Generate JSON With JSON-Views - json

Question

I am trying to use JSON-Views in Grails 3.1.
I have the following controller:
package myapp
BasketController {
def index(ProductFilterCommand cmd) {
[basketList: service.findAllBaskets()]
}
}
And the following classes:
package myapp
class Basket {
List<BasketItem> items
}
class BasketItem {
String name
}
Here are the gson files which I thought would work:
basket/index.gson
import myapp.Basket
model {
Iterable<Basket> basketList
}
json.baskets(basketList) {
g.render(template: "basket", model: [basket: it])
}
basket/_basket.gson
import myapp.Basket
model {
Basket basket
}
json.items(basket.items) {
g.render(template: "item", model:[item: it])
}
basket/_item.gson
import myapp.Item
model {
Item item
}
json g.render(item)
I want to generate json such as:
{
"baskets": [{
"items": [{
"name": "T-shirt"
}, {
"name": "Pants"
}]
}, {
"items": [{
"name": "T-shirt"
}, {
"name": "Pants"
}]
}]
}
But instead I am getting:
{
"baskets": [
{},
{}
]
}

Answer 1

Looks like a bug to me. The only way to achieve what you are looking for is to use the views as shown below. Also note the usage of collection instead of model. I would file a bug with the sample app I used to test below.
Note the usage of template as a fully qualified name basket/item. This is the
defect.
//index.gson
import com.example.Basket
model {
Iterable<Basket> basketItems
}
json {
baskets g.render(template: 'basket', collection: basketItems, var: 'basket')
}
//_basket.gson
import com.example.Basket
model {
Basket basket
}
json {
items g.render(template: "basket/item", collection: basket.items, var: 'item')
}
//_item.gson
import com.example.BasketItem
model {
BasketItem item
}
json g.render(item)
//or if id is not required in response
/*json {
name item.name
}*/