Elasticsearch aggregation by field name
up vote
0
down vote
favorite
Imagine two documents:
[
{
"_id": "abc",
"categories": {
"category-id-1": 1,
"category-id-2": 50
}
},
{
"_id": "def",
"categories": {
"category-id-1": 2
}
}
]
As you can see, each document can be associated with a number of categories, by setting a nested field into the categories field.
With this mapping, I should be able to request the documents from a defined category and to order them by the value set as value for this field.
My problem is that I now want to make an aggregation to count for each category the number of documents. That would give the following result for the dataset I provided:
{
"aggregations": {
"categories" : {
"buckets": [
{
"key": "category-id-1",
"doc_count": 2
},
{
"key": "category-id-2",
"doc_count": 1
}
]
}
}
}
I can't find anything in the documentation to solve this problem. I'm completely new to ElasticSearch so I may be doing something wrong either on my documentation research or on my mapping choice.
Is it possible to make this kind of aggregation with my mapping? I'm using ES 6.x
EDIT: Here is the mapping for the index:
{
"test1234": {
"mappings": {
"_doc": {
"properties": {
"categories": {
"properties": {
"category-id-1": {
"type": "long"
},
"category-id-2": {
"type": "long"
}
}
}
}
}
}
}
}
elasticsearch asked Nov 19 at 15:12
Hammerbot
5,10031647
add a comment |
up vote
0
down vote
favorite
Imagine two documents:
[
{
"_id": "abc",
"categories": {
"category-id-1": 1,
"category-id-2": 50
}
},
{
"_id": "def",
"categories": {
"category-id-1": 2
}
}
]
As you can see, each document can be associated with a number of categories, by setting a nested field into the categories field.
With this mapping, I should be able to request the documents from a defined category and to order them by the value set as value for this field.
My problem is that I now want to make an aggregation to count for each category the number of documents. That would give the following result for the dataset I provided:
{
"aggregations": {
"categories" : {
"buckets": [
{
"key": "category-id-1",
"doc_count": 2
},
{
"key": "category-id-2",
"doc_count": 1
}
]
}
}
}
I can't find anything in the documentation to solve this problem. I'm completely new to ElasticSearch so I may be doing something wrong either on my documentation research or on my mapping choice.
Is it possible to make this kind of aggregation with my mapping? I'm using ES 6.x
EDIT: Here is the mapping for the index:
{
"test1234": {
"mappings": {
"_doc": {
"properties": {
"categories": {
"properties": {
"category-id-1": {
"type": "long"
},
"category-id-2": {
"type": "long"
}
}
}
}
}
}
}
}
asked Nov 19 at 15:12
Hammerbot
5,10031647
could you post your mapping?
– Lupanoide
Nov 19 at 15:20
Hi, thank you for commenting, I added the mapping to the question.
– Hammerbot
Nov 19 at 15:23
so if I understand well you would like to retrieve not the aggregated values of key category-id-1 , but the number of docs which have the field category-id-1, right?
– Lupanoide
Nov 19 at 15:26
Exactly, without mentioningcategory-id-1norcategory-id-2in my request.
– Hammerbot
Nov 19 at 15:27
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Imagine two documents:
[
{
"_id": "abc",
"categories": {
"category-id-1": 1,
"category-id-2": 50
}
},
{
"_id": "def",
"categories": {
"category-id-1": 2
}
}
]
As you can see, each document can be associated with a number of categories, by setting a nested field into the categories field.
With this mapping, I should be able to request the documents from a defined category and to order them by the value set as value for this field.
My problem is that I now want to make an aggregation to count for each category the number of documents. That would give the following result for the dataset I provided:
{
"aggregations": {
"categories" : {
"buckets": [
{
"key": "category-id-1",
"doc_count": 2
},
{
"key": "category-id-2",
"doc_count": 1
}
]
}
}
}
I can't find anything in the documentation to solve this problem. I'm completely new to ElasticSearch so I may be doing something wrong either on my documentation research or on my mapping choice.
Is it possible to make this kind of aggregation with my mapping? I'm using ES 6.x
EDIT: Here is the mapping for the index:
{
"test1234": {
"mappings": {
"_doc": {
"properties": {
"categories": {
"properties": {
"category-id-1": {
"type": "long"
},
"category-id-2": {
"type": "long"
}
}
}
}
}
}
}
}
asked Nov 19 at 15:12
Hammerbot
5,10031647
Imagine two documents:
[
{
"_id": "abc",
"categories": {
"category-id-1": 1,
"category-id-2": 50
}
},
{
"_id": "def",
"categories": {
"category-id-1": 2
}
}
]
As you can see, each document can be associated with a number of categories, by setting a nested field into the categories field.
With this mapping, I should be able to request the documents from a defined category and to order them by the value set as value for this field.
