在 spring-boot-starter-data-solr 中启用 schemaCreationSupport

问题描述

我使用 spring-boot-starter-data-solr 并希望利用 Spring Data Solr 的 schmea cration 支持，如 文档:

I use spring-boot-starter-data-solr and would like to make use of the schmea cration support of Spring Data Solr, as stated in the documentation:

每当应用程序上下文刷新时，自动模式填充将检查您的域类型，并根据属性配置将新字段填充到您的索引中.这需要 solr 以 Schemaless 模式运行.

但是，我无法做到这一点.据我所知，Spring Boot starter 没有启用 @EnableSolrRepositories 注释上的 schemaCreationSupport 标志.所以我尝试的是以下内容:

However, I am not able to achieve this. As far as I can see, the Spring Boot starter does not enable the schemaCreationSupport flag on the @EnableSolrRepositories annotation. So what I tried is the following:

@SpringBootApplication
@EnableSolrRepositories(schemaCreationSupport = true)
public class MyApplication {
  @Bean
  public SolrOperations solrTemplate(SolrClient solr) {
    return new SolrTemplate(solr);
  }
}

但是在 Wireshark 中，当通过存储库保存新实体时，我看不到任何对 Solr Schema API 的调用.

But looking in Wireshark I cannot see any calls to the Solr Schema API when saving new entities through the repository.

这是为了工作，还是我错过了什么?我使用的是 Solr 6.2.0 和 Spring Boot 1.4.1.

Is this intended to work, or what am I missing? I am using Solr 6.2.0 with Spring Boot 1.4.1.

推荐答案

我遇到了同样的问题.经过一些调试，我找到了根本没有发生架构创建(或更新)的根本原因:

I've run into the same problem. After some debugging, I've found the root cause why the schema creation (or update) is not happening at all:

通过使用 @EnableSolrRepositories 注释，Spring 扩展会将工厂 bean 添加到创建存储库中使用的 SolrTemplate 的上下文中.此模板初始化一个 SolrPersistentEntitySchemaCreator，它应该进行创建/更新.

By using the @EnableSolrRepositories annotation, an Spring extension will add a factory-bean to the context that creates the SolrTemplate that is used in the repositories. This template initialises a SolrPersistentEntitySchemaCreator, which should do the creation/update.

public void afterPropertiesSet() {

  if (this.mappingContext == null) {
    this.mappingContext = new SimpleSolrMappingContext(
      new SolrPersistentEntitySchemaCreator(this.solrClientFactory)
       .enable(this.schemaCreationFeatures));
  }

  // ...
}

问题是标志schemaCreationFeatures(启用创建者)是在工厂调用afterPropertiesSet()之后设置的，所以这是不可能的让创作者完成它的工作.

Problem is that the flag schemaCreationFeatures (which enables the creator) is set after the factory calls the afterPropertiesSet(), so it's impossible for the creator to do it's work.

我将在 spring-data-solr 问题跟踪器中创建一个问题.现在看不到任何解决方法，其他要么使用自定义的分支/构建 spring-data 或扩展一堆 spring-class 并尝试通过使用之前设置标志(但对此表示怀疑).

I'll create an issue in the spring-data-solr issue tracker. Don't see any workaround right now, other either having a custom fork/build of spring-data or extend a bunch of spring-classes and trying to get the flag set before by using (but doubt of this can be done).

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