I am using the phrase suggester to implement did-you-mean functionality. My
source field is named did_you_mean_source which is a combination of first
and last name with a space in the middle.
When I search for say "allex blak" I do get fairly descent suggestions,
including the "alex black" I am hoping to get.
*The problem is I also get "alex [any other first and/or last name present
in the index that has a subbestion for blak]". This suggestion doesn't
match to any "results" (not suggestion result) but actual search result in
my index.*
So you search for first and last name which you happen to misspelled, but
the suggestions propose another spelling which doesn't actually return any
index search results. In other words, I need to somehow preserve the
identity that one is a first name and the other is a last name.
What I am trying to achieve is a did-you-mean functionality where I can
type a first and last name, and get suggestions based of of the
did_you_mean_source but only where both typed words match a document.
Here's my analyzer:
did_you_mean:
type: custom
tokenizer: standard
filter: ["lowercase", "trim",]
Here's the suggest part of my query:
"suggest": {
"text": "allex blak",
"did_you_mean" : {
"phrase" : {
"field": "did_you_mean_source",
"real_word_error_likelihood": 0.90,
"max_errors": 1,
"direct_generator" : [{
"field" : "did_you_mean_source",
"suggest_mode" : "always",
"min_word_length" : 3,
"size": 5,
"prefix_length": 2,
"min_doc_freq": 1
}]
}
}
}
Here's what my mappings look like:
{
"development_search_suggestions": {
"mappings": {
"search_suggestion": {
"_all": {
"enabled": false
},
"properties": {
"did_you_mean_source": {
"type": "string",
"analyzer": "did_you_mean"
},
"keywords": {
"type": "string",
"index_options": "offsets",
"analyzer": "full",
"fields": {
"partial": {
"type": "string",
"index_options": "offsets",
"index_analyzer": "partial_auto_suggest",
"search_analyzer": "full_with_auto_suggest_synonyms"
},
"synonymic": {
"type": "string",
"index_analyzer": "full_with_auto_suggest_synonyms",
"search_analyzer": "full"
}
}
},
"keywords_auxiliary": {
"type": "string",
"index_options": "offsets",
"analyzer": "full",
"fields": {
"partial": {
"type": "string",
"index_options": "offsets",
"index_analyzer": "partial_auto_suggest",
"search_analyzer": "full_with_auto_suggest_synonyms"
},
"synonymic": {
"type": "string",
"index_analyzer": "full_with_auto_suggest_synonyms",
"search_analyzer": "full"
}
}
}
}
}
}
}
}
*A few examples:*
Say my index contains the following documents with first and last name in
respective orders:
bruno miranda
miranda bella
bran scott
If I search for: "brno miranda" I should get a suggestion for "bruno
miranda" but I should not have suggestions for "bran miranda" because that
document doesn't exist in the db. It's simply a mismatch of a first name +
a different document's last name.
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