准备: Spring Boot + Web + Jpa 代码: 类:AccountRepository @Query(value = "select new com.sino.report.entity.Test(a.id,a.userName) from Account a LEFT Join Hospital h on a.id = h.id") List<Test> findTest2(); 运行项目直接出错 Path expected for join! 参考了它才
Jpa自定义查询报错 问题背景 今天遇到一个奇怪的报错"Failed to convert from type [java.lang.Object[]] to type",这个报错,百度上也是很少的,恰恰是这样的问题,引起我了解决的欲望.先看看报错: org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.Object[]] to type [o
spring boot项目中 使用spring data jpa 启动报错: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dealerTransferServiceImpl': Unsatisfied dependency expressed through field 'dealerTransferDao'; nested exception i
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of org.springframework.data.domain.Page: abstract types either need to be mapped to concrete types, have custom deserializer, or contain additional type inform
[peter@minion ~]$ docker swarm join --token SWMTKN-1-3mj5po3c7o04le7quhkdhz6pm9b8ziv3qe0u7hx0hrgxsnaram-0p1f40vtehanu6ugw8ug2wasy 10.0.0.10:2377 Error response from daemon: error while validating Root CA Certificate: x509: certificate has expired or
The specified LINQ expression contains references to queries that are associated with different cont. 解决方法: 查询源的最后添加.ToList(); 一定是哪里转换成了IEnumerable或其他东东了ToList 就好了!
查询语句: select 分数 from cfull join don c.姓名=d.姓名 报错: [Err] 1054 - Unknown column 'c.姓名' in 'on clause' 经测试: full join 报错, join,没问题, left join 没问题, right join 没问题
使用场景:在spring data jpa下使用@Query("hql语句") 然后在项目启动的时候报错 hql语句报错:antlr.NoViableAltException: unexpected token: roleName 仔细查看了一下代码: @Query(value = "from Role as r left join r.department as d left join d.company as c where" + " (:depart
spring jpa 实体互相引用返回restful数据循环引用报错的问题 Java实体里两个对象有关联关系,互相引用,比如,在一对多的关联关系里 Problem对象,引用了标签列表ProblemLabel ProblemLabel对象,引用了所属Problem 这样构成了互相引用,导致递归循环内存溢出异常: org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: I
项目中在使用线程跑定时任务时,遇到报错,"Could not open JPA EntityManager for transaction Caused by: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection",报错信息看是数据库连接无法获取问题,但是在开发调试的过程中,并没有这个错误,只有在部署到机器,运行定时任务时,会抛出这样的异常: 自己定位无果后,求助于同组大哥,大哥
报错: org.springframework.expression.spel.SpelEvaluationException: EL1007E: Property or field 'status' cannot be found on null 如果检查 自己写的SQL语句完全没有问题的情况下,并且已经使用了@Param(value ="") 那么你需要注意,@Param()这个注解引入的jar包是jpa的jar包还是ibatis的jar包. 注意@Param()引用的jar包是否
使用spring data jpa 的删除操作,需要加注解@Modifying @Transactional 否则报错如下: No EntityManager with actual transaction available for current thread - cannot reliably process 'remove' call 场景如下: 在service中,先执行 delete 操作,再执行 save操作 报错如下: No EntityManager with actu
在spring boot中, repository中使用@Query注解使用hql查询,使用@Param引用参数 如题报错: For queries with named parameters you need to use provide names for method parameters. Use @Param for query method parameters, or when on Java 8+ use the javac flag -parameters. org.sprin