How do I use java.time.LocalDate on JSON Rests?

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Frederico Ferrao

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Sep 30, 2015, 4:48:44 PM9/30/15

to play-framework

Hey guys,

I'm having problem trying to use java.time.LocalDate on my model

@Entity
    public class Person extends Model {

        @Id
        public Long id;

        public String name;

        public LocalDate dayOfBirth;

        @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd/MM/yyyy")
        public LocalDate anotherDate;

        @Formats.DateTime(pattern = "dd/MM/yyyy")
        public LocalDate andAnotherOne;

        public static Model.Finder<Long, Person> find = new Model.Finder<Long, Person>(Person.class);
    }

Controller:

public class PersonController extends Controller {

        public Result create() {
            Person person = Json.fromJson(request().body().asJson(), Person.class);

            person.save();

            return ok(Json.toJson(person));
        }

        public Result all() {
            return ok(Json.toJson(Person.find.all()));
        }

jackson cant instantiate LocalDate:

java.lang.RuntimeException:     com.fasterxml.jackson.databind.JsonMappingException: Can not instantiate     value of type [simple type, class java.time.LocalDate] from String value     ('2015-09-30'); no single-String constructor/factory method
 at [Source: N/A; line: -1, column: -1] (through reference chain:     models.Person["dayOfBirth"])

What am I missing?

question on stackoverflow: http://stackoverflow.com/questions/32872474/how-to-use-java-time-localdate-on-a-play-framework-json-rest

sample: https://github.com/fredferrao/LocalDateJSONTest

Thanks

Frederico Ferrao

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Oct 1, 2015, 11:20:58 AM10/1/15

to play-framework

I found the problem and a workaround.

Opened an issue on github with details: https://github.com/playframework/playframework/issues/5140

workaround is to register the properly modules on Global.java

public class Global extends GlobalSettings {
    public void onStart(Application app) {
        ObjectMapper mapper = new ObjectMapper();
        mapper.registerModule(new Jdk8Module());
        mapper.registerModule(new JSR310Module());
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        Json.setObjectMapper(mapper);
    }
}

On Wednesday, September 30, 2015 at 4:48:44 PM UTC-4, Frederico Ferrao wrote:

Hey guys,

I'm having problem trying to use java.time.LocalDate on my model

@Entity public class Person extends Model { @Id public Long id; public String name; public LocalDate dayOfBirth; @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd/MM/yyyy") public LocalDate anotherDate; @Formats.DateTime(pattern = "dd/MM/yyyy") public LocalDate andAnotherOne; public static Model.Finder<Long, Person> find = new Model.Finder<Long, Person>(Person.class); }

Controller:
public class PersonController extends Controller { public Result create() { Person person = Json.fromJson(request().body().asJson(), Person.class); person.save(); return ok(

@Entity
	public class Person extends Model {

	@Id
	public Long id;

	public String name;

	public LocalDate dayOfBirth;

	@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd/MM/yyyy")
	public LocalDate anotherDate;

	@Formats.DateTime(pattern = "dd/MM/yyyy")
	public LocalDate andAnotherOne;

	public static Model.Finder<Long, Person> find = new Model.Finder<Long, Person>(Person.class);
	}

public class PersonController extends Controller {

	public Result create() {
	Person person = Json.fromJson(request().body().asJson(), Person.class);

	person.save();

	return ok(Json.toJson(person));
	}

	public Result all() {
	return ok(Json.toJson(Person.find.all()));
	}