How to parse JSON value using User Defined Function

Low-code
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#1

In the previous post, we have seen implementing User defined functions using login API.

Let’s check how to parse JSON value using User Defined Function.

Example

  • Use parseJSON function as a Groovy function to parse a JSON and store the values in an object.
  • The object returned from the parseJSON is a JsonNode. (from JsonNode (jackson-databind 2.7.0 API))
  • Use any of the methods in the above docs on the object to extract or manipulate the JSON before returning it.
  • parseStudentData function below parses the student data in a JSON format.
type Query {
parseStudentData(value: String): Json @tan(type:Groovy, inline: """return parseJSON(value)""")
}

Let’s execute the function!

{
  parseStudentData(
    value: "{\"Student\":{\"Name\": \"Hypi\",\"url\": \"https://hypi.io\"}}"
  )
}
#result
{
  "data": {
    "parseStudentData": {
      "Student": {
        "Name": "Hypi",
        "url": "https://hypi.io"
      }
    }
  }
}