Question 109474 in Json Question posted in
Our archive of expertly curated questions and answers provides insights and solutions to common problems related to this popular data interchange format. From parsing and manipulating JSON data to integrating it with various programming languages and web services, our archive has got you covered. Start exploring today and take your JSON skills to the next level

Json – JOLT concatenate ONLY if not NULL

I need to change a date from YEAR to a fixed YYYY-MM-DD only if the value of the year is not null.

At the moment I have this

[
  {
    "operation": "modify-overwrite-beta",
    "spec": {
      "Passing?": "=concat(@(1,Passing),-01-01'"
    }
  }
]

Input:

{
  "Passing": "2022",
  "Comments": "NotMentioned",
  "Team": "2",
  "modified_date": "2023-01-27 13:41:39",
  "Profile": "DM",
  "JobRole": "Tester"
}

And the Output I’ll like is

{
  "Passing": "2022-01-01",
  "Comments": "NotMentioned",
  "Team": "2",
  "modified_date": "2023-01-27 13:41:39",
  "Profile": "DM",
  "JobRole": "Tester"
}

This is currently working fine but when I have a null value in Passing i get this, that I want to avoid.

{
  "Passing": "null-01-01",
  "Comments": "NotMentioned",
  "Team": "2",
  "modified_date": "2023-01-27 13:41:39",
  "Profile": "DM",
  "JobRole": "Tester"
}

I need to keep the "Passing" equal to "null" if there is no year in it.

Tags:

2

Answers


  1. 0

    I don’t know what your Passing value is if it’s not null, But you can use the below spec if you want to achieve to your desired output.

    Spec:

    [
  {
    "operation": "modify-overwrite-beta",
    "spec": {
      "Passing": "=concat(@(1,Passing),'-01-01')"
    }
  },
  {
    "operation": "shift",
    "spec": {
      "*": "&",
      "Passing": {
        "-*": {
          "@": "&2"
        },
        "*": {
          "@1": "&2"
        }
      }
    }
  }
]

    If Passing is null, you get null.

    If Passing is 2023, you get 2023-01-01

    Login or Signup to reply.
  2. 0

    The suffixing ? operator of Passing attribute checks out for the existence, not for nullability.

    You rather can use isNull function within a modify transformation spec in order to check the condition such as

    [
  {
    "operation": "modify-overwrite-beta",
    "spec": {
      "Passing": ["=isNull", "=concat(@(1,&),'-01-01')"]// the value is overwritten provided the Passing has a non-null value
    }
  }
]

    where @(1,&) replicates the current value of the attribute Passing

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search