
"properties" : {
"field900" : {
"type" : "string"
},
"field901" : {
"type" : "string"
},
"field902" : {
"type" : "date",
"format" : "dateOptionalTime"
},
"field903" : {
"type" : "string"
}
}
}
}
}
However, the ElasticSearch docs indicate that there is no difference between a string or an array mapping, so I don't think I need to make any changes here.

Answer 1

Try searching for "open" rather than "Open." By default, Elasticsearch uses a standard analyzer when indexing fields. The standard analyzer uses a lowercase filter, as described in the example here. From my experience, Elasticsearch does search arrays.