发布带有列表的 JSON

【问题标题】：Posting a JSON with a list发布带有列表的 JSON
【发布时间】：2021-07-07 00:24:36
【问题描述】：

我正在学习 Spring Boot，并尝试编写一个简单的应用程序来存储食谱。代码如下：

@AllArgsConstructor
@Data
@Entity
@NoArgsConstructor
public class Recipe {

    @Id
    @SequenceGenerator(name = "id", allocationSize = 1)
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "id")
    private Long id;

    private String name;

    private String description;

    @ElementCollection
    private List<String> ingredients;

    @ElementCollection
    private List<String> directions;
}


@RestController
public class RecipeController {

    private final RecipeService recipeService;

    @Autowired
    public RecipeController(RecipeService recipeService) {
        this.recipeService = recipeService;
    }

    @PostMapping("/api/recipe/new")
    public Recipe createRecipe(@RequestBody Recipe recipe) {
        return recipeService.createRecipe(recipe);
    }

    @GetMapping("/api/recipe/new")
    public List<Recipe> getAllRecipes() {
        return recipeService.getAllRecipes();
    }

    @GetMapping("/api/recipe/new/{id}")
    public ResponseEntity<Recipe> getRecipeById(@PathVariable Long id) {
        return recipeService.getRecipeById(id);
    }

    @DeleteMapping("/api/recipe/{id}")
    @ResponseStatus(HttpStatus.NO_CONTENT)
    public void deleteRecipe(@PathVariable Long id) {
        recipeService.deleteRecipe(id);
    }

}


@Service
public class RecipeService {

    private final RecipeRepository recipeRepository;

    @Autowired
    public RecipeService(RecipeRepository recipeRepository) {
        this.recipeRepository = recipeRepository;
    }

    public Recipe createRecipe(Recipe recipe) {
        return recipeRepository.save(recipe);
    }

    public List<Recipe> getAllRecipes() {
        return recipeRepository.findAll();
    }

    public ResponseEntity<Recipe> getRecipeById(Long id) {
        Recipe recipe = recipeRepository.findById(id)
                .orElseThrow(() -> new ResponseStatusException(HttpStatus.BAD_REQUEST,
                        "Recipe with the given id does not exist."));

        return ResponseEntity.ok().body(recipe);
    }

    public void deleteRecipe(Long id) {
        Recipe recipe = recipeRepository.findById(id)
                .orElseThrow(() -> new ResponseStatusException(HttpStatus.BAD_REQUEST,
                        "Recipe with the given id does not exist."));

        recipeRepository.delete(recipe);
    }
    
}


@Repository
public interface RecipeRepository extends JpaRepository<Recipe, Long> {

}

我正在尝试发送的邮递员请求：

{
   "name": "Warming Ginger Tea",
   "description": "Ginger tea is a warming drink for cool weather, ...",
   "ingredients": ["1 inch ginger root, minced", "1/2 lemon, juiced", "1/2 teaspoon manuka honey"],
   "directions": ["Place all ingredients in a mug and fill with warm water (not too hot so you keep the beneficial honey compounds in tact)", "Steep for 5-10 minutes", "Drink and enjoy"]
}

邮递员回复：

{
    "timestamp": "2021-07-07T00:18:07.167+00:00",
    "status": 500,
    "error": "Internal Server Error",
    "message": "could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement",
    "path": "/api/recipe/new"
}

