将'key_as_string'添加到elasticsearch / searchkick聚合结果

Question

在我的搜索中，我有这个：

body_options: { 
    aggs: { 
        expenditure: { 
            terms: { 
                field: "parent_id"
            },
        aggs: { 
            wbs: { 
                terms: { 
                    field: "wbs_item_id"
                }, 
                aggs: {
                        "committed": {
                            "sum": {
                                "field": "committed"
                            }
                        },
                        "invoiced_against": {
                            "sum": {
                                "field": "committed_accrued"
                            }
                        }
                    }
                }
            }
        }
    }
}

这是我的结果：

"buckets" => [{
    "key" => 6, "doc_count" => 3, "committed" => {
        "value" => 6123.0
    }, "invoiced_against" => {
        "value" => 999.0
    }
}, {
    "key" => 7, "doc_count" => 3, "committed" => {
        "value" => 0.15585599975585938e4
    }, "invoiced_against" => {
        "value" => 500.0
    }
}, {
    "key" => 4, "doc_count" => 1, "committed" => {
        "value" => 0.0
    }, "invoiced_against" => {
        "value" => 452.0
    }
}, {
    "key" => 5, "doc_count" => 1, "committed" => {
        "value" => 0.0
    }, "invoiced_against" => {
        "value" => 452.0
    }
}]

我在一些站点上看到了'key_as_string'，在我自己的布尔值结果中（添加了true / false）。我已经读过它是为了允许人们阅读密钥的版本而添加的。可以将其添加到ES / SK结果中吗？