用jq替换基于键值对的JSON值

Question

I have a JSON with the following structure

{
   "name": "name",
   "id": [
        "abcdef"
   ],
   "input_dataobjects": [
     {
        "id": "someid1",
        "name": "somename1",
        "provider": "someprovider",
        "datatype": "somedatatype1"
    },
    {
        "name": "some_name2",
        "datatype": "some_datatype2",
        "id": "some_id2"
    }
  ]
}

What I am trying to achieve

in input_dataobjects if datatype == somedatatype1 then name = sonemewname1 .

I can use the index of the input_dataobjects since my json always has the same structure. But is there any different way to achieve it by parsing through the input_dataobjects and find the index to replace? I am using jq to do JSON operations.

I tried with using the index like .input_dataobjects[0].name="someting" because i know the position of the datatype always.

Answer 1

The simplest and perhaps most efficient solution to the problem as stated is:

.input_dataobjects |=
  map( if .datatype == "somedatatype1"
       then .name = "sonemewname1"
       else . end )

Answer 2

here's an alternative solution based on jtc unix utility:

If I understand your question right, you'd like to match datatype== somedatatype1 and if matches, then update the top name with the name sibling of datatype ?

if so, then solution based on jtc looks like this:

bash $ <file.json jtc -w'[name]' -u'[datatype]:<somedatatype1>[-1][name]'
{
   "id": [
      "abcdef"
   ],
   "input_dataobjects": [
      {
         "datatype": "somedatatype1",
         "id": "someid1",
         "name": "somename1",
         "provider": "someprovider"
      },
      {
         "datatype": "some_datatype2",
         "id": "some_id2",
         "name": "some_name2"
      }
   ],
   "name": "somename1"
}
bash $ 

If, you just like to update/alter a sibling name of the record, then run like this:

bash $ <file.json jtc -w'[datatype]:<somedatatype1>[-1][name]' -u'"sonemewname1"'
{
   "id": [
      "abcdef"
   ],
   "input_dataobjects": [
      {
         "datatype": "somedatatype1",
         "id": "someid1",
         "name": "sonemewname1",
         "provider": "someprovider"
      },
      {
         "datatype": "some_datatype2",
         "id": "some_id2",
         "name": "some_name2"
      }
   ],
   "name": "name"
}
bash $ 

here's the jtc comprehensive user guide