IntelliJ 响应：

org.h2.jdbc.JdbcSQLIntegrityConstraintViolationException:
NULL not allowed for column "RECIPES_ID"; SQL statement:
insert into recipe_ingredients (recipe_id, ingredients) values (?, ?) [23502-200]
    at org.h2.message.DbException.getJdbcSQLException(DbException.java:459) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.message.DbException.get(DbException.java:205) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.message.DbException.get(DbException.java:181) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.table.Column.validateConvertUpdateSequence(Column.java:374) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.table.Table.validateConvertUpdateSequence(Table.java:845) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.command.dml.Insert.insertRows(Insert.java:187) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.command.dml.Insert.update(Insert.java:151) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.command.CommandContainer.update(CommandContainer.java:198) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.command.Command.executeUpdate(Command.java:251) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.jdbc.JdbcPreparedStatement.executeUpdateInternal(JdbcPreparedStatement.java:191) ~[h2-1.4.200.jar:1.4.200]
    at org.h2.jdbc.JdbcPreparedStatement.executeUpdate(JdbcPreparedStatement.java:152) ~[h2-1.4.200.jar:1.4.200]
    at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeUpdate(ProxyPreparedStatement.java:61) ~[HikariCP-4.0.3.jar:na]
    at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeUpdate(HikariProxyPreparedStatement.java) ~[HikariCP-4.0.3.jar:na]
    at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:197) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:46) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.persister.collection.AbstractCollectionPersister.recreate(AbstractCollectionPersister.java:1357) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.action.internal.CollectionRecreateAction.execute(CollectionRecreateAction.java:50) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.engine.spi.ActionQueue.lambda$executeActions$1(ActionQueue.java:478) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:684) ~[na:na]
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:475) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:344) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:40) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:99) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1362) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:453) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3212) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2380) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:448) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:183) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:40) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:281) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
    at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:562) ~[spring-orm-5.3.8.jar:5.3.8]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743) ~[spring-tx-5.3.8.jar:5.3.8]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711) ~[spring-tx-5.3.8.jar:5.3.8]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:654) ~[spring-tx-5.3.8.jar:5.3.8]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:407) ~[spring-tx-5.3.8.jar:5.3.8]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-5.3.8.jar:5.3.8]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.8.jar:5.3.8]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137) ~[spring-tx-5.3.8.jar:5.3.8]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.8.jar:5.3.8]
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:174) ~[spring-data-jpa-2.5.2.jar:2.5.2]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.8.jar:5.3.8]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.8.jar:5.3.8]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.8.jar:5.3.8]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.8.jar:5.3.8]
    at com.sun.proxy.$Proxy84.save(Unknown Source) ~[na:na]
    at com.example.recipes.recipe.RecipeService.createRecipe(RecipeService.java:24) ~[classes/:na]
    at com.example.recipes.recipe.RecipeController.createRecipe(RecipeController.java:22) ~[classes/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.8.jar:5.3.8]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.8.jar:5.3.8]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.8.jar:5.3.8]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.8.jar:5.3.8]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[tomcat-embed-core-9.0.48.jar:4.0.FR]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.8.jar:5.3.8]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.48.jar:4.0.FR]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.8.jar:5.3.8]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.8.jar:5.3.8]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.8.jar:5.3.8]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.8.jar:5.3.8]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.48.jar:9.0.48]
    at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

我已经尝试解决它好几个小时了。我真的不知道为什么该列显示为空。如果成分和说明是普通字符串，则该请求可以正常工作。

【问题讨论】：

  • 如果'成分和方向是普通字符串'，你能粘贴工作邮递员的请求内容吗？
  • @LeiYang 如果我不够清楚，我很抱歉。我的意思是，如果我将“成分”和“方向”字段更改为字符串，那么代码可以在适当的邮递员请求下工作。我并不是说如果我将请求更改为包含字符串而不是集合，上述代码就可以工作。至于它的样子，嗯，“成分”和“方向”的值是字符串，就像在“名称”和“描述”中一样。

标签： java json spring-boot


【解决方案1】：

写入连接表“recipe_ingredients”时似乎失败了。使用@ElementCollection 将@CollectionTable 添加到连接列

@CollectionTable(name = "recipe_ingredients", joinColumns = @JoinColumn(name = "recipe_id"))

编辑：

【讨论】：

  • 不幸的是，这没有帮助。出现同样的错误。
  • 我仍然认为这与表的复数命名有关-您的类是“Recipe”，并且在连接表中它正在寻找“recipes_id”。您可以为您的课程明确使用@Table 注释并检查是否有更改。使用@Table(name="Recipe")
  • 我刚刚使用您的代码创建了一个项目，没有任何更改 - 甚至没有我建议的 @Table 注释，并且您使用的发布请求没有任何问题。请参阅我的答案中的屏幕截图更新。
  • 感谢您的帮助。我检查了我的数据库，有一个名为“成分”的表。我不知道它为什么在那里，但是当我删除所有表并重新开始时，请求通过了。
猜你喜欢
  • 1970-01-01
  • 2022-11-12
  • 2015-10-08
  • 2017-08-14
  • 2023-03-08
  • 2021-10-31
  • 1970-01-01
  • 1970-01-01
  • 2015-06-06
相关资源
最近更新 更多
热门标签
Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode