用mybaits 写一个关联查询 查询商品表关联商品规格表,并查询规格表中的数量.价格等,为了sql重用性,利用 association 节点 查询 结果并赋值报错 商品表的mapper文件为GooodsMapper.xml 规格表的mapper 文件为GoodsSpecificationsMapper.xml java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for m
如题,关联外键的时候,报错类型匹配.但是两个 类型都是int sql 如下: CREATE TABLE IF NOT EXISTS `alert_receiver_map` ( `id` INT UNSIGNED AUTO_INCREMENT, `alert_id` INT NOT NULL, `receiver_id` INT NOT NULL, PRIMARY KEY ( `id` ), FOREIGN KEY (`alert_id`) REFERENCES alert_conditions
1. 使用nvm安装node之后,直接运行node命令会报错 node: command not found 需要使用nvm ls 查询一下当前使用的安装的node版本,然后使用node use 版本号 ,在运行node -v 就可以了 2. 但是当重新连接服务器后,运行node又会报错 node: command not found 这时候我们需要手动配置一下 查询node路径:whereis node(先nvm use 一下,不然会查不到路径) ln -s node路径 /usr/loca
报错内容:sql 1093 - You can't specify target table 'u' for update in FROM clause 错误原因: if you're doing an UPDATE/INSERT/DELETE on a table, you can't reference that table in an inner query 解决方法: (you can however reference a field from that outer table...
特征1: hbase.client.RetriesExhaustedException: Can't get the locations 特征2: hbase日志报错如下:org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/hbaseid 特征3: unexpected error, closing socket connection a
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
非常诡异的报错,信息如下:org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped [select count(*) from User u where u.userName=? and u.userPassword=? ]Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped类似的报错信息的解决方法,
