Filtering on nested JSON array: Rest Assured - json

Question

I am trying to filter my GET response(JSON) based on a value in a nested JSON array. For eg: In the following JSON i want to filter an JSON array and print the names of cakes using Chocolate as batter.
{
"id": "0001",
"type": "donut",
"name": "Choco Blueberry Cake",
"ppu": 0.55,
"batter":[
{ "id": "1001", "type": "Regular" },
{ "id": "1002", "type": "Chocolate" },
{ "id": "1003", "type": "Blueberry" }
]
}
I have tried something like:
List<String> chocolateCakeList =jsonPath.getList("findAll{it.batter.type=='chocolate'}.name");
and
List<String> chocolateCakeList =jsonPath.getList("findAll{it.batter.it.type=='chocolate'}.name");
Both return empty Lists.

Answer 1

Problem
First, if you want to use findAll then the object to be axtract must be an array. Your json is object {}, not an array []. Actually, your nested object batter is an array [].
keyword to search is Chocolate, not chocolate. Case-sensitive is applied here.
Solution
-If your whole response is exactly what you posted, then the path to extract is
String name = jsonPath.getString("name")
-If your response has structrure like this.
[
{
"id": "0001",
"type": "donut",
"name": "Choco Blueberry Cake",
"ppu": 0.55,
"batter": [
{
"id": "1001",
"type": "Regular"
},
{
"id": "1002",
"type": "Chocolate"
},
{
"id": "1003",
"type": "Blueberry"
}
]
},
{
"id": "0002",
"type": "donut",
"name": "Choco Blueberry Cake",
"ppu": 0.55,
"batter": [
{
"id": "1001",
"type": "Regular"
},
{
"id": "1002",
"type": "Chocolate 2"
},
{
"id": "1003",
"type": "Blueberry"
}
]
}
]
Then the extraction is
List<String> list = jsonPath.getList("findAll {it.batter.findAll {it.type == 'Chocolate'}}.name");