spring - 请使用 'MongoMappingContext#setAutoIndexCreation(boolean)' 或覆盖 'MongoConfigurationSupport#autoIndexCreation()' 明确
问题描述
我浏览了https://docs.spring.io/spring-data/mongodb/docs/2.2.0.RC1/reference/html/#mapping-usage和网络上的其他资源,但解决方案对我不起作用.
我正在使用Spring Boot 2.2.2.RELEASE
和Spring Data Mongo
。在此示例中,在模型/Pojo 字段级别我们正在使用
@Indexed(name = AppConstants.FIRSTNAME_INDEX, direction = IndexDirection.ASCENDING)
private String firstName;
错误:
Please use 'MongoMappingContext#setAutoIndexCreation(boolean)' or override 'MongoConfigurationSupport#autoIndexCreation()' to be explicit.
However, we recommend setting up indices manually in an application ready block. You may use index derivation there as well.
> -----------------------------------------------------------------------------------------
> @EventListener(ApplicationReadyEvent.class)
> public void initIndicesAfterStartup() {
>
> IndexOperations indexOps = mongoTemplate.indexOps(DomainType.class);
>
> IndexResolver resolver = new MongoPersistentEntityIndexResolver(mongoMappingContext);
> resolver.resolveIndexFor(DomainType.class).forEach(indexOps::ensureIndex);
> }
> -----------------------------------------------------------------------------------------
正如日志中所建议的,我实现了,但我没有看到方法 setAutoIndexCreation。
public class MongoConfig extends AbstractMongoClientConfiguration {
@Override
public MongoClient mongoClient() {
// TODO Auto-generated method stub
return null;
}
@Override
protected String getDatabaseName() {
// TODO Auto-generated method stub
return null;
}
}
解决方案
在 application.properties 文件中禁用自动索引创建
spring.data.mongodb.auto-index-creation=false
或 application.yml 文件
spring:
data:
mongodb:
auto-index-creation: false
使用 @Configuration 注解创建 MongoConfiguration 类
注入这个依赖
private final MongoTemplate mongoTemplate;
private final MongoConverter mongoConverter;
并添加此方法
@EventListener(ApplicationReadyEvent.class)
public void initIndicesAfterStartup() {
log.info("Mongo InitIndicesAfterStartup init");
var init = System.currentTimeMillis();
var mappingContext = this.mongoConverter.getMappingContext();
if (mappingContext instanceof MongoMappingContext) {
MongoMappingContext mongoMappingContext = (MongoMappingContext) mappingContext;
for (BasicMongoPersistentEntity<?> persistentEntity : mongoMappingContext.getPersistentEntities()) {
var clazz = persistentEntity.getType();
if (clazz.isAnnotationPresent(Document.class)) {
var resolver = new MongoPersistentEntityIndexResolver(mongoMappingContext);
var indexOps = mongoTemplate.indexOps(clazz);
resolver.resolveIndexFor(clazz).forEach(indexOps::ensureIndex);
}
}
}
log.info("Mongo InitIndicesAfterStartup take: {}", (System.currentTimeMillis() - init));
}
请记住 var 仅适用于 java 11+
最后一个类,使用 Lombok
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.context.event.EventListener;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.convert.MongoConverter;
import org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexResolver;
import org.springframework.data.mongodb.core.mapping.BasicMongoPersistentEntity;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
@Slf4j
@RequiredArgsConstructor
@Configuration
public class MongoConfiguration {
private final MongoTemplate mongoTemplate;
private final MongoConverter mongoConverter;
@EventListener(ApplicationReadyEvent.class)
public void initIndicesAfterStartup() {
log.info("Mongo InitIndicesAfterStartup init");
var init = System.currentTimeMillis();
var mappingContext = this.mongoConverter.getMappingContext();
if (mappingContext instanceof MongoMappingContext) {
MongoMappingContext mongoMappingContext = (MongoMappingContext) mappingContext;
for (BasicMongoPersistentEntity<?> persistentEntity : mongoMappingContext.getPersistentEntities()) {
var clazz = persistentEntity.getType();
if (clazz.isAnnotationPresent(Document.class)) {
var resolver = new MongoPersistentEntityIndexResolver(mongoMappingContext);
var indexOps = mongoTemplate.indexOps(clazz);
resolver.resolveIndexFor(clazz).forEach(indexOps::ensureIndex);
}
}
}
log.info("Mongo InitIndicesAfterStartup take: {}", (System.currentTimeMillis() - init));
}
}
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