Parsing json in json Groovy Katalon Studio - json

Question

I got a JSON text which I should parse, but for some reason I can't parse it because it has another array inside. My JSON looks like that:
{
"statementId": "1",
"movements": [
{
"id": 65,
"date": "2019-02-05",
"number": 32,
"balance": -4.62,
"purpose": "1"
},
{
"id": 1,
"date": "2019-02-05",
"number": 22,
"balance": -3,
"purpose": "23"
},
{
"id": 32,
"date": "2019-02-05",
"number": 12,
"balance": -11,
"purpose": "2"
}
],
"startPointer": "1122",
"endPointer": "3333"
}
I am using JsonSlurper. I want to know if it is possible to catch all the data inside "movements", I have tried to use this script:
JsonSlurper slurper = new JsonSlurper()
Map parsedJson = slurper.parseText(bodyContent)
String parsed_movements = parsedJson["movements"]
I have no problem with parsing single strings, like statementId or startPointer, but when I try to parse movements with my script it gives me result as null. I have also tried parsedJson["movements"][0] to catch first movement but it also gives me an error.
I have found a lot of things about json parsers on internet and also on stackoverflow but nothing what I seek. I really don't think that it is a duplicate question.
EDIT: I tried for statement also to put each object in array like that:
def movements_array = []
for(def i = 0; i < parsedJson.movements.size(); i++) {
movements_array << parsedJson.movements[i].id
println(movements_array)
}
But it gives me an error: Cannot invoke method size() on null object, because parsedJson.movements is null.

Answer 1

When you do:
String parsed_movements = parsedJson["movements"]
You're sticking a map into a String, which isn't what you want.
Given the json in your question, you can just do
def movementIds = new JsonSlurper().parseText(bodyContents).movements.id
To get a list of [65, 1, 32]
If you're getting NPEs I assume the json isn't what you show in the question