Question 136951 in Json Question posted in
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How to convert string that represent json value to json

I have a string field that represents JSON value

{ "value": "[{"field_1": "123","field_2": "id","field_3": "qwe"}]" }

Is there a way in jolt to convert it to JSON, something like this

{ "value": [{"field_1": "123","field_2": "id","field_3": "qwe"}] }

I know format of objects in array, there always will be only three fields with same names, but the number of objects can vary

Also i wounder is there a way to do the opposite thing, like convert array to string

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2

Answers


  1. 0

    { "value": "[{"field_1": "123","field_2": "id"}]" }
    you can try this text , because your text missing a character " { "

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  2. 0

    You can use successive split and join functions as in the following specification considering the fact

    there always will be only three fields with same names, but the number of objects can vary :

    [
  { // generate an array, namely "value", with contents of each array which are purified from " characters
    "operation": "modify-overwrite-beta",
    "spec": {
      "val_0": "=split(",@(1,value))",
      "val_1": "=join('',@(1,val_0))",
      "val_2": "=split('\[\{',@(1,val_1))",
      "val_3": "=join('',@(1,val_2))",
      "val_4": "=split('\}\]',@(1,val_3))",
      "val_5": "=join('',@(1,val_4))",
      "value": "=split('\},\{',@(1,val_5))"
    }
  },
  { // dissipate each components of the "value" array to form a new array of objects
    "operation": "shift",
    "spec": {
      "value": {
        "*": {
          "@": "[&1].val"
        }
      }
    }
  },
  { // make "value" array with key-value-key-value-key-value ordered components 
    "operation": "modify-overwrite-beta",
    "spec": {
      "*": {
        "v": "=split(',',@(1,val))",
        "val": "=join(':',@(1,v))",
        "value": "=split(':',@(1,val))"
      }
    }
  },
  {
    "operation": "shift",
    "spec": {
      "*": {
        "@(0,value[1])": "[#2].@(1,value[0])", // represents the key-value pair for "field_1"
        "@(0,value[3])": "[#2].@(1,value[2])", // represents the key-value pair for "field_2"
        "@(0,value[5])": "[#2].@(1,value[4])" // represents the key-value pair for "field_3"
      }
    }
  },
  { // get rid of the leading whitespaces of the values
    "operation": "modify-overwrite-beta",
    "spec": {
      "*": {
        "*": "=trim"
      }
    }
  }
]
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