Mybatis nested collection doesn't work correctly with column prefix
- by Shikarn-O
I need to set collection for object in another collection using mybatis mappings.
It works for me w/o using columnPrefix, but I need it since there are a lot of repeteable columns.
<collection property="childs"
javaType="ArrayList" ofType="org.example.mybatis.Child"
resultMap="ChildMap" columnPrefix="c_"/>
</resultMap>
<resultMap id="ChildMap" type="org.example.mybatis.Parent">
<id column="Id" jdbcType="VARCHAR" property="id" />
<id column="ParentId" jdbcType="VARCHAR" property="parentId" />
<id column="Name" jdbcType="VARCHAR" property="name" />
<id column="SurName" jdbcType="VARCHAR" property="surName" />
<id column="Age" jdbcType="INTEGER" property="age" />
<collection property="toys"
javaType="ArrayList" ofType="org.example.mybatis.Toy"
resultMap="ToyMap" columnPrefix="t_"/>
</resultMap>
<resultMap id="ToyMap" type="org.example.mybatis.Toy">
<id column="Id" jdbcType="VARCHAR" property="id" />
<id column="ChildId" jdbcType="VARCHAR" property="childId" />
<id column="Name" jdbcType="VARCHAR" property="name" />
<id column="Color" jdbcType="VARCHAR" property="color" />
</resultMap>
<sql id="Parent_Column_List">
p.Id, p.Name, p.SurName,
</sql>
<sql id="Child_Column_List">
c.Id as c_Id, c.ParentId as c_ParentId, c.Name as c_Name, c.SurName as c_Surname, c.Age as c_Age,
</sql>
<sql id="Toy_Column_List">
t.Id as t_Id, t.Name as t_Name, t.Color as t_Color
</sql>
<select id="getParent" parameterType="java.lang.String" resultMap="ParentMap" >
select
<include refid="Parent_Column_List"/>
<include refid="Child_Column_List" />
<include refid="Toy_Column_List" />
from Parent p
left outer join Child c on p.Id = c.ParentId
left outer join Toy t on c.Id = t.ChildId
where p.id = #{id,jdbcType=VARCHAR}
With columnPrefix all works fine, but nested toys collection is empty.
Sql query on database works correctly and all toys are joined.
May be i missed something or this is bug with mybatis?