My problem is that I now want to make an aggregation to count for each category the number of documents. That would give the following result for the dataset I provided:
{
"aggregations": {
"categories" : {
"buckets": [
{
"key": "category-id-1",
"doc_count": 2
},
{
"key": "category-id-2",
"doc_count": 1
}
]
}
}
}
I can't find anything in the documentation to solve this problem. I'm completely new to ElasticSearch so I may be doing something wrong either on my documentation research or on my mapping choice.
Is it possible to make this kind of aggregation with my mapping? I'm using ES 6.x
EDIT: Here is the mapping for the index:
{
"test1234": {
"mappings": {
"_doc": {
"properties": {
"categories": {
"properties": {
"category-id-1": {
"type": "long"
},
"category-id-2": {
"type": "long"
}
}
}
}
}
}
}
}
asked Nov 19 at 15:12
Hammerbot
5,10031647
asked Nov 19 at 15:12
Hammerbot
5,10031647
edited Nov 19 at 15:23
asked Nov 19 at 15:12
Hammerbot
5,10031647
asked Nov 19 at 15:12
Hammerbot
5,10031647
asked Nov 19 at 15:12
Hammerbot
5,10031647
5,10031647
could you post your mapping?
– Lupanoide
Nov 19 at 15:20
Hi, thank you for commenting, I added the mapping to the question.
– Hammerbot
Nov 19 at 15:23
so if I understand well you would like to retrieve not the aggregated values of key category-id-1 , but the number of docs which have the field category-id-1, right?
– Lupanoide
Nov 19 at 15:26
Exactly, without mentioningcategory-id-1norcategory-id-2in my request.
– Hammerbot
Nov 19 at 15:27
add a comment |
could you post your mapping?
– Lupanoide
Nov 19 at 15:20
Hi, thank you for commenting, I added the mapping to the question.
– Hammerbot
Nov 19 at 15:23
so if I understand well you would like to retrieve not the aggregated values of key category-id-1 , but the number of docs which have the field category-id-1, right?
– Lupanoide
Nov 19 at 15:26
Exactly, without mentioningcategory-id-1norcategory-id-2in my request.
– Hammerbot
Nov 19 at 15:27
could you post your mapping?
– Lupanoide
Nov 19 at 15:20
could you post your mapping?
– Lupanoide
Nov 19 at 15:20
Hi, thank you for commenting, I added the mapping to the question.
– Hammerbot
Nov 19 at 15:23
Hi, thank you for commenting, I added the mapping to the question.
– Hammerbot
Nov 19 at 15:23
so if I understand well you would like to retrieve not the aggregated values of key category-id-1 , but the number of docs which have the field category-id-1, right?
– Lupanoide
Nov 19 at 15:26
so if I understand well you would like to retrieve not the aggregated values of key category-id-1 , but the number of docs which have the field category-id-1, right?
– Lupanoide
Nov 19 at 15:26
Exactly, without mentioning
category-id-1 nor category-id-2 in my request.– Hammerbot
Nov 19 at 15:27
Exactly, without mentioning
category-id-1 nor category-id-2 in my request.– Hammerbot
Nov 19 at 15:27
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
accepted
The most straightforward solution is to use a new field that contains all the distinct categories of a document.
If we call this field categories_list here could be a solution :
Change the mapping to
{
"test1234": {
"mappings": {
"_doc": {
"properties": {
"categories": {
"properties": {
"category-id-1": {
"type": "long"
},
"category-id-2": {
"type": "long"
}
}
},
"categories_list": {
"type": "keyword"
}
}
}
}
}
}
Then you need to modify your documents like this :
[
{
"_id": "abc",
"categories": {
"category-id-1": 1,
"category-id-2": 50
},
"categories_list": ["category-id-1", "category-id-2"]
},
{
"_id": "def",
"categories": {
"category-id-1": 2
},
"categories_list": ["category-id-1"]
}
]
then your aggregation request should be
{
"aggs": {
"categories": {
"terms": {
"field": "categories_list",
"size": 10
}
}
}
}
and will return
"aggregations": {
"categories": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "category-id-1",
"doc_count": 2
},
{
"key": "category-id-2",
"doc_count": 1
}
]
}
}
answered Nov 20 at 10:03
Pierre Mallet
3,0231416
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
The most straightforward solution is to use a new field that contains all the distinct categories of a document.
