JMESPath-在嵌套数组中连接项目 [英] JMESPath - Joining items in a nested array

问题描述

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"
        }
    ]
  }
}

我需要将其重组为此

{
"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

I could make this work with a specific array index

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

产生此结果

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

我以两种方式尝试了不使用数组索引的情况

I tried this without array index in two ways

此

 {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])}

但这没有帮助.

有关如何解决此问题的任何提示?

Any tips on how this can be solved?

推荐答案

您需要将该函数应用于数组的每个元素，并通过@

You need to apply the function to each element of the array and access the current node via @

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

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

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