Field Mapping

[haorancui94]

I want my userId in code to be user_id field in document.
I was using the field to converting the field with
@Field(name = "user_id")
but it won't work

instead if I use:
@Field(value = "user_id")
it will work

I know in the doc it told us to use @Field("user_id")

But I check the code, might be the code has written in the opposite way that caused this problem?

         /**
	 * The key to be used to store the field inside the document. Alias for {@link #name()}.
	 *
	 * @return an empty {@link String} by default.
	 */
	@AliasFor("name")
	String value() default "";

	/**
	 * The key to be used to store the field inside the document. Alias for {@link #value()}.
	 *
	 * @return an empty {@link String} by default.
	 */
	@AliasFor("value")
	String name() default "";

[mikereiche]

This does look a little weird and behaves a little weird but it's the same as at least one other spring-data implementation.
I'll see if I can make all three forms do the same thing.

[mikereiche]

This change to BasicCouchbasePersistentProperty would change the usage of the Field annotation as desired:

/**
 * Returns the field name of the property.
 * <p/>
 * The field name can be different from the actual property name by using a custom annotation.
 */
String fieldName;
@Override
public String getFieldName() {
	if(fieldName != null ){
		return fieldName;
	}
	Field annotationField = getField().getAnnotation(Field.class);

	if (annotationField != null) {
		if (StringUtils.hasText(annotationField.value())) {
			return fieldName = annotationField.value();
		} else if (StringUtils.hasText(annotationField.name())) {
			return fieldName = annotationField.name();
		}
	}
	JsonProperty annotation = getField().getAnnotation(JsonProperty.class);

	if (annotation != null && StringUtils.hasText(annotation.value())) {
		return fieldName = annotation.value();
	}

	String fName = fieldNamingStrategy.getFieldName(this);

	if (!StringUtils.hasText(fName)) {
		throw new MappingException(String.format("Invalid (null or empty) field name returned for property %s by %s!",
				this, fieldNamingStrategy.getClass()));
	}

	return fieldName = fName;
}