Get all the buckets for a aggregate elastic search - elasticsearch

Question

I want to get all the buckets available for a particular aggregate. Is there any query or endpoint to get the buckets?
Below is my Mapping. If I query with any filter then the related buckets are coming up, but I want all the buckets to show it on the frontend to have or operations.
Example: If we have 2 records, one is with category as chair and the other is in the table. If I select a chair it is returning table count is zero but it should show as table count as 1. So user can select both.
MyMapping:
{
"properties": {
"australiasellable": {
"type": "boolean"
},
"avgRating": {
"type": "float"
},
"categories": {
"type": "nested"
},
"category": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
},
"categorycode": {
"type": "text",
"fielddata": true
},
"categoryname": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
},
"colour": {
"type": "text",
"fielddata": true
},
"commercialuse": {
"type": "boolean"
},
"customisable": {
"type": "boolean"
},
"depth": {
"type": "float"
},
"freedelivery": {
"type": "boolean"
},
"height": {
"type": "float"
},
"listprice": {
"type": "float"
},
"location": {
"type": "geo_point"
},
"material": {
"type": "text",
"fielddata": true
},
"materialcode": {
"type": "text",
"fielddata": true
},
"message": {
"type": "geo_point"
},
"numberOfRating": {
"type": "long"
},
"online": {
"type": "boolean"
},
"outdooruse": {
"type": "boolean"
},
"productid": {
"type": "long"
},
"productimageurl": {
"type": "text",
"fielddata": true
},
"productname": {
"type": "text",
"fielddata": true
},
"producttypecode": {
"type": "text",
"fielddata": true
},
"sellercode": {
"type": "text",
"fielddata": true
},
"sellerdescription": {
"type": "text",
"fielddata": true
},
"shortdescription": {
"type": "text",
"fielddata": true
},
"sku": {
"type": "text",
"fielddata": true
},
"state": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
},
"stylecode": {
"type": "text",
"fielddata": true
},
"warrantycode": {
"type": "text",
"fielddata": true
},
"weight": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
},
"width": {
"type": "float"
}
}
}
Regards,
Sreenivas

Answer 1

A possible solution would be not to set the filter in the query section of your payload but rather perform filtered aggregations and use the top_hits to get the _sources of the matched docs.
Long story short, if you apply a query, it'll of course affect your aggregations. So the trick is to not apply any query (either match_all or remove the whole query object) and perform the queries in the sub-aggregations as follows:
Using your category field:
GET your_index/_search
{
"size": 0,
"query": {
"match_all": {}
},
"aggs": {
"actual_query_agg": {
"filter": {
"term": {
"category.keyword": {
"value": "chair"
}
}
},
"aggs": {
"actual_query_agg_top_hits": {
"top_hits": {
"_source": [
"category"
],
"size": 10
}
}
}
},
"excluding_my_query_filtered_agg": {
"filter": {
"bool": {
"must_not": {
"term": {
"category.keyword": "chair"
}
}
}
},
"aggs": {
"by_other_categories_agg": {
"terms": {
"field": "category.keyword",
"size": 10
},
"aggs": {
"categorized_other_docs_agg_top_hits": {
"top_hits": {
"_source": [
"category"
],
"size": 10
}
}
}
}
}
}
}
}
You can get rid of the top_hits sub-aggregations if you're just interested in the counts and not the underlying docs, i.e.:
GET your_index/_search
{
"size": 0,
"query": {
"match_all": {}
},
"aggs": {
"actual_query_agg": {
"filter": {
"term": {
"category.keyword": {
"value": "chair"
}
}
}
},
"excluding_my_query_filtered_agg": {
"filter": {
"bool": {
"must_not": {
"term": {
"category.keyword": "chair"
}
}
}
},
"aggs": {
"by_other_categories_agg": {
"terms": {
"field": "category.keyword",
"size": 10
}
}
}
}
}
}