I want the count of each values of a variable based on some filter applied in elastic search. For example, I want all the age groups but on the filter that the students are from California.
The age groups is text field and contains an array like this,
"age_group": ["5-6-years", "6-7-years"]
I kinda want a query like this but this ain't working. It throws an error saying
unable to parse BaseAggregationBuilder with name [count]: parser not found
"student_aggregation": {
"nested": {
path": "students"
},
"aggs": {
"available": {
"filter": {
"term": { "students.place_of_birth": "California" }
},
"aggs" : {
"age_group" : { "count" : { "field" : "students.age_group" } }
}
}
}
}
Request help from you troops.
That's because there's no metric aggregation called count
but value_count
instead:
"student_aggregation": {
"nested": {
path": "students"
},
"aggs": {
"available": {
"filter": {
"term": { "students.gender": "boys" }
},
"aggs" : {
"age_group" : { "value_count" : { "field" : "students.age_group" } }
^^^
|||
}
}
}
}
UPDATE :
After discussions, the terms
aggregation was more appropriate than value_count
. After fixing the mapping (which was text
instead of keyword
), the query worked out correctly
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