如何使用 jq 将哈希数组 JSON 输入的数组的哈希转换为 CSV？

Question

我要转换存储在文件中的以下JSON内容input.json

{
    "results": [
        [
           {
               "field": "field1",
               "value": "value1-1"
           },
           {
               "field": "field2",
               "value": "value1-2"
           },
           {
               "field": "field3",
               "value": "value1-3"
           }
        ],
        [
           {
               "field": "field1",
               "value": "value2-1"
           },
           {
               "field": "field2",
               "value": "value2-2"
           },
           {
               "field": "field3",
               "value": "value2-3"
           }
        ],
        [
           {
               "field": "field1",
               "value": "value3-1"
           },
           {
               "field": "field2",
               "value": "value3-2"
           },
           {
               "field": "field3",
               "value": "value3-3"
           }
        ]
    ]
}

转换为 CSV 输出

"field1","field2","field3"
"value1-1","value1-2","value1-3"
"value2-1","value2-2","value2-3"
"value3-1","value3-2","value3-3"

我想出的最接近的 jq 表达式是这样的：

$ cat input.json | jq -r '.results | .[] | map(.field), map(.value) | @csv'
"field1","field2","field3"
"value1-1","value1-2","value1-3"
"field1","field2","field3"
"value2-1","value2-2","value2-3"
"field1","field2","field3"
"value3-1","value3-2","value3-3"

这仍然不正确。我应该如何编写 jq 表达式以获得所需的 CSV 输出？

Answer 1

您正在将 .[] 喂入 map(.field) 以及 map(.value)。

仅对 first 项使用 map(.field)，对所有项使用 map(.value) .[]:

jq -r '.results | (first | map(.field)), (.[] | map(.value)) | @csv' input.json

Demo

如何使用 jq 将哈希数组 JSON 输入的数组的哈希转换为 CSV？

How to convert a hash of an array of array of hashes JSON input into CSV using jq?

bash

json

export-to-csv

jq