通過 jq 過濾器將 Json 轉換為 CSV

Question

我有一個包含此內容的 json 文件，並希望將其轉換為 CSV，如下所示：

{
  "fields": [
    {
      "id": 17,
      "name": "Business Division",
      "values": [
        {
          "id": 131,
          "name": "Accounting",
          "industry": [
            "Accounting"
          ]
        }
      ]
    },
    {
      "id": 16,
      "name": "Cancellation Reason",
      "values": [
        {
          "id": 114,
          "name": "Forgot"
        }
      ]
    }
  ]
}

CSV 文件格式：

17,Business Division,131,Accounting,Accounting
16,Cancellation Reason,114,Forgot

我在終端上運行了這個命令：

jq -M -r -f industry.jq source.json |tr -d '"' >source.csv

這是用作過濾器的行業.jq 文件的內容：

.fields[] 
| .values[] as $e
| $e.industry[]? as $s
| [.id, .name, $e.id, $e.name, $s? ]
| @csv

As result, the second line of the CSV file did not print I think it's because of the.industry[] object that did not available in the second object in my Json

如何以所需格式打印上述 json？

Answer 1

.fields[] | [ .id, .name, .values[].id, .values[].name, .values[].industry[]? ] | @csv

會產生

17,"Business Division",131,"Accounting","Accounting"
16,"Cancellation Reason",114,"Forgot"

當像這樣調用時：

jq --raw-output '.fields[] | [ .id, .name, .values[].id, .values[].name, .values[].industry[]? ] | @csv'

---

后面會加入多個行業

---

在線嘗試

Answer 2

我會使用try... catch...使默認值顯式，例如

(try $e.industry[] catch null) as $s