If we call this field categories_list here could be a solution :
Change the mapping to
{
"test1234": {
"mappings": {
"_doc": {
"properties": {
"categories": {
"properties": {
"category-id-1": {
"type": "long"
},
"category-id-2": {
"type": "long"
}
}
},
"categories_list": {
"type": "keyword"
}
}
}
}
}
}
Then you need to modify your documents like this :
[
{
"_id": "abc",
"categories": {
"category-id-1": 1,
"category-id-2": 50
},
"categories_list": ["category-id-1", "category-id-2"]
},
{
"_id": "def",
"categories": {
"category-id-1": 2
},
"categories_list": ["category-id-1"]
}
]
then your aggregation request should be
{
"aggs": {
"categories": {
"terms": {
"field": "categories_list",
"size": 10
}
}
}
}
and will return
"aggregations": {
"categories": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "category-id-1",
"doc_count": 2
},
{
"key": "category-id-2",
"doc_count": 1
}
]
}
}
answered Nov 20 at 10:03
Pierre Mallet
3,0231416
add a comment |
up vote
1
down vote
accepted
The most straightforward solution is to use a new field that contains all the distinct categories of a document.
If we call this field categories_list here could be a solution :
Change the mapping to
{
"test1234": {
"mappings": {
"_doc": {
"properties": {
"categories": {
"properties": {
"category-id-1": {
"type": "long"
},
"category-id-2": {
"type": "long"
}
}
},
"categories_list": {
"type": "keyword"
}
}
}
}
}
}
Then you need to modify your documents like this :
[
{
"_id": "abc",
"categories": {
"category-id-1": 1,
"category-id-2": 50
},
"categories_list": ["category-id-1", "category-id-2"]
},
{
"_id": "def",
"categories": {
"category-id-1": 2
},
"categories_list": ["category-id-1"]
}
]
then your aggregation request should be
{
"aggs": {
"categories": {
"terms": {
"field": "categories_list",
"size": 10
}
}
}
}
and will return
"aggregations": {
"categories": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "category-id-1",
"doc_count": 2
},
{
"key": "category-id-2",
"doc_count": 1
}
]
}
}
answered Nov 20 at 10:03
Pierre Mallet
3,0231416
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
The most straightforward solution is to use a new field that contains all the distinct categories of a document.
If we call this field categories_list here could be a solution :
Change the mapping to
{
"test1234": {
"mappings": {
"_doc": {
"properties": {
"categories": {
"properties": {
"category-id-1": {
"type": "long"
},
"category-id-2": {
"type": "long"
}
}
},
"categories_list": {
"type": "keyword"
}
}
}
}
}
}
Then you need to modify your documents like this :
[
{
"_id": "abc",
"categories": {
"category-id-1": 1,
"category-id-2": 50
},
"categories_list": ["category-id-1", "category-id-2"]
},
{
"_id": "def",
"categories": {
"category-id-1": 2
},
"categories_list": ["category-id-1"]
}
]
then your aggregation request should be
{
"aggs": {
"categories": {
"terms": {
"field": "categories_list",
"size": 10
}
}
}
}
and will return
"aggregations": {
"categories": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "category-id-1",
"doc_count": 2
},
{
"key": "category-id-2",
"doc_count": 1
}
]
}
}
answered Nov 20 at 10:03
Pierre Mallet
3,0231416
The most straightforward solution is to use a new field that contains all the distinct categories of a document.
If we call this field categories_list here could be a solution :
Change the mapping to
{
"test1234": {
"mappings": {
"_doc": {
"properties": {
"categories": {
"properties": {
"category-id-1": {
"type": "long"
},
"category-id-2": {
"type": "long"
}
}
},
"categories_list": {
"type": "keyword"
}
}
}
}
}
}
Then you need to modify your documents like this :
[
{
"_id": "abc",
"categories": {
"category-id-1": 1,
"category-id-2": 50
},
"categories_list": ["category-id-1", "category-id-2"]
},
{
"_id": "def",
"categories": {
"category-id-1": 2
},
"categories_list": ["category-id-1"]
}
]
then your aggregation request should be
{
"aggs": {
"categories": {
"terms": {
"field": "categories_list",
"size": 10
}
}
}
}
and will return
"aggregations": {
"categories": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "category-id-1",
"doc_count": 2
},
{
"key": "category-id-2",
"doc_count": 1
}
]
}
}
answered Nov 20 at 10:03
Pierre Mallet
3,0231416
answered Nov 20 at 10:03
Pierre Mallet
3,0231416
answered Nov 20 at 10:03
Pierre Mallet
3,0231416
answered Nov 20 at 10:03
Pierre Mallet
3,0231416
3,0231416
add a comment |
add a comment |
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could you post your mapping?
– Lupanoide
Nov 19 at 15:20
Hi, thank you for commenting, I added the mapping to the question.
– Hammerbot
Nov 19 at 15:23
so if I understand well you would like to retrieve not the aggregated values of key category-id-1 , but the number of docs which have the field category-id-1, right?
– Lupanoide
Nov 19 at 15:26
Exactly, without mentioning
category-id-1norcategory-id-2in my request.– Hammerbot
Nov 19 at 15:27