mybatis parent nested query value transfer / column plurality of parameter values passed

mybatis collection in the column pass plurality of parameter values ​​(using the parent query map value)

 

property	description
column	Database column names or column label alias. Passed to the same resultSet.getString (columnName) parameter name. Note: when dealing with key combinations, you can use column = "{prop1 = col1, prop2 = col2}" the syntax, a plurality of column names passed to the nested query. This will prop1 and prop2 target nested select statement to set the parameters of the object.

<-! 2. -> 
<The resultMap type = "com.Pojo" ID = "tree_map"> 
    <column ID = "ID" = Property "ID"> </ ID> 
　　<-! Result field is a database ( may be as a field) which must be present and pojo -> 
    <Result column = "database field" property = "entity class field" javaType = "type"> </ Result> 
    <= Collection Property "field pojo" ofType = "com.ChildrenPojo (pojo entity class)" 
                column = "{ID = ID, param = the params }" 
                the javaType = "java.util.List" SELECT = "selectMenuChildren"> </ Collection> 
</ The resultMap> 

<! - 1. The inlet query tree -> 
<SELECT ID = "selTree" The resultMap = "tree_map">
    select *, IFNULL(#{forbidden},'') as params from table_name where 1=1
    order by rank
</select>

<!-- 3.查询子 -->
<the SELECT the above mentioned id = "selChildren" resultMap = "tree_map"> 
<-! Note that the params field is required, otherwise it will not find the params -> 
    the SELECT *, IFNULL (# {} Forbidden, '') AS params WHERE pId = # ds_system_menu from {ID} 
    <= IF Test 'param! = null and param! = ""'> 
        and # param = {} param 
    </ IF> 
    Order by Rank 
</ SELECT>

　　The above description