LoganSquare not including field name on generated Json

Question

I have a class DbRecord

public class DbRecord {


    @JsonField(name="on_duties")
    List<OnDutyElement> onDuties;

    @JsonField(name = "date_time")
    DateTime dateTime;

When I try to serialize an object of this class, the LoganSquare doesn't include the dateTime field.

Generated JSON: {:"2015-12-21T11:32:17.503-05:00","on_duties":[{...everything normal from here

Answer 1

Probably, there is a bug. Write your own TypeConverter that extends DateTypeConverter, override serialize() method explicit pass writeFieldName with value true.

This will force the type converter write field name to the writer.

Answer 2

If all JSON Field names are lowercase with underscore you can define fieldNamingPolicy like that.

@JsonObject(fieldNamingPolicy = JsonObject.FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
public class DbRecord {


@JsonField
List<OnDutyElement> onDuties;

@JsonField
DateTime dateTime;

You need also to have TypeConverter for DateTime if you haven't done that already, LoganSquare allows you now to define the TypeConverter in the JsonField Annotation like that

 @JsonField(typeConverter = DateTimeConverter.class)
DateTime time;

and the DateTimeConverter

public class DateTimeConverter implements TypeConverter<DateTime> {
@Override
public DateTime parse(JsonParser jsonParser) throws IOException {
    String dateString = jsonParser.getValueAsString(null);
    try {
        DateTime dateTime = new DateTime(dateString);
        return dateTime.changeTimeZone(TimeZone.getTimeZone("UTC"), TimeZone.getDefault());
    } catch (RuntimeException runtimeException) {
        runtimeException.printStackTrace();
        return null;
    }
}

@Override
public void serialize(DateTime object, String fieldName, boolean writeFieldNameForObject, JsonGenerator jsonGenerator) throws IOException {
    jsonGenerator.writeStringField(fieldName, object.format("YYYY-MM-DDThh:mm:ss"));
}

}