MappingException（检测到不明确的字段映射）与 Spring 继承字段上的数据

Question

以下结果导致 MappingException。我需要更改设计吗？

    public class Foo extends Bar {

        // if class == Foo do not send this over the wire
        @JsonProperty(access = Access.WRITE_ONLY)
        public List<X> myList;

    }

    public class Bar {

        // if class == Bar send this over the wire
        public List<X> myList;


    public void methodsThatAccessMyList() {
       // multiple methods exists in here accessing myList
       // also, other classes exist extending bar, 
       //so moving these to the children will result in duplicate code
 }
    }

但是，我需要 child class 上的 json 属性，以防止 child class 传输该字段通过电线。

我需要更改什么以防止映射不明确？

org.springframework.data.mapping.MappingException: Ambiguous field mapping detected! Both protected java.util.List ... and @com.fasterxml.jackson.annotation.JsonProperty(index=-1, access=WRITE_ONLY, value="", defaultValue="", required=false)protected java.util.List ... map to the same field name ...! Disambiguate using @Field annotation!

Answer 1

事实证明，您可以将 JsonProperty 放在字段的 getter 上，它将按预期工作。像这样，您不需要在扩展 class.

中覆盖字段本身

MappingException（检测到不明确的字段映射）与 Spring 继承字段上的数据

MappingException (Ambiguous field mapping detected) with Spring Data on inherited field

java

inheritance

jackson

spring-data

spring-data-mongodb