Nullable Integer ignores example value "null" and defaults to 0 #4229
Description
Hi,
I was migrating a Spring-Boot app from SpringFox to SpringDoc and noticed that the example value of the Schema annotation for Integer fields is ignored and defaults to 0.
E.g. defining the following has no effect:
@Schema(nullable = true, example = "null")
private Integer id;
To Reproduce
Steps to reproduce the behaviour:
Spring-Boot 2.7.2 and SpringDoc 1.6.9 are used - and thus Swagger 2.2.0
Checkout https://github.com/dreis2211/swagger-nullable-bug
Run ./gradlew bootRun
Check http://localhost:8080/swagger-ui/index.html#/test-controller/hello
Alternatively, just try this test:
@Test
void schemaExample() {
ResolvedSchema resolvedSchema = ModelConverters.getInstance()
.resolveAsResolvedSchema(new AnnotatedType(TestData.class));
Schema<?> testDataSchema = resolvedSchema.referencedSchemas.get("TestData");
Schema<?> idSchema = testDataSchema.getProperties().get("id");
assertThat(idSchema.getExampleSetFlag()).isTrue();
}
public class TestData {
@io.swagger.v3.oas.annotations.media.Schema(nullable = true, example = "null")
private Integer id;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
}
Expected behaviour
Primitive wrapper types allow null as example value instead of showing 0.
Cheers,
Christoph