tokenizer with char filter

tokenizer_with_char_filter

{
    "settings": {
        "number_of_shards": 5,
        "analysis": {
            "analyzer": {
                "happy_tokens": {
                    "type": "pattern",
                    "tokenizer": "split_on_comma",
                    "char_filter": ["kill_pluses"]
                }
            },
            "tokenizer": {
                "split_on_comma": {
                    "type":      "pattern",
                    "pattern":   "([,]+)"
                }
            },
            "char_filter": {
                "kill_pluses": {
                    "type": "pattern_replace",
                    "pattern": "+",
                    "replace": " "
                }
            } 
        }
    },
    "mappings": {
        "post" : {
            "properties" : {
                "query_string.keywords" : {
                    "type": "string",
                    "analyzer" : "happy_tokens"
                }
            }
        }
    }
}