Grails Creating JSON format output - json

Question

I'm writing a Grails web app to take the input data below and reformat it into the output format below that then can be used to draw fancyTree view. I created a controller class with the code shown in the except that follows.
How can I iterate through to make the format like the output format shown below? I looked at how Groovy does each syntax but how can I use it to add ingredients?
code excerpt:
def list(){
def results = recipies.list()
def recipiesContents = [:] //Test List
recipiesContents=[]
for (record in results){
test.add([folder:true, title: results.Name, key: results.key
])
}
//render response types
withFormat {
html test
json {render test as JSON}
xml {render test as XML}
}
}
Input data:
{
recipies :[
{key: "1",
category:"Tuna Sandwich"
data:[{some data}],
ingredients: [
{item_name:"mayo",
brand: "My Own Brand"
},
{
item_name: "Tuna".
brand: "Bumble Bee"
}
]},
{key: "2",
category:"Chicken Noodle Soup"
data:[{some data}],
ingredients: [
{item_name:"condensed chicken soup",
brand: "Campbell"
},
{
item_name: "Noodles".
brand: "Top Ramen"
}
]}
]
}
output data:
[
{
title: "Tuna Sandwich"
ingredients: [
{title: "Tuna"},
{title: "mayo"}
]
},
{
title: "Chicken Noodle Soup",
ingredients: [
{title: "condensed chicken soup"},
{title: "Noodles"}
]
}
]

Answer 1

Have you tried:
for (record in results){
def ingredients = [:]
for (ingredient in record.ingredients) {
ingredients.add([title: ingredient.item_name)
}
test.add([title: results.category, ingredients: ingredients
])
}