ElasticSearch- How to limit size of the each combined query? - json

Question

Here is my Mapping
{
"state":"open",
"settings":{
"index":{
"creation_date":"1453816191454",
"number_of_shards":"5",
"number_of_replicas":"1",
"version":{
"created":"1070199"
},
"uuid":"TfMJ4M0wQDedYSQuBz5BjQ"
}
},
"mappings":{
"Product":{
"properties":{
"index":"not_analyzed",
"store":true,
"type":"string"
},
"ProductName":{
"type":"nested",
"properties":{
"Name":{
"store":true,
"type":"string"
}
}
},
"ProductCode":{
"type":"string"
},
"Number":{
"index":"not_analyzed",
"store":true,
"type":"string"
},
"id":{
"index":"no",
"store":true,
"type":"integer"
},
"ShortDescription":{
"store":true,
"type":"string"
},
"Printer":{
"_routing":{
"required":true
},
"_parent":{
"type":"Product"
},
"properties":{
"properties":{
"RelativeUrl":{
"index":"no",
"store":true,
"type":"string"
}
}
},
"PrinterId":{
"index":"no",
"store":true,
"type":"integer"
},
"Name":{
"store":true,
"type":"string"
}
}
},
"aliases":[]
}
}
I would like to query mainly Products and if there products have 20 results, then return 20 products but if Products dont have any matching return printers+products having matching printers(childs)
When I execute this query, for key=tn-200, it returns 20 products and for key=hl-2230 returns me only printers. It works as expected. because hl-2230 doesnt have any products matching.
{
"query": {
"bool": {
"should": [{
"query_string": {
"default_field": "_all",
"query": "key"
}
}],
"must_not": [],
"must": []
}
},
"from": 0,
"size": 20,
"sort": [],
"aggs": {}
}
when I execute this query for hl-2230, it will return me products of matching hl-2230 printer. Also works as expected.
{
"query": {
"has_child": {
"type": "Printer",
"query": {
"match": {
"Name": "HL-2230"
}
}
}
},
"from": 0,
"size": 20,
"sort": [],
"aggs": {}
}
Now my questions is how to combine those? I tried to use combined bool query with limit but when I search hl-2230, it only returns products and never returns any printers. As if "should" part is inactive and only must part is executed. because If I set "value" : 1 for the must query, I get 5 results (5 shards), "value" : 2, I get 10 results.
I am not sure if the limit query is the way to go also? Please advise me.
thanks.
{
"query": {
"bool": {
"should": [{
"filtered" : {
"filter" : {
"limit" : {
"value" : 20
}
},
"query": {
"multi_match": {
"type": "best_fields",
"query": "hl-2230",
"fields": [
"ManufactureNumber^5",
"Number^4",
"Name^3"
]
}
}
}
}],
"must": [{
"filtered" : {
"filter" : {
"limit" : {
"value" : 1
}
},
"query": {
"has_child": {
"type": "Printer",
"query": {
"match": {
"Name": "HL-2230"
}
}
}
}
}
}]
}
},
"from": 0,
"size": 20,
"sort": [],
"aggs": {}
}

Answer 1

PLease try this:
{
"query": {
"bool": {
"should": [
{
"multi_match": {
"type": "best_fields",
"query": "hl-2230",
"fields": [
"ManufactureNumber^5",
"Number^4",
"Name^3"
]
}
},
{
"has_child": {
"type": "Printer",
"query": {
"match": {
"Name": "HL-2230"
}
}
}
}
]
}
},
"size": 20,
"sort": [],
"aggs": {}
}
Hope this helps.