如何使用jq在JSON對象中的指定鍵之后插入鍵值對？

Question

我有一個像這樣的JSON文件

{
    "hierarchy": {
        "structure": {
            "card_11001": [
                "addCard_4111"
            ],
            "container_11006": [
                "mainContainer_11007",
                "subContainer_10016"
            ],
            "mainContainer_11007": [
                "paymentMethodList_10001"
            ],
            "orderWrap_10012": [
                "orderSummary_10005"
            ],
            "paymentMethodList_10001": [
                "card_11001",
                "placeOrder_10013"
            ],
            "root_10000": [
                "payNotice_11011",
                "payNotice_10020",
                "container_11006",
                "placeOrderResultAction_10004"
            ],
            "subContainer_10016": [
                "orderWrap_10012",
                "footer_10014"
            ]
        }
    }
}

我想插入

"offline_11018": [
    "instruction_908",
    "checkboxList_11019"
]

在"mainContainer_11007"和"orderWrap_10012" ，因此我想要的結果應如下所示：

{
    "hierarchy": {
        "structure": {
            "card_11001": [
                "addCard_4111"
            ],
            "container_11006": [
                "mainContainer_11007",
                "subContainer_10016"
            ],
            "mainContainer_11007": [
                "paymentMethodList_10001"
            ],
            "offline_11018": [
                "instruction_908",
                "checkboxList_11019"
            ],
            "orderWrap_10012": [
                "orderSummary_10005"
            ],
            "paymentMethodList_10001": [
                "card_11001",
                "placeOrder_10013"
            ],
            "root_10000": [
                "payNotice_11011",
                "payNotice_10020",
                "container_11006",
                "placeOrderResultAction_10004"
            ],
            "subContainer_10016": [
                "orderWrap_10012",
                "footer_10014"
            ]
        }
    }
}

我所知道的是，我只能將其附加到文件末尾

jq --raw-output '.hierarchy.structure + {"offline_11018": ["instruction_908","checkboxList_11019"]}'

但這不是我想要的，我想在其他兩個鍵之間插入它。 我該如何使用jq命令？

Answer 1

最簡單的方法是使用to_entries將.hierarchy.structure轉換為數組，執行插入，然后使用from_entries來重構對象，方法如下：

.hierarchy.structure |= (to_entries
  | ... as $ix
  | .[:$ix] + ($x | to_entries) + .[$ix:]
  | from_entries)

如果可能找不到定義插入點的項目，則當然需要修改以上草圖。

indexof/1

這是一個有用的“ def”，用於查找滿足某些條件的最小索引：

# If the input is an array, emit the least index, $i, 
# for which `.[$i]|f` is truthy, otherwise emit null.
# Works similarly if the input is a JSON object.
def indexof(f):
  label $out
  | foreach .[] as $x (null; .+1;
      if ($x|f) then (.-1, break $out) else empty end) // null;

使用indexof解決方案

將以上各部分放在一起：

{"offline_11018": [ "instruction_908", "checkboxList_11019" ]} as $x
| .hierarchy.structure |= (to_entries
    | (1 + indexof( .value | index("mainContainer_11007") )) as $ix
    | .[:$ix] + ($x | to_entries) + .[$ix:]
    | from_entries)