将 MyBatis 更新与 foreach 一起使用

Question

我正在为 MyBatis 中的更新语句而苦苦挣扎。我想将多个字符串放在一行中：

UPDATE MY_FILTERS
SET
GROUPS =
  <foreach item="item" collection="selectedGroups" open="" separator="," close="">
    #{item}
  </foreach>,
TEMPLATES = 
  <foreach item="item" collection="selectedTemplates" open="" separator="," close="">
    #{item}
  </foreach>
where ID = #{id}

我尝试了以下替代方案：

open = "'" close = "'"

或

separator = "','"    

但仍然出现这样的异常：

org.springframework.jdbc.BadSqlGrammarException: 
### Error updating database. Cause: java.sql.SQLException: ORA-01747: invalid user.table.column, table.column, or column specification 
### The error may involve my.mybatis.PRPMapper.saveParamsToDB-Inline 
### The error occurred while setting parameters 
### SQL: UPDATE MY_FILTERS SET GROUPS = ? , ? , TEMPLATES = ? , ? where ID = ? 
### Cause: java.sql.SQLException: ORA-01747: invalid user.table.column, table.column, or column specification ; bad SQL grammar []; nested exception is java.sql.SQLException: ORA-01747: invalid user.table.column, table.column, or column specification javax.faces.event.AbortProcessingException: org.springframework.jdbc.BadSqlGrammarException: 

Answer 1

试试

open = "'" close = "'"

和

separator = ","  

和

${item}

有了这些设置，mybatis 不会绑定变量，而是执行字符串替换。请注意，字符串替换容易受到 sql 注入的影响。如果您遇到更多问题，请发布由 mystatis 构建的更新后的 sql 查询