CODEWITHSUNDEEP
elasticsearch
eric
eric

Reputation: 2759

Elasticsearch Dynamic Templates not working with Nested Documents

I Really thought I had this working, but I'm actually having issues. I have a dynamic template set up to match nested documents. I set up my mappings like so:

curl -XPUT 'http://localhost:9200/test/' -d '{
    "mappings": {
        "Item": {
            "dynamic_templates": [
                {
                    "metadata_template": {
                        "match_mapping_type": "string",
                        "path_match": "metadata.*",
                        "mapping": {
                            "type": "multi_field",
                            "fields": {
                                "{name}": {
                                    "type": "{dynamic_type}",
                                    "index": "analyzed"
                                },
                                "standard": {
                                    "type": "{dynamic_type}",
                                    "index": "analyzed",
                                    "analyzer" : "standard"
                                }
                            }
                        }
                    }
                }
            ]
        }
    },
    "settings": {
        "analysis": {
            "filter": {
                "my_ngram": {
                    "max_gram": 10,
                    "min_gram": 1,
                    "type": "nGram"
                },
                "lb_stemmer": {
                    "type": "stemmer",
                    "name": "english"
                }
            },
            "analyzer": {
                "default_index": {
                    "filter": [
                        "standard",
                        "lowercase",
                        "asciifolding",
                        "my_ngram"
                    ],
                    "type": "custom",
                    "tokenizer": "keyword"
                },
                "default_search": {
                    "filter": [
                        "standard",
                        "lowercase"
                    ],
                    "type": "custom",
                    "tokenizer": "standard"
                }
            }
        }
    }
}'

My expectation is that all fields that start with "metadata." should be stored in an analyzed field and in an unanalyzed field with the suffix ".standard". Am I completely misunderstanding this?

I add an item:

curl -XPUT localhost:9200/test/Item/1 -d '{
                           "name" : "test", 
                           "metadata" : {
                                "strange_tag" : "CLEAN_2C_abcdefghij_07MAY2005_AB" 
                                }
                            }'

This query works great:

{
    "query": {
        "match": {
            "metadata.strange_tag": {
                "query": "CLEAN_2C_abcdefghij_07MAY2005_AB",
                "type": "boolean"
            }
        }
    }
}

But the searching for the word CLEAN, or clean doesn't return any results. I expect that field to have gone through the ngram tokenizer. Anyone have a suggestion for what I'm doing wrong?

Upvotes: 0

Views: 1952

Answers (1)

eric
eric

Reputation: 2759

Looks l like I was incorrectly creating my NGRAM analyzer. Here is a working example: 

curl -XDELETE 'localhost:9200/test'

    curl -XPUT 'localhost:9200/test' -d '{
    "settings": {
        "analysis": {
            "analyzer": {
                "my_ngram_analyzer": {
                    "tokenizer": "my_ngram_tokenizer",
                    "filter": [
                        "standard",
                        "lowercase",
                        "asciifolding"
                    ]
                }
            },
            "tokenizer": {
                "my_ngram_tokenizer": {
                    "type": "nGram",
                    "min_gram": "2",
                    "max_gram": "3",
                    "token_chars": [
                        "letter",
                        "digit"
                    ]
                }
            }
        }
    },
    "mappings": {
        "Item": {
            "dynamic_templates": [
                {
                    "metadata_template": {
                        "match_mapping_type": "string",
                        "path_match": "*",
                        "mapping": {
                            "type": "multi_field",
                            "fields": {
                                "{name}": {
                                    "type": "{dynamic_type}",
                                    "index": "analyzed",
                                    "analyzer" : "my_ngram_analyzer"
                                },
                                "standard": {
                                    "type": "{dynamic_type}",
                                    "index": "analyzed",
                                    "analyzer": "standard"
                                }
                            }
                        }
                    }
                }
            ]
        }
    }
}'

Upvotes: 1

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