如何在spring-data-mongo中自定义FieldNamingStrategy

Question

在spring-data-mongo中，这个接口的功能还可以扩展吗？

我想要的是在mongodb中保存CamelCaseToUnderline并查询UnderlineToCamelCase。

我看到了部分源代码，它具有最终的FieldNamingStrategy。如果我想对它进行通用化，它必须在实例化之前，怎么做？

public class BasicMongoPersistentProperty extends AnnotationBasedPersistentProperty<MongoPersistentProperty> implements MongoPersistentProperty {
    ....
    private final FieldNamingStrategy fieldNamingStrategy;

    public BasicMongoPersistentProperty(Field field, PropertyDescriptor propertyDescriptor, MongoPersistentEntity<?> owner, SimpleTypeHolder simpleTypeHolder, FieldNamingStrategy fieldNamingStrategy) {

      super(field, propertyDescriptor, owner, simpleTypeHolder);
      this.fieldNamingStrategy = fieldNamingStrategy == null ? PropertyNameFieldNamingStrategy.INSTANCE : fieldNamingStrategy;

      if (isIdProperty() && getFieldName() != ID_FIELD_NAME) {
        LOG.warn("Customizing field name for id property not allowed! Custom name will not be considered!");
      }
    }
   ...
}

Answer 1

嗨，这是从Spring Boot附录中获得的

# MONGODB (MongoProperties)
spring.data.mongodb.field-naming-strategy= # Fully qualified name of the FieldNamingStrategy to use

您可以立即使用以下策略

CamelCaseSplittingFieldNamingStrategy
CamelCaseAbbreviatingFieldNamingStrategy
SnakeCaseFieldNamingStrategy

如果这些都不满足您的需求，请随时扩展它们