one to many relation using mybatis or ibatis

Question

I have database which has two tables

  post: 
    id
    post_name
    post_desc        

  files:
    file_id
    file_name

  post_attachments
    post_id         


        

Answer 1

As shown in the manual, you have to write a more complex query and change the mapper.

The request will be something like that :

<select id="selectPosts" resultType="com.mycom.myproject.bean.postBean">  
    select id, post_name, file_id, file_name as postName from post left outer join files
</select>

And your result map :

<resultMap id="detailedPostResultMap" type="Blog">
  <result property="id" column="id"/>
  <result property="name" column="post_name"/>
  <collection property=filesAttachment" ofType="FileAttachment">
     <id property="fileId" column="file_id"/>
     <result property="fileName" column="file_name"/>
  </collection>
</resultMap>