lessmore/map.json

{
    "mappings" : {
        "post" : {
            "properties" : {
                "date" : {
                    "type" : "keyword",
	                "fields": {
		                "keyword": {
	    		            "type": "keyword"
		                }
		            }
                },
                "echo" : {
                    "type" : "keyword",
	                "fields": {
		                "keyword": {
	    		            "type": "keyword"
		                }
		            }
                }
	        }
        }
    }
}