Spring DataRest Projection returning only id for nexted objects

Question

I've a problem with spring datarest where for a projection defined as below, when the farmer id is same a cocoonlot, instead of returning farmer object, it returns only id. For the first occurance of farmer with a id, object is returned, all other occurances are only id.

@Projection(name = "customCocoonlot", types = { CocoonLot.class })
public interface CustomCocoonlot {

    @Value("#{target}")
    public CocoonLot getCocoonLot();

    @Value("#{target.getFarmerPayout()}")
    public FarmerPayout getFarmerPayout();
    
    @Value("#{target.getFarmer()}")
    public Farmer getFarmer();
}

What I get is below for a sample data:

        "cocoonlot": [
            {
                "cocoonLot": {
                    "id": 19,
                    "grade": 6.0,
                    "lotWeight": 1.0,
                    "pricePerKg": 360.0
                },
                "farmer": {
                    "id": 10,
                    "phone": "9999999999",
                    "name": "Test Farmer",
                }
            },
            {
                "cocoonLot": {
                    "id": 20,
                    "grade": 6.0,
                    "lotWeight": 2.0,
                    "pricePerKg": 360.0
                },
                "farmer": 10  --> ISSUE HERE
            }
        ]

But whats expected is something like below:

 "cocoonlot": [
            {
                "cocoonLot": {
                    "id": 19,
                    "grade": 6.0,
                    "lotWeight": 1.0,
                    "pricePerKg": 360.0
                },
                "farmer": {
                    "id": 10,
                    "phone": "9999999999",
                    "name": "Test Farmer",
                }
            },
            {
                "cocoonLot": {
                    "id": 20,
                    "grade": 6.0,
                    "lotWeight": 2.0,
                    "pricePerKg": 360.0
                },
                "farmer": {
                    "id": 10,
                    "phone": "9999999999",
                    "name": "Test Farmer",
                }
            }
        ]

question from:https://stackoverflow.com/questions/65890813/spring-datarest-projection-returning-only-id-for-nexted-objects

Answer 1

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