mirror of
https://gitee.com/mybatis-flex/mybatis-flex.git
synced 2025-12-07 00:58:24 +08:00
optimize：Relation注解属性targetFieldBind注释
add： 1：Relation注解属性targetFieldBind使用文档 2：targetFieldBind测试Model的toString方法
This commit is contained in:
Ice
parent
39d8375e44
commit
922e449f5b
@ -352,6 +352,111 @@ public class Account implements Serializable {
|
||||
}
|
||||
```
|
||||
|
||||
Relation结果集只使用某个字段值-`since v1.6.6`
|
||||
|
||||
`RelationOneToOne`、`RelationOneToMany`、`RelationManyToOne`、`RelationManyToMany`新增属性`targetFieldBind`
|
||||
```java {7-11}
|
||||
/**
|
||||
* 目标对象的关系实体类的属性绑定
|
||||
* <p>
|
||||
* 当字段不为空串时,只进行某个字段赋值(使用对应字段类型接收)
|
||||
* @return 属性名称
|
||||
*/
|
||||
String targetFieldBind() default "";
|
||||
```
|
||||
> 注解其他属性配置使用不变，当配置了`targetFieldBind`值时，只提取目标对象关系实体类的该属性
|
||||
>
|
||||
> 注意：因为不是对象接收，所以该配置需要强制配置注解`targetTable`属性(因为是某个字段接收，并不是某个实体对应的表，所以需要增加`targetTable`获取目标表信息
|
||||
>
|
||||
> 示例场景：有个业务有个操作日志，操作日志中有个createBy(操作人字段)，此时在日志详情或者说日志列表中需要显示操作人名称，且只需要这一个字段，此时使用实体接收会导致不必要的字段出现，接口文档也会变得混乱。该场景也可以使用`Field Query`和`Join Query`实现
|
||||
>
|
||||
假设一个账户
|
||||
- 每个账户有一个唯一对应的`id_number`列在表`tb_id_card`中
|
||||
- 每个账户拥有多个订单`tb_user_order`
|
||||
- 一个账户可以有多个角色，一个角色也可以分配给多个账户，他们通过中间表`tb_user_role`进行关系映射
|
||||
|
||||
```java {7-11}
|
||||
@Table("tb_user")
|
||||
public class UserVO5 implements Serializable {
|
||||
private static final long serialVersionUID = 474700189859144273L;
|
||||
|
||||
@Id
|
||||
private Integer userId;
|
||||
private String userName;
|
||||
private String password;
|
||||
|
||||
@RelationOneToOne(
|
||||
selfField = "userId",
|
||||
targetTable = "tb_id_card",
|
||||
targetField = "id",
|
||||
targetFieldBind = "idNumber"
|
||||
)
|
||||
//该处可以定义其他属性名，不一定要是目标对象的字段名
|
||||
private String idNumberCustomFieldName;
|
||||
|
||||
@RelationOneToMany(
|
||||
selfField = "userId",
|
||||
targetTable = "tb_user_order",
|
||||
targetField = "userId",
|
||||
targetFieldBind = "orderId"
|
||||
)
|
||||
private List<Integer> orderIdList;
|
||||
|
||||
@RelationManyToMany(
|
||||
selfField = "userId",
|
||||
targetTable = "tb_role",
|
||||
targetField = "roleId",
|
||||
targetFieldBind = "roleName",
|
||||
joinTable = "tb_user_role",
|
||||
joinSelfColumn = "user_id",
|
||||
joinTargetColumn = "role_id"
|
||||
)
|
||||
private List<String> roleNameList;
|
||||
|
||||
//getter setter toString
|
||||
}
|
||||
```
|
||||
进行查询
|
||||
```java
|
||||
List<UserVO5> userVO5List = userMapper.selectListWithRelationsByQueryAs(QueryWrapper.create(), UserVO5.class);
|
||||
System.out.println(userVO5List);
|
||||
```
|
||||
输出结果
|
||||
