CODEWITHSUNDEEP
javajsonjackson
Himanshu Yadav
Himanshu Yadav

Reputation: 13585

JSON: UnrecognizedPropertyException for List of child objects

It seems to be a straightforward implementation but somehow not working for me.

public class ParentEntity {

   private List<ChildEntity> childFields;

   public List<ChildEntity> getChildFields() {
      return childFields;
   }

   public void setChildFields(List<ChildEntity> childFields) {
     this.childFields = childFields;
   }

}

Input JSON

{
 "childFields": [
     {<different child properties>},
     {<different child properties>}
  ]
}

Exception

class ChildEntity not marked as ignorable (11 known properties:...different child field properties

Upvotes: 0

Views: 212

Answers (1)

Mathias G.
Mathias G.

Reputation: 5085

Regarding the exception message that you added, you have a mismatch in the properties you specified in your JSON for the ChildEntity and the ChildEntity properties.

If you have a mismatch and you want to specify more properties in JSON, than available in the ChildEntity class, you can use Jackson's

@JsonIgnoreProperties

annotation. It will ignore every property you haven't defined in your POJO.

You could also choose to use:

ObjectMapper objectMapper = getObjectMapper();
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

It will ignore all the properties that are not declared.

Upvotes: 1

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