Elasticsearch Range filter with year only - php

Question

I need to filter my data with year only using elastic search. I am using PHP to fetch and show the results. Here is my JSON Format data
{ loc_cityname: "New York",
location_countryname: "US",
location_primary: "North America"
admitted_date : "1994-12-10"
},
{ loc_cityname: "New York",
location_countryname: "US",
location_primary: "North America"
admitted_date : "1995-12-10"
},
I am using below codes to filter the values by year.
$options='{
"query": {
"range" : {
"admitted_date" : {
"gte" : 1994,
"lte" : 2000
}
}
},
"aggs" : {
"citycount" : {
"cardinality" : {
"field" : "loc_cityname",
"precision_threshold": 100
}
}
}
}';
How can i filter the results with year only. Please somebody help me to fix this.
Thanks in advance,

Answer 1

You simply need to add the format parameter to your range query like this:
$options='{
"query": {
"range" : {
"admitted_date" : {
"gte" : 1994,
"lte" : 2000,
"format": "yyyy" <--- add this line
}
}
},
"aggs" : {
"citycount" : {
"cardinality" : {
"field" : "loc_cityname",
"precision_threshold": 100
}
}
}
}';
UPDATE
Note that the above solution only works for ES 1.5 and above. With previous versions of ES, you could use a script filter instead:
$options='{
"query": {
"filtered": {
"filter": {
"script": {
"script": "(min..max).contains(doc.admitted_date.date.year)",
"params": {
"min": 1994,
"max": 2000
}
}
}
}
},
"aggs": {
"citycount": {
"cardinality": {
"field": "loc_cityname",
"precision_threshold": 100
}
}
}
}';
In order to be able to run this script filter, you need to make sure that you have enabled scripting in elasticsearch.yml:
script.disable_dynamic: false