json - 如何使用jq在JSON对象中的指定键后插入键值对？

Question

我有一个像这样的 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”之间，所以我想要的结果应该如下所示:

{
    "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使用

将其附加到文件末尾

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

但这不是我想要的，我想将它插入到另外两个键之间。我该如何使用 jq 命令来做到这一点？

Answer 1

最简单的方法是使用 to_entries 将 .hierarchy.struct 转换为数组，执行插入，然后使用 from_entries重构对象，按照以下方式:

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

如果可能找不到定义插入点的项目，当然需要修改上面的草图。

indexof/1

这里有一个有用的“def”，用于查找满足某些条件的最小索引:

# 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的解决方案

将以上部分放在一起:

{"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)