EdgeNGramTokenFilterV2 doesn't work - only full token search works

[L-Sypniewski]

EdgeNGramTokenFilterV2 doesn't work, fields are searchable with full token search though, happy to help on fixing this. If indexed Description is "some description" results are obtained only for some description, some or description search terms.

My token.json:

{
    "@odata.context": ".....",
    "@odata.etag": "......",
    "name": "my-index",
    "defaultScoringProfile": null,
    "fields": [
        {
            "name": "Description",
            "type": "Edm.String",
            "searchable": true,
            "filterable": false,
            "retrievable": true,
            "sortable": false,
            "facetable": false,
            "key": false,
            "indexAnalyzer": "names",
            "searchAnalyzer": "textStandardSearchAnalyzer",
            "analyzer": null,
            "normalizer": null,
            "synonymMaps": []
        }
    ],
    "scoringProfiles": [],
    "corsOptions": null,
    "suggesters": [],
    "analyzers": [
        {
            "@odata.type": "#Microsoft.Azure.Search.CustomAnalyzer",
            "name": "textStandardSearchAnalyzer",
            "tokenizer": "whitespace",
            "tokenFilters": [
                "trim",
                "lowercase",
                "asciifolding"
            ],
            "charFilters": []
        },
        {
            "@odata.type": "#Microsoft.Azure.Search.CustomAnalyzer",
            "name": "names",
            "tokenizer": "whitespace",
            "tokenFilters": [
                "trim",
                "lowercase",
                "asciifolding",
                "nGramTokenFilter2To20Chars"
            ],
            "charFilters": []
        }
    ],
    "normalizers": [],
    "tokenizers": [],
    "tokenFilters": [
        {
            "@odata.type": "#Microsoft.Azure.Search.EdgeNGramTokenFilterV2",
            "name": "nGramTokenFilter2To20Chars",
            "minGram": 2,
            "maxGram": 20,
            "side": "front"
        }
    ],
    "charFilters": [],
    "encryptionKey": null,
    "similarity": {
        "@odata.type": "#Microsoft.Azure.Search.BM25Similarity",
        "k1": null,
        "b": null
    },
    "semantic": null
}

[tomasloksa]

Hey, It would be great if you could help. Do you have an idea, how could it be implemented?

I will be away for the rest of the week, but I could have a look at it later. There are some postman tests directly in the repo and much more, that are "indirectly" testing the emulator in my company's private repo - I could run them for you, if you open a PR.

[L-Sypniewski]

As for now I have no idea how it could be implemented, I have looked into the current code very briefly as I was figuring out how the SolrSearchQueryBuilderworks since I had some issues with it. I would be able to dedicate time for this issue only on every second Friday and Monday, but I'll try to go through the existing codebase this weekend to have at least a general idea how stuff works and how the issue might be approached.