Nested object mapping

[Максим Касьянов]

Hi,

I have annotation base myBatis configuration.

How i can map nested object with annotaion?

Thank you in advance.

For instance:

class Example{


  public String field1;
  public NestedObject nestedObect;
 
}


class NestedObject{


  public String field2;
 
}

class ExampleMapper{


  @Select("select 'field1' as field1, 'field2' as nestedObjectField")
  Example map();


}

[Guy Rouillier]

Try nestedObject.field2.

--

Guy Rouillier

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[David]

I suppose that in your data model the entities Example and NestedObject have a relation of one to one, the solution that I recommend is:

@Select("select field1 from ExampleEntity")

@Results(id = "selectMap", value = {

@Result(property = "field1", column = "FIELD1", jdbcType = JdbcType.VARCHAR),

        @Result(property = "nestedObject", javaType=NestedObject.class, column = "ID_NESTEDOBJECT", one=@One(select="getNestedObjectById"))

})

Example map();

@Select("select field2 from NestedObjectEntity where ID_NESTEDOBJECT=#{id}")

@Results(id = "nestedObjectMap", value = {

@Result(property = "field2", column = "FIELD2", jdbcType = JdbcType.VARCHAR)

})

NestedObject getNestedObjectById(@Param("id") Long id);