Building complete JSON in grails - json

Question

My controller looks like this:
def save() {
js {
def color = new Color(params)
color.save()
def result
if (!color.hasErrors())
{
result = [colorname: color.name, colorshde: color.shade]
}
else
{
result = "..."
}
render result as JSON
}
}
The JSON that I desire should look like this:
Successful JSON
{
"meta": {
"status": 200,
"msg": "OK"
},
"response": {
"color": {
"colorname": "Red",
"shade": "light
}
}
}
Unsuccessful response:
{
"meta": {
"status": 400,
"msg": "Something went worn"
},
"response": {
"color": {
}
}
}
Question
How can I modify the controller action to account for both scenarios while returning json?

Answer 1

For successful response:
{
"meta": {
"status": 200,
"msg": "OK"
},
"response": {
"color": {
"colorname": "Red",
"shade": "light
}
}
}
Use:
result = [meta: [status: '200', msg: 'OK'], response:[color:[colorname: color.name, colorshde: color.shade] ] ]
For unsuccessful response:
{
"meta": {
"status": 400,
"msg": "Something went worn"
},
"response": {
"color": {
}
}
}
Use
result = [meta: [status: '400', msg: 'wrong'], response:[color:[] ] ]