```json
|
||||
[{
|
||||
userId = 1,
|
||||
userName = '张三',
|
||||
password = '12345678',
|
||||
idNumberCustomFieldName = 'F281C807-C40B-472D-82F5-6130199C6328',
|
||||
orderIdList = [1],
|
||||
roleNameList = [普通用户]
|
||||
},
|
||||
{
|
||||
userId = 2,
|
||||
userName = '李四',
|
||||
password = '87654321',
|
||||
idNumberCustomFieldName = '6176E9AD-36EF-4201-A5F7-CCE89B254952',
|
||||
orderIdList = [3, 2],
|
||||
roleNameList = [普通用户, 贵族用户]
|
||||
},
|
||||
{
|
||||
userId = 3,
|
||||
userName = '王五',
|
||||
password = '09897654',
|
||||
idNumberCustomFieldName = 'A038E6EA-1FDE-4191-AA41-06F78E91F6C2',
|
||||
orderIdList = [6, 5, 4],
|
||||
roleNameList = [普通用户, 贵族用户, 超级贵族用户]
|
||||
},
|
||||
{
|
||||
userId = 4,
|
||||
userName = '苏六',
|
||||
password = '45678345',
|
||||
idNumberCustomFieldName = 'A33E8BAA-93F2-4E28-A161-15CF7D0AE6D0',
|
||||
orderIdList = [],
|
||||
roleNameList = [普通用户, 贵族用户, 超级贵族用户, 管理员用户]
|
||||
}]
|
||||
```
|
||||
|
||||
## 父子关系查询
|
||||
|
||||
比如在一些系统中，比如菜单会有一些父子关系，例如菜单表如下：
|
||||
|
||||
@ -68,7 +68,7 @@ public @interface RelationManyToMany {
|
||||
String targetField() default "";
|
||||
|
||||
/**
|
||||
* 目标实体类的字段绑定
|
||||
* 目标对象的关系实体类的属性绑定
|
||||
* <p>
|
||||
* 当字段不为空串时,只进行某个字段赋值(使用对应字段类型接收)
|
||||
* @return 属性名称
|
||||
|
||||
@ -68,7 +68,7 @@ public @interface RelationManyToOne {
|
||||
String targetField() default "";
|
||||
|
||||
/**
|
||||
* 目标实体类的字段绑定
|
||||
* 目标对象的关系实体类的属性绑定
|
||||
* <p>
|
||||
* 当字段不为空串时,只进行某个字段赋值(使用对应字段类型接收)
|
||||
* @return 属性名称
|
||||
|
||||
@ -68,7 +68,7 @@ public @interface RelationOneToMany {
|
||||
String targetField();
|
||||
|
||||
/**
|
||||
* 目标实体类的字段绑定
|
||||
* 目标对象的关系实体类的属性绑定
|
||||
* <p>
|
||||
* 当字段不为空串时,只进行某个字段赋值(使用对应字段类型接收)
|
||||
* @return 属性名称
|
||||
|
||||
@ -68,7 +68,7 @@ public @interface RelationOneToOne {
|
||||
String targetField();
|
||||
|
||||
/**
|
||||
* 目标实体类的字段绑定
|
||||
* 目标对象的关系实体类的属性绑定
|
||||
* <p>
|
||||
* 当字段不为空串时,只进行某个字段赋值(使用对应字段类型接收)
|
||||
* @return 属性名称
|
||||
|
||||
@ -93,4 +93,16 @@ public class UserVO5 implements Serializable {
|
||||
public void setRoleNameList(List<String> roleNameList) {
|
||||
this.roleNameList = roleNameList;
|
||||
}
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
return "UserVO5{" +
|
||||
"userId=" + userId +
|
||||
", userName='" + userName + '\'' +
|
||||
", password='" + password + '\'' +
|
||||
", idNumberCustomFieldName='" + idNumberCustomFieldName + '\'' +
|
||||
", orderIdList=" + orderIdList +
|
||||
", roleNameList=" + roleNameList +
|
||||
'}';
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user