Stacked charts contain redundant and incorrect fields

[edmundoa]

Looking at a stacked chart in the database, I realised there are duplicated fields in it's configuration:

{
    "creator_user_id" : "hans",
    "cache_time" : 10,
    "description" : "Field graph",
    "id" : "534dba10-18de-43c5-898b-ff540d949537",
    "type" : "STACKED_CHART",
    "config" : {
        "timerange" : {
            "type" : "relative",
            "range" : 300
        },
        "renderer" : "line",
        "interpolation" : "linear",
        "rangeType" : "relative",
        "series" : [ 
            {
                "query" : "",
                "field" : "took_ms",
                "statistical_function" : "mean"
            }, 
            {
                "query" : "",
                "field" : "took_ms",
                "statistical_function" : "max"
            }
        ],
        "query" : "",
        "interval" : "minute",
        "relative" : 300
    }
}

Fields rangeType, query, and relative are not needed, and should not be sent by the web interface or persisted.

Other than the redundancy and confusion, there is no impact in the Graylog server or web interface, as we use the data from timerange and series to calculate and render stacked charts.

Steps to Reproduce (for bugs)

1. Create a stacked chart
2. Add it to a dashboard while observing the network request
3. See that there are redundant fields

Your Environment

• Graylog Version: 2.4.0-SNAPSHOT