I have following mapping:
PUT /test_products
{
"mappings": {
"_doc": {
"properties": {
"type": {
"type": "keyword"
},
"name": {
"type": "text"
},
"entity_id": {
"type": "integer"
},
"weighted": {
"type": "integer"
}
"product_relation": {
"type": "join",
"relations": {
"window": "simple"
}
}
}
}
}
}
I want to get "window" products with all "simple"s but only where one or more "simple"s have property "weighted" = 1
I wrote following query:
GET test_products/_search
{
"query": {
"has_child": {
"type": "simple",
"query": {
"term": {
"weighted": 1
}
},
"inner_hits": {}
}
}
}
But I've got "window"s with "simple"s which are match to the term. In other words I want to filter "window"s list by "simple"'s option and get all matched "window"s with all their "simple"s. Is it possible without "nested" in one query? Or I have to do some queries?
OK. Luckily, I need to get only one "window" product with all it's children by it's ID, so I found parent_id query which can helps me with this task.
Now I have following query:
GET test_products/_search
{
"query": {
"parent_id": {
"type": "simple",
"id": "window-1"
}
}
}
Unfortunately, I have to execute 2 queries (has_child and then parent_id) instead of one but it's OK for me.
Related
How can I define mapping in Elasticsearch 7 to index a document with a field value from another index? For example, if I have a users index which has a mapping for name, email and account_number but the account_number value is actually in another index called accounts in field number.
I've tried something like this without much success (I only see "name", "email" and "account_id" in the results):
PUT users/_mapping
{
"properties": {
"name": {
"type": "text"
},
"email": {
"type": "text"
},
"account_id": {
"type": "integer"
},
"accounts": {
"properties": {
"number": {
"type": "text"
}
}
}
}
}
The accounts index has the following mapping:
{
"properties": {
"name": {
"type": "text"
},
"number": {
"type": "text"
}
}
}
As I understand it, you want to implement field joining as is usually done in relational databases. In elasticsearch, this is possible only if the documents are in the same index. (Link to doc). But it seems to me that in your case you need to work differently, I think your Account object needs to be nested for User.
PUT /users/_mapping
{
"mappings": {
"properties": {
"account": {
"type": "nested"
}
}
}
}
You can further search as if it were a separate document.
GET /users/_search
{
"query": {
"nested": {
"path": "account",
"query": {
"bool": {
"must": [
{ "match": { "account.number": 1 } }
]
}
}
}
}
}
What I am trying to do is the query to elastic search (ver 6.4), to get the unique search result (named eids). I made a query as below. What I'd like to do is first text search from both 2 fields called eLabel and pLabel, and get the distinct result called eid. But actually the result is not aggregated, showing redundant ids from 0 to over 20. How I can adjust the query?
{
"query": {
"multi_match": {
"query": "Brazil Capital",
"fields": [
"eLabel",
"pLabel"
]
}
},
"size": 200,
"_source": [
"eid",
"eLabel"
],
"aggs": {
"eids": {
"terms": {
"field": "eid"
}
}
}
}
my current mappings are as follows.
eid : id of entity
eLabel: entity label (ex, Brazil)
prop_id: property id of the entity (eid)
pLabel: the label of the property (ex, is the capital of, is located at ...)
"mappings": {
"entity": {
"properties": {
"eLabel": {
"type": "text" ,
"index_options": "docs" ,
"analyzer": "my_analyzer"
} ,
"eid": {
"type": "keyword"
} ,
"subclass": {
"type": "boolean"
} ,
"pLabel": {
"type": "text" ,
"index_options": "docs" ,
"analyzer": "my_analyzer"
} ,
"prop_id": {
"type": "keyword"
} ,
"pType": {
"type": "keyword"
} ,
"way": {
"type": "keyword"
} ,
"chain": {
"type": "integer"
} ,
"siteKey": {
"type": "keyword"
},
"version": {
"type": "integer"
},
"docId": {
"type": "integer"
}
}
}
}
Based on your comment, you can make use of the below query using Bool. Don't think anything is wrong with aggregation query, just replace the query you have with the bool query I've mentioned and I think it would suffice.
When you make use of multi_match query, it would retrieve even if the document has eLabel = "Rio is capital of brazil" & pLabel = "something else entirely here"
POST <your_index_name>/_search
{
"query": {
"bool": {
"must": [
{
"match": {
"eLabel": "capital"
}
},
{
"match": {
"pLabel": "brazil"
}
}
]
}
},
"size": 200,
"_source": [
"eid",
"eLabel"
],
"aggs": {
"eids": {
"terms": {
"field": "eid"
}
}
}
}
Note that if you only want the values of eid and do not want the documents, you can set "size":0 in the above query. That way you'd only have aggregation results returned.
Let me know if this helps!!
I have the next mapping :
"c_index": {
"aliases": {},
"mappings": {
"an": {
"properties": {
"id": {
"type": "string"
},
"sm": {
"type": "nested",
"properties": {
"cr": {
"type": "nested",
"properties": {
"c": {
"type": "string"
},
"e": {
"type": "long"
},
"id": {
"type": "string"
},
"s": {
"type": "long"
}
}
},
"id": {
"type": "string"
}
}
}
}
}
}
And I need a query than gives me all the cr's when:
an.id == x and sm.id == y
I tried with :
{"query":{"bool":{"should":[{"terms": {"_id": ["x"]}},
{"nested":{"path": "sm","query":{
"match": {"sm.id":"y"}}}}]}}}
But runs very slow and gives more info than i need.
What's the most efficient way to do that ? Thank you!
You don't need nested query here. Also, use filter instead of should if you want to find documents matching all the queries (the exception would be if you wanted the query to affect the score, like match query, which is not the case here, then you could use should + minimum_should_match option)
{
"query": {
"bool": {
"filter": [
{ "term": { "_id": "x" } },
{ "term": { "sm.id": "y" } }
]
}
}
}
I have an index with two type (Parent/CHild relation) like this :
{
"myindex": {
"mappings": {
"b": {
"_parent": {
"type": "a"
},
"properties": {
"b_propertie1": {
"type": "string",
"analyzer": "keyword_analyzer"
},
"b_propertie2": {
"type": "string",
"analyzer": "keyword_analyzer"
}
}
},
"a": {
"properties": {
"a_propertie1": {
"type": "string",
"analyzer": "keyword_analyzer"
},
"a_propertie2": {
"type": "string",
"analyzer": "keyword_analyzer"
}
}
}
}
}
}
And i want to make a query that returns the fields of the parent and the child
POST /myindex/b/_search
{
"fields" : ["b_propertie1", "b_propertie2", "a_propertie1", "a_propertie2"],
"query": {
"match": {
"b_propertie1": "SOMETHING"
}
}
}
Is there any way to do it ? and how?
Thank you.
ElasticSearch cannot merge fields from parent and child documents.
What you can do is to use the has_child query, which returns you parent documents that have child documents that match your query. By specifying the inner_hits parameters you also get as inner objects the child documents that matched the query.
"query": {
"has_child": {
"type": b,
"query": {
"match": {
"b_propertie1": "SOMETHING"
}
},
"inner_hits": {
'_source': {
'includes': ['b_propertie1', 'b_propertie2']
}
}
}
}
Then in your app, you can merge the fields from parent and child documents to get the result you want.
I hope it helps. :)
I have an index like this:
{
"rentals": {
"aliases": {},
"mappings": {
"rental": {
"properties": {
"address": {
"type": "text"
},
"availability": {
"type": "nested",
"properties": {
"chargeBasis": {
"type": "text"
},
"date": {
"type": "date"
},
"isAvailable": {
"type": "boolean"
},
"rate": {
"type": "double"
}
}
}
}
And this is my use case:
I need to search for all the "rentals" that have a given address.
This is easy and done
I need to get "availability" data for all those "rentals" searched; only for today's date.
This is the part where I'm stuck at, how do I query the nested documents of all the "rentals"?
You need to use the nested query:
Because nested objects are indexed as separate hidden documents, we can’t query them directly. Instead, we have to use the nested query to access them.
Try something like:
{
"query": {
"nested": {
"path": "availability",
"query": {
"term": {
"availability.date": "2015-01-01"
}
}
}
}
}