jmespath - JMESPath - 连接嵌套数组中的项目

Question

我有一个 JSON

{
"key": "processId-29231",
"fields": {
    "attachment": [
        {
            "id": "79572",
            "filename": "File1.png"
        },
        {
            "id": "74620",
            "filename": "File2.docx"
        },
        {
            "id": "79072",
            "filename": "File3.xlsx"
        }
    ]
  }
}

我需要将其重组为

{
"processId": "processId-29231",
"attachments": [

               "https://example.com/files/79572/File1.png",
               "https://example.com/files/79572/File2.docx",
               "https://example.com/files/79572/File1.xlsx",
                ]
    }

我可以使用特定的数组索引来完成这项工作

{processID:key,attachments:join('',['https://example.com/files/',fields.attachment[1].id,'/',fields.attachment[1].filename])}

产生这个结果

{
 "processID": "processId-29231",
 "attachments": "https://example.com/files/74620/File2.docx"
}

我在没有数组索引的情况下尝试了两种方式

这

 {processID:key,attachments:join('',['https://example.com/',fields.attachment[].id,'/',fields.attachment[].filename])}

还有这个

{processID:key,attachments:join('', ['https://example.com/',fields.attachment[*].id,'/',fields.attachment[*].filename])}

但这并没有帮助。

关于如何解决这个问题的任何提示？

Answer 1

您需要将该函数应用于数组的每个元素并通过以下方式访问当前节点@

{processID:key,attachments: fields.attachment[].join('',['https://example.com/files/', @.id, '/', @.filename])}

http://jmespath.org/specification.html#functions