Is the filter "pinyin" supported in Custom normalizer filter？

[jeasonchan]

hi medcl: Is the filter "pinyin" supported in Custom normalizer filter？ Offical site says, "Custom normalizers take a list of character filters and a list of token filters." But when I try to customize a normalizer with the filter "pinyin" provided from elasticsearch-analysis-pinyin with the following json，error is returned.

  老哥，我看官网说正规器可以使用分析器里用到的那些filter，但是，我用下面的json串设置字段映射时，报错了，内容如下。是不是项目里提供的pinyin  filter不支持用在normalizer 里的filter啊？

# filters defiend in setings  ====================
"filter": {
                "english_stop": {
                    "type": "stop",
                    "stopwords": "_english_"
                },
                "pinyin_filter": {
                    "type": "pinyin",
                    "keep_separate_first_letter": false,
                    "keep_full_pinyin": true,
                    "keep_original": true,
                    "limit_first_letter_length": 16,
                    "lowercase": true,
                    "remove_duplicated_term": true
                }
            },
            "normalizer": {
                "pinyin_normalizer": {
                    "type": "custom",
                    "char_filter": [],
                    "filter": ["pinyin_filter"]
                }
            }

#    mapping   ==================================

    {
                "string_keyword_fields": {
                    "match": "*",
                    "unmatch": "*_html_",
                    "match_mapping_type": "string",
                    "mapping": {
                        "type": "keyword",
                        "normalizer": "pinyin_normalizer"
                    }
                }
            }

# response =====================
{
    "error": {
        "root_cause": [
            {
                "type": "illegal_argument_exception",
                "reason": "Custom normalizer [pinyin_normalizer] may not use filter [pinyin_filter]"
            }
        ],
        "type": "illegal_argument_exception",
        "reason": "Custom normalizer [pinyin_normalizer] may not use filter [pinyin_filter]"
    },
    "status": 400
}

[jeasonchan]

After reviewing the office site again, I got this: The current list of filters that can be used in a normalizer is following: arabic_normalization, asciifolding, bengali_normalization, cjk_width, decimal_digit, elision, german_normalization, hindi_normalization, indic_normalization, lowercase, persian_normalization, scandinavian_folding, serbian_normalization, sorani_normalization, uppercase.

So it menans filters that can be used in custom normalizer are just in the list above and that is why es returns "Custom normalizer [pinyin_normalizer] may not use filter [pinyin_filter]".

Thx