Using custom serializer embeds returned values in content key

Question

I'm extending JsonSerializer to override it's serialize method like so:

public class UserSerializer extends JsonSerializer<User> {
    @Override
    public void serialize(User user, JsonGenerator jsonGenerator,
                      SerializerProvider serializerProvider) throws IOException, JsonProcessingException {
        jsonGenerator.writeStartObject();
        jsonGenerator.writeObjectField("timestamp", user.getTimestamp());
        jsonGenerator.writeStringField("caption", user.getCaption());
        jsonGenerator.writeEndObject();
    }
}

User is defined as such:

@JsonSerialize(using = UserSerializer.class)
@Document
public class User {

    @NotNull
    @Id
    private String id;

    @NotNull
    private Date timestamp;

    private String caption;

    public Date getTimestamp() {
        return timestamp;
    }

    public String getCaption() {
        return caption;
    }

    public void setCaption(String caption) {
        this.caption = caption;
    }

    public void setTimestamp(Date timestamp) {
      this.timestamp = timestamp;
    }
}

And I'm calling the following controller method, in order for it to return the users:

@RequestMapping(value = "/users", method = RequestMethod.GET)
public ResponseEntity<PagedResources<User>> findAll(Pageable pageable) {
    Page<User> results = userService.findAll(pageable);
    return new ResponseEntity(pagedAssembler.toResource(results), HttpStatus.OK);
}

But it returns the paged content like:

{
"_embedded" : {
    "users" : [ {
      "content" : {
        "timestamp" : "2016-02-07T21:32:22.830+0000",
        "caption" : "hi"
      }
    } ]
  },
  "_links" : {
    "self" : {
      "href" : "http://localhost:8080/....."
    }
  },
  "page" : {
    "size" : 5,
    "totalElements" : 1,
    "totalPages" : 1,
    "number" : 0
  }
}

As you can see, the returned data is inside a "content" key. I don't want this to happen, how can I make the data appear embedded in the "users" key? (This is the default when not overriding the serialize method)

Can you show your user class and also parent class and probably how you register your serializer? Because if you register your serializer correctly and parent class looks like `OuterObject{ public User[] users;}` your serializer should work just fine. — varren, Apr 17 '16 at 12:33
@varren updated. There isn't a parent class as such, I'm just calling the controller method, which performs a findAll in the user mongo repository. — Tometoyou, Apr 17 '16 at 12:46
Ahh hold on, I may have struck gold. Someone has had the same thing as me, I'll check out the answer and update on here if it works: http://stackoverflow.com/questions/22613143/different-json-output-when-using-custom-json-serializer-in-spring-data-rest — Tometoyou, Apr 17 '16 at 12:50

Using custom serializer embeds returned values in content key

0 Answers0