third_codes/mybatis-plus-join
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admin 2021-01-29 17:29:54 +08:00
parent 50d1c119f9
commit c6bc2791c9
1 changed files with 6 additions and 6 deletions
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@ -61,10 +61,10 @@ class test {
void testJoin() { void testJoin() {
List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>() List<UserDTO> list = userMapper.selectJoinList(new MyLambdaQueryWrapper<UserEntity>()
.selectAll(UserEntity.class) .selectAll(UserEntity.class)
.leftJoin(UserEntity::getId, UserAddressEntity::getUserId, r1 -> r1 .leftJoin(UserEntity::getId, UserAddressEntity::getUserId,
.select(UserAddressEntity::getAddress) r1 -> r1.select(UserAddressEntity::getAddress)
.leftJoin(UserAddressEntity::getAreaId, AreaEntity::getId, .leftJoin(UserAddressEntity::getAreaId, AreaEntity::getId,
r2 -> r2.select(AreaEntity::getProvince))) r2 -> r2.select(AreaEntity::getProvince)))
, UserDTO.class); , UserDTO.class);
} }
} }
@ -93,8 +93,8 @@ class test {
.selectAll(主表实体类.class) .selectAll(主表实体类.class)
.leftJoin(主表实体类on属性, 子表实体类on属性, 子表对象 -> 子表对象 .leftJoin(主表实体类on属性, 子表实体类on属性, 子表对象 -> 子表对象
.select(子表查询字段) .select(子表查询字段)
.leftJoin(UserAddressEntity::getAreaId, AreaEntity::getId, .leftJoin(第二个表的on属性, 第三个表的on属性,
r2 -> r2.select(AreaEntity::getProvince))) r2 -> r2.select(第三个表的查询字段)))
, UserDTO.class);//返回对象class , UserDTO.class);//返回对象class
} }
} }