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How to use search templates in Elasticsearch

After providing a search template, use this to call the template with parameters.

POST /[index-name]/_search/template?search_type=dfs_query_then_fetch
{
"id": "[template-name]",
"params": {
"size": 10,
"query": "Thé"
}
}

Make sure to provide all parameters that are required by the template. Otherwise it can happen that the parsing of the template fails.

For example when removing the size param, parsing the template fails with:

{
"error" : {
"root_cause" : [
{
"type" : "number_format_exception",
"reason" : "empty String"
}
],
"type" : "number_format_exception",
"reason" : "empty String"
},
"status" : 400
}

#published

These notes are unpolished collections of thoughts, unfinished ideas, and things I want to remember later. In the spirit of learning in public, I'm sharing them here. Have fun exploring, if you want!
© 2021 by Adrian Philipp