Elasticsearch: query produced is invalid - elasticsearch

Question

I'm getting a little frustrated with elasticsearch, after having read the documents, but can't seem to get beyond a 'The query produced is invalid" response. What I am trying to do is use elasticsearch to find imperfect duplicates in geospatial information and a rather large dataset. I want to match on name (boosted) and address, filter results a small geographic box and then reduce the relevance score of matches that are located further from my reference point. Can someone please help? I think I understnad the individual elements of a query, my main problem is putting these together in a way that products something valid.
$query = new \Elastica\Query\Builder('{
"function_score": {
"functions": [
{
"gauss": {
"location": {
"origin": "'.$latitude.', '.$longitude.'",
"scale": "2km"
}
}
}
],
"query": {
"filtered": {
"query": {
"bool": {
"should": [
{
"match": {
"name": {
"query": "'.$name.'",
"boost": 4
}
}
},
{
"match": {
"address": {
"query": "'.$address.'",
"boost": 1
}
}
}
]
}
},
"filter": {
"geo_distance": {
"distance": "2km",
"location": {
"lat": "'.$latitude.'",
"lon": "'.$longitude.'"
}
}
}
}
}
}')

Answer 1

You should surround the whole query by a "query" clause:
$query = new \Elastica\Query\Builder('{
"query": {
"function_score": {
"functions": [
{
"gauss": {
"location": {
"origin": "'.$latitude.', '.$longitude.'",
"scale": "2km"
}
}
}
],
"query": {
"filtered": {
"query": {
"bool": {
"should": [
{
"match": {
"name": {
"query": "'.$name.'",
"boost": 4
}
}
},
{
"match": {
"address": {
"query": "'.$address.'",
"boost": 1
}
}
}
]
}
},
"filter": {
"geo_distance": {
"distance": "2km",
"location": {
"lat": "'.$latitude.'",
"lon": "'.$longitude.'"
}
}
}
}
}
}
}')
To have more feedback when making queries, a good habit is to print the Elasticsearch's response to the query.
Try the query in your SENSE:
POST test/_search
{
"function_score": {
"functions": [
{
"gauss": {
"location": {
"origin": "11, 12",
"scale": "2km"
}
}
}
],
"query": {
"filtered": {
"query": {
"bool": {
"should": [
{
"match": {
"name": {
"query": "name",
"boost": 4
}
}
},
{
"match": {
"address": {
"query": "address",
"boost": 1
}
}
}
]
}
},
"filter": {
"geo_distance": {
"distance": "2km",
"location": {
"lat": "'.$latitude.'",
"lon": "'.$longitude.'"
}
}
}
}
}
}
}
You'll get the response:
SearchParseException[[test][4]: from[-1],size[-1]: Parse Failure [No parser for element [function_score]]]; }]
Telling that Elasticsearch doesn't recognize "function_score". By reading in detail the function_score page on the elasticsearch wiki and looking at the example, you'll then find what's missing: the surrounding "query" clause.
PS: Elastica also provides an alternative syntax for creating the query body with the ElasticaQueryBuilder, which spare you from writing the json.