Is it possible to use multi-fields to set and query multilingual fields?
Consider this mapping:
PUT multi_test
{
"mappings": {
"data": {
"_field_names": {
"enabled": false
},
"properties": {
"book_title": {
"type": "text",
"fields": {
"english": {
"type": "text",
"analyzer": "english"
},
"german": {
"type": "text",
"analyzer": "german"
},
"italian": {
"type": "text",
"analyzer": "italian"
}
}
}
}
}
}
}
I tried the following, but it doesn't work:
PUT multi_test/data/1
{
"book_title.english": "It's good",
"book_title.german": "Das gut"
}
The error seems to indicate I'm trying to add new fields:
{ "error": { "root_cause": [ { "type": "mapper_parsing_exception",
"reason": "Could not dynamically add mapping for field
[book_title.english]. Existing mapping for [book_title] must be of
type object but found [text]." } ], "type":
"mapper_parsing_exception", "reason": "Could not dynamically add
mapping for field [book_title.english]. Existing mapping for
[book_title] must be of type object but found [text]." }, "status":
400 }
What am I doing wrong here?
If my approach is unworkable, what is a better way to do this?
The problem is that you are using using fields for the field book_title.
Fields keyword is used when you want to keep same field and data in multiple ways i.e using different analyzers or some other setting changes but values should be same in all field names under fields.Here is the link describing what is keyword fields https://www.elastic.co/guide/en/elasticsearch/reference/2.4/multi-fields.html
In you use case the mapping should be like below
PUT multi_test
{
"mappings": {
"data": {
"_field_names": {
"enabled": false
},
"properties": {
"book_title": {
"properties": {
"english": {
"type": "text",
"analyzer": "english"
},
"german": {
"type": "text",
"analyzer": "german"
},
"italian": {
"type": "text",
"analyzer": "italian"
}
}
}
}
}
}
}
This will define book_title as object type and you can add multiple fields with different data under book_title
Related
My json for ElasticSearch schema looks like this :-
{
"mappings": {
"properties": {
"DESCRIPTION_FR": {
"type": "text",
"analyzer": "french"
},
"FEEDBACK_FR": {
"type": "text",
"analyzer": "french"
},
"SOURCE_FR": {
"type": "text",
"analyzer": "french"
}
}
}
}
There are 100 of properties like this. Replicating a change across all the properties with this approach is redundant and erroneous.
Is there a way in ElasticSearch 7.2 to write custom data type and reuse it in property mapping.
{
"settings": {
//definition of custom type "text_fr"
},
"mappings": {
"properties": {
"DESCRIPTION_FR": {
"type": "text_fr"
},
"FEEDBACK_FR": {
"type": "text_fr"
},
"SOURCE_FR": {
"type": "text_fr"
}
}
}
}
Yes! What you're after is dynamic mapping templates. More specifically the match feature.
Define the target field names with a leading wildcard:
PUT my_index
{
"mappings": {
"dynamic_templates": [
{
"is_french_text": {
"match_mapping_type": "*",
"match": "*_FR",
"mapping": {
"type": "text",
"analyzer": "french"
}
}
}
]
}
}
Insert a doc:
POST my_index/_doc
{
"DESCRIPTION_FR": "je",
"FEEDBACK_FR": "oui",
"SOURCE_FR": "je ne sais quoi"
}
Verify the dynamically generated mapping:
GET my_index/_mapping
I'm creating mapping for multiple type
here my query
PUT opl_consultation/_mapping
my json mapping file
{
"mappings": {
"article": {
"properties": {
"numero_noeud": { "type": "text" },
"intitule_fr": { "type": "text" },
"path_audio": { "type": "text" }
}
},
"hierarchie": {
"properties": {
"id_type_noeud_hie": { "type": "integer" },
"noeud_numero_hie": { "type": "text" },
"intitule_hie_fr": { "type": "text" }
}
},
"law_type": {
"properties": {
"id_type_loi": { "type": "integer" },
"Desc_law_type": { "type": "text" }
}
}
}
}
below the error a got
"type": "action_request_validation_exception",
"reason": "Validation Failed: 1: mapping type is missing;"
},
"status": 400
}
the version is Elasticsearch\6.4.2
In Elasticsearch 6.4.2 you cannot have more than one mapping type. See https://www.elastic.co/guide/en/elasticsearch/reference/current/removal-of-types.html
If you run your query instead as PUT opl_consultation with your mapping definition you will get the below error
"type": "illegal_argument_exception",
"reason": "Rejecting mapping update to [opl_consultation] as the final mapping would have more than 1 type: [law_type, article, hierarchie]"
Instead, use a custom type field as described here
I have the following structure recorded in elastic:
PUT /movies
{
"mappings": {
"title": {
"properties": {
"title": {
"type": "string",
"fields": {
"de": {
"type": "string",
"analyzer": "german"
},
"en": {
"type": "string",
"analyzer": "english"
},
"fr": {
"type": "string",
"analyzer": "french"
},
"es": {
"type": "string",
"analyzer": "spanish"
}
}
}
}
}
}
}
But when I am trying to record values like this:
PUT movies/_doc/2
{
"title": "fox",
"field": "en"
}
I receive the following error:
{
"error": {
"root_cause": [
{
"type": "illegal_argument_exception",
"reason": "Rejecting mapping update to [movies] as the final mapping would have more than 1 type: [_doc, title]"
}
],
"type": "illegal_argument_exception",
"reason": "Rejecting mapping update to [movies] as the final mapping would have more than 1 type: [_doc, title]"
},
"status": 400
}
Maybe I am doing something wrong since I am fairly new to elastic. My idea is to create one to one mapping and when I am searching for Fox in any of these languages to return results only in english since they are recorded in the DB.
