Question

我一直在尝试将弹簧验证器添加到spring-data-rest项目中。

我跟着并设置了＃34;开始使用＆＃34;通过此链接申请：http://spring.io/guides/gs/accessing-data-rest/

...现在我正在尝试通过以下文档添加自定义PeopleValidator： http://docs.spring.io/spring-data/rest/docs/2.1.0.RELEASE/reference/html/validation-chapter.html

我的自定义PeopleValidator看起来像

package hello;

import org.springframework.validation.Errors;
import org.springframework.validation.Validator;

public class PeopleValidator implements Validator {
    @Override
    public boolean supports(Class<?> clazz) {
        return true;
    }

    @Override
    public void validate(Object target, Errors errors) {
        errors.reject("DIE");
    }
}

...我的Application.java类现在看起来像这样

package hello;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;

@Configuration
@EnableJpaRepositories
@Import(RepositoryRestMvcConfiguration.class)
@EnableAutoConfiguration
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Bean
    public PeopleValidator beforeCreatePeopleValidator() {
        return new PeopleValidator();
    }
}

我希望POST到http://localhost:8080/people网址会导致某种错误，因为PeopleValidator拒绝了所有内容。但是，不会抛出任何错误，并且永远不会调用验证程序。

我还尝试过手动设置验证器，如spring-data-rest文档的5.1节所示。

我错过了什么？

Answer 1

所以似乎前/后＆＃34;保存＆＃34;事件仅在PUT和PATCH上触发。在发布时，之前/之后＆＃34;创建＆＃34;事件火灾。

我使用configureValidatingRepositoryEventListener覆盖再次以手动方式尝试了它并且它有效。我不确定我在工作中做的不同于在家工作。我明天要看。

我很乐意听到其他人是否有关于为何无法工作的建议。

对于记录，这是新的Application.java类的样子。

package hello;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.data.rest.core.event.ValidatingRepositoryEventListener;
import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;

@Configuration
@EnableJpaRepositories
@Import(RepositoryRestMvcConfiguration.class)
@EnableAutoConfiguration
public class Application extends RepositoryRestMvcConfiguration {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Override
    protected void configureValidatingRepositoryEventListener(ValidatingRepositoryEventListener validatingListener) {
        validatingListener.addValidator("beforeCreate", new PeopleValidator());
    }
}

Answer 2

看起来该功能目前尚未实现（2.3.0），不幸的是事件名称没有常量，否则下面的解决方案不会那么脆弱。

Configuration使用正确的事件将所有正确命名的Validator bean添加到ValidatingRepositoryEventListener。

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.ListableBeanFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.rest.core.event.ValidatingRepositoryEventListener;
import org.springframework.validation.Validator;

@Configuration
public class ValidatorRegistrar implements InitializingBean {

    private static final List<String> EVENTS;
    static {
        List<String> events = new ArrayList<String>();
        events.add("beforeCreate");
        events.add("afterCreate");
        events.add("beforeSave");
        events.add("afterSave");
        events.add("beforeLinkSave");
        events.add("afterLinkSave");
        events.add("beforeDelete");
        events.add("afterDelete");
        EVENTS = Collections.unmodifiableList(events);
    }

    @Autowired
    ListableBeanFactory beanFactory;

    @Autowired
    ValidatingRepositoryEventListener validatingRepositoryEventListener;

    @Override
    public void afterPropertiesSet() throws Exception {
        Map<String, Validator> validators = beanFactory.getBeansOfType(Validator.class);
        for (Map.Entry<String, Validator> entry : validators.entrySet()) {
            EVENTS.stream().filter(p -> entry.getKey().startsWith(p)).findFirst()
                    .ifPresent(p -> validatingRepositoryEventListener.addValidator(p, entry.getValue()));
        }
    }
}

Answer 3

在黑暗中有点刺伤 - 我没有使用过spring-data-rest。但是，在阅读了您正在关注的教程后，我认为问题是您需要PersonValidator而不是PeopleValidator。相应地重命名一切：

<强> PersonValidator

package hello;

import org.springframework.validation.Errors;
import org.springframework.validation.Validator;

public class PersonValidator implements Validator {
    @Override
    public boolean supports(Class<?> clazz) {
        return true;
    }

    @Override
    public void validate(Object target, Errors errors) {
        errors.reject("DIE");
    }
}

<强>应用

package hello;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;

@Configuration
@EnableJpaRepositories
@Import(RepositoryRestMvcConfiguration.class)
@EnableAutoConfiguration
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Bean
    public PersonValidator beforeCreatePersonValidator() {
        return new PersonValidator();
    }
}

Answer 4

另一种方法是使用此处指定的带注释的处理程序 http://docs.spring.io/spring-data/rest/docs/2.1.0.RELEASE/reference/html/events-chapter.html#d5e443

以下是如何使用带注释的处理程序的示例：

import gr.bytecode.restapp.model.Agent;
import org.springframework.data.rest.core.annotation.HandleBeforeCreate;
import org.springframework.data.rest.core.annotation.HandleBeforeSave;
import org.springframework.data.rest.core.annotation.RepositoryEventHandler;
import org.springframework.stereotype.Component;

@Component
@RepositoryEventHandler(Agent.class)
public class AgentEventHandler {

    public static final String NEW_NAME = "**modified**";

    @HandleBeforeCreate
    public void handleBeforeCreates(Agent agent) {
            agent.setName(NEW_NAME);
    }

    @HandleBeforeSave
    public void handleBeforeSave(Agent agent) {
        agent.setName(NEW_NAME + "..update");
    }
}

示例来自github编辑，以简洁起见。

Spring-Data-Rest验证器

4 个答案: