Use @JsonView to exclude (like @JsonIgnore) with play frameworks default json writer?

Question

It seems you can\'t mix @JsonIgnore and @JsonView. I want to hide a field by default, but show it in some cases.

Basically I\'ve got this setup :-

class         


        

Answer 1

You may try JsonFilter in your child class you need to add this annotation @JsonFilter("myFilter")

@JsonFilter("myFilter")     // myFilter is the name of the filter, you can give your own.
class Child extends Model {

  public Long id;
  public String secret;
}

ObjectMapper mapper = new ObjectMapper();

/* Following will add filter to serialize all fields except the specified fieldname and use the same filter name which used in annotation.
   If you want to ignore multiple fields then you can pass Set<String> */

FilterProvider filterProvider = new SimpleFilterProvider().addFilter("myFilter",SimpleBeanPropertyFilter.serializeAllExcept("secret"));
mapper.setFilters(filterProvider);

try {
    String json = mapper.writeValueAsString(child);    
} catch (JsonProcessingException e) {
    Logger.error("JsonProcessingException ::: ",e);
}

If you dont want to ignore any field then, just pass empty string `SimpleBeanPropertyFilter.serializeAllExcept("")`

Answer 2

Once you have an object mapper, you can effectively use it in the same way as you are currently using play.libs.Json.toJson(parent), and get exactly what you want.

So whenever you were previously using play.libs.Json.toJson(parent), just use new ObjectMapper().writeValueAsString() and you won't get your secret.