Your mapping indicates a mapping type "title" but when you create the documents you use PUT movies/_doc/2 that indicates mapping type _doc which doesn't exist so ES will try to automatically create it, and in newer version of ES having multiple mapping types is forbidden.
You should just change it to: PUT movies/title/2
I have created the index in elasticsearch with the following mapping:
{
"test": {
"mappings": {
"documents": {
"properties": {
"fields": {
"type": "nested",
"properties": {
"uid": {
"type": "keyword"
},
"value": {
"type": "text",
"copy_to": [
"fulltext"
]
}
}
},
"fulltext": {
"type": "text"
},
"tags": {
"type": "text"
},
"title": {
"type": "text",
"fields": {
"raw": {
"type": "keyword"
}
}
},
"url": {
"type": "text",
"fields": {
"raw": {
"type": "keyword"
}
}
}
}
}
}
}
}
While searching I want to set the preference of fields for example if search text found in title or url then that document comes first then other documents.
Can we set a field preference for search result sequence(in my case preference like title,url,tags,fields)?
Please help me into this?
This is called "boosting" . Prior to elasticsearch 5.0.0 - boosting could be applied in indexing phase or query phase( added as part of field mapping ). This feature is deprecated now and all mappings after 5.0 are applied in query time .
Current recommendation is to to use query time boosting.
Please read this documents to get details on how to use boosting:
1 - https://www.elastic.co/guide/en/elasticsearch/guide/current/_boosting_query_clauses.html
2 - https://www.elastic.co/guide/en/elasticsearch/guide/current/_boosting_query_clauses.html
I'm trying to use multi field properties for multi language support. I created following mapping for this:
{
"mappings": {
"product": {
"properties": {
"prod-id": {
"type": "string"
},
"prod-name": {
"type": "string",
"fields": {
"en": {
"type": "string",
"analyzer": "english"
},
"fr": {
"type": "string",
"analyzer": "french"
}
}
}
}
}
}
}
I created test record:
{
"prod-id": "1234567",
"prod-name": [
"Test product",
"Produit d'essai"
]
}
and tried to query using some language:
{
"query": {
"bool": {
"must": [
{"match": {
"prod-name.en": "Produit"
}}
]
}
}
}
As a result I got my document. But I expected that I will have empty result when I use French but choose English. It seems ElasticSearch ignores which field I specified in query. There is no difference in search result when I use "prod-name.en" or "prod-name.fr" or just "prod-name". Is this behaviour expected? Should I do some special things to have searching just in one language?
Another problem with updating multi field property. I can't update just one field.
{
"doc" : {
"prod-name.en": "Test"
}
}
I got following error:
{
"error": {
"root_cause": [
{
"type": "mapper_parsing_exception",
"reason": "Field name [prod-name.en] cannot contain '.'"
}
],
"type": "mapper_parsing_exception",
"reason": "Field name [prod-name.en] cannot contain '.'"
},
"status": 400
}
Is there any way to update just one field in multi field property?
In your mapping, the prod-name.en field will simply be analyzed using the english analyzer and the same for the french field. However, ES will not choose for you which value to put in which field.
Instead, you need to modify your mapping like this
{
"mappings": {
"product": {
"properties": {
"prod-id": {
"type": "string"
},
"prod-name": {
"type": "object",
"properties": {
"en": {
"type": "string",
"analyzer": "english"
},
"fr": {
"type": "string",
"analyzer": "french"
}
}
}
}
}
}
}
and input document to be like this and you'll get the results you expect.
{
"prod-id": "1234567",
"prod-name": {
"en": "Test product",
"fr": "Produit d'essai"
}
}
As for the updating part, your partial document should be like this instead.
{
"doc" : {
"prod-name": {
"en": "Test"
}
}
}