最近一直都不爽ibtais,用起来一点都不敏捷。今天发现一处非常不灵活的地方。比如一个DO我有两条SQL,其中一条SQL比另外一条SQL多一个last_like_datetime。我想共用一个resultMap居然会报错:
<resultMap id="RM-ALBUM" class="TA-ALBUM"> <result property="id" column="id"/> <result property="gmtCreate" column="create_datetime"/> <result property="lastLikeDatetime" column="last_like_datetime"/> </resultMap>
Caused by: com.ibatis.common.jdbc.exception.NestedSQLException: --- The error occurred in com/duitang/model/mysql/blog/AlbumDO.xml. --- The error occurred while applying a result map. --- Check the AlbumDO.RM-ALBUM. --- Check the result mapping for the 'lastLikeDatetime' property. --- Cause: java.sql.SQLException: Column 'last_like_datetime' not found. at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeQueryWithCallback(MappedStatement.java:201) at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeQueryForObject(MappedStatement.java:120) at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:518) at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:493) at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:106) at org.springframework.orm.ibatis.SqlMapClientTemplate$1.doInSqlMapClient(SqlMapClientTemplate.java:270) at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:200) ... 32 more Caused by: java.sql.SQLException: Column 'last_like_datetime' not found. at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919) at com.mysql.jdbc.ResultSetImpl.findColumn(ResultSetImpl.java:1166) at com.mysql.jdbc.ResultSetImpl.getTimestamp(ResultSetImpl.java:6229) at org.apache.commons.dbcp.DelegatingResultSet.getTimestamp(DelegatingResultSet.java:300) at org.apache.commons.dbcp.DelegatingResultSet.getTimestamp(DelegatingResultSet.java:300) at com.ibatis.sqlmap.engine.type.DateTypeHandler.getResult(DateTypeHandler.java:38) at com.ibatis.sqlmap.engine.mapping.result.ResultMap.getPrimitiveResultMappingValue(ResultMap.java:619) at com.ibatis.sqlmap.engine.mapping.result.ResultMap.getResults(ResultMap.java:345) at com.ibatis.sqlmap.engine.execution.SqlExecutor.handleResults(SqlExecutor.java:384) at com.ibatis.sqlmap.engine.execution.SqlExecutor.handleMultipleResults(SqlExecutor.java:300) at com.ibatis.sqlmap.engine.execution.SqlExecutor.executeQuery(SqlExecutor.java:189) at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.sqlExecuteQuery(MappedStatement.java:221) at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeQueryWithCallback(MappedStatement.java:189) ... 38 more
原来这SB只要发现resultMap有定义字段就会直接调用rs.getResult('column_name')。