How to create json array and values using Groovy jsonBiulder - groovy

Question

trying to create the below json structure with groovy jsonBuilder in jmeter using JSR223 sampler
{
"Catalogues":[
{
"Catalogue":{
"itemName":"XYZ",
"Level":"Class1",
"Color":"Orange",
"Id":"232f2d6820822840"
},
"sales":[
[
"7:19 PM 3-31-2022",
"gadfma53742w3585657er43"
],
[
"5:02 PM 3-30-2022",
"iytyvh53742w3585657er41"
]
]
}
]
}
I have tried the below groovy script
def json = new groovy.json.JsonBuilder()
json {
Catalogues(
[{
Catalogue {
itemName('XYZ')
Level('Class1')
Color('Orange')
Id('232f2d6820822840')
},
{
sales(
('7:19 PM 3-31-2022'), ('gadfma53742w3585657er43')
)
}
}]
)
}
log.info '\n\n\n' + json.toPrettyString() + '\n\n\n'
Output:
{
"Catalogues":[
{
"Catalogue":[
{
"itemName":"XYZ",
"Level":"Class1",
"Color":"Orange",
"Id":"232f2d6820822840"
},
{
"sales":[
"7:19 PM 3-31-2022",
"gadfma53742w3585657er43"
]
}
]
}
]
}
Problems:
If I remove the '{' before sales and after (at corresponding location), it adds sales values into catalogue
unable to include second set of sales values

Answer 1

I'm suggesting another way to use builder because it's easier to understand.
To declare array in groovy use [1, 2, 3]
To declare map [a:1, b:2, c:3]
So, if you replace in original json { to [ - you will get valid groovy object that corresponds to parsed json
def data = [
"Catalogues":[
[
"Catalogue":[
"itemName":"XYZ",
"Level":"Class1",
"Color":"Orange",
"Id":"232f2d6820822840"
},
"sales":[
[
"7:19 PM 3-31-2022",
"gadfma53742w3585657er43"
],
[
"5:02 PM 3-30-2022",
"iytyvh53742w3585657er41"
]
]
]
]
]
//then you could convert it to json:
def json = new groovy.json.JsonBuilder(data).toPrettyString()
log.info(json)

Answer 2

JsonBuilder translates Map to JSON Object and List to JSON Array
So I would recommend for better readability and clarity amending your code to look like:
def body = [:]
def Catalogues = []
def Catalogue = [:]
def entry = [:]
Catalogue.put('itemName', 'XYZ')
Catalogue.put('Level', 'Class1')
Catalogue.put('Color', 'Orange')
Catalogue.put('Id', '232f2d6820822840')
def sales = []
sales.add(['7:19 PM 3-31-2022', 'gadfma53742w3585657er43'])
sales.add(['5:02 PM 3-30-2022', 'iytyvh53742w3585657er41'])
entry.put('Catalogue', Catalogue)
entry.put('sales', sales)
Catalogues.add(entry)
body.put('Catalogues', Catalogues)
def json = new groovy.json.JsonBuilder(body)
More information:
JsonBuilder
Apache Groovy - Parsing and producing JSON
Apache Groovy - Why and How You Should Use It