Spring DataRest Projection 仅返回下一个对象的 id

Question

我对 spring datarest 有问题，对于如下定义的投影，当农民 id 与 cocoonlot 相同时，而不是返回农民 object，它只返回 id。 对于第一次出现的有 id 的农民，返回 object，所有其他出现的只有 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();
}

我得到的示例数据如下：

        "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
            }
        ]

但预期如下：

 "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",
                }
            }
        ]