DynamicTemplates serializes MatchMappingType as a list #905
Description
Java API client version
8.15.3
Java version
8
Elasticsearch Version
8.4.3
Problem description
Hey guys, I have some code that's using the indices().putMapping() API, and I think that I have found an issue when building the PutMappingRequest object.
I'm using the withJson() method, with this input:
{
"dynamic_templates": [
{
"aggregate_template": {
"match_mapping_type": "string",
"match": "*___aggregate",
"mapping": {
"type": "text"
}
}
}
]
}
Notice how the match_mapping_type is a String primitive, not a list. Now, when the Builder constructs the PutMappingRequest object, the request that it generates has this form:
PutMappingRequest: PUT /index/_mapping {"dynamic_templates":[{"attach_template":{"match":["attach___*"],"match_mapping_type":["string"],"mapping":{"type":"text"}}}]}
Notice how the match_mapping_type field was converted to a list. When using that in the request body to update the mapping, the ES responds with a 400 status:
{
"root_cause": [
{
"type": "mapper_parsing_exception",
"reason": "Failed to parse mapping: No field type matched on [[string]], possible values are [object, string, long, double, boolean, date, binary]"
}
],
"type": "mapper_parsing_exception",
"reason": "Failed to parse mapping: No field type matched on [[string]], possible values are [object, string, long, double, boolean, date, binary]",
"caused_by": {
"type": "illegal_argument_exception",
"reason": "No field type matched on [[string]], possible values are [object, string, long, double, boolean, date, binary]"
}
}
But if I use the match_mapping_type as a String (as it was originally in my JSON), it works. In short, the client is building this body:
{
"dynamic_templates": [
{
"attach_template": {
"match": [
"attach___*"
],
"match_mapping_type": [
"string"
],
"mapping": {
"type": "text"
}
}
}
]
}
When it seems that it should be:
{
"dynamic_templates": [
{
"attach_template": {
"match": [
"attach___*"
],
"match_mapping_type": "string",
"mapping": {
"type": "text"
}
}
}
]
}