@ApiModelProperty(value = , name = , position = 3)
时间: 2024-04-25 22:22:51 浏览: 83
这是一个使用 @ApiModelProperty 注解的代码片段,该注解用于为 API 文档生成工具提供额外的信息。在这个例子中,该注解被用于为一个属性添加详细说明。具体来说,通过设置 value 属性,可以提供属性的描述信息;通过设置 name 属性,可以指定属性的名称;通过设置 position 属性,可以指定属性的位置。请注意,代码中的注解参数是空的,你可能需要补充这些参数来提供具体的值。
相关问题
@Data @AllArgsConstructor @NoArgsConstructor @Builder @Table(name = "advert") public class Advert { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @ApiModelProperty(value = "广告唯一id") private Integer id; @ApiModelProperty(value = "广告名称") @NotBlank(message = "广告名称不可为空", groups = {AddGroup.class, UpdateGroup.class}) private String name; @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "position_id") private AdPosition position; @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "media_id") private MediaFile media; } @Data @AllArgsConstructor @NoArgsConstructor @Builder @Table(name = "ad_position") public class AdPosition { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Integer id; @ApiModelProperty(value = "位置名称") @NotBlank(message = "位置名称不可为空", groups = {AddGroup.class}) private String name; @OneToMany(mappedBy = "AdPosition", cascade = CascadeType.ALL) private List<Advert> adverts = new ArrayList<>(); } @Data @AllArgsConstructor @NoArgsConstructor @Builder @Table(name = "media_file") public class MediaFile { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Integer id; @ApiModelProperty(value = "媒体文件名称") private String fileName; @ApiModelProperty(value = "媒体文件类型") private Integer fileType; @ApiModelProperty(value = "媒体文件URL地址") private String fileUrl; @OneToMany(mappedBy = "MediaFile", cascade = CascadeType.ALL) private List<Advert> adverts = new ArrayList<>(); } public interface MyBaseMapper<T> extends Mapper<T>, MySqlMapper<T>,MyInsertListMapper<T> {} public interface AdvertMapper extends MyBaseMapper<Advert> {},如何保存一个advert对象
保存一个`Advert`对象可以通过使用`AdvertMapper`中的方法来实现,具体步骤如下:
1. 创建一个`Advert`对象,并设置其属性值:
```
Advert advert = new Advert();
advert.setName("广告名称");
// 设置关联属性
AdPosition position = new AdPosition();
position.setId(1); // 假设要关联的AdPosition的id为1
advert.setPosition(position);
MediaFile media = new MediaFile();
media.setId(2); // 假设要关联的MediaFile的id为2
advert.setMedia(media);
```
2. 调用`AdvertMapper`中的保存方法进行保存:
```
@Autowired
private AdvertMapper advertMapper;
// 保存Advert对象
advertMapper.insert(advert);
```
在保存时,由于`AdPosition`和`MediaFile`实体类中的`adverts`属性都使用了`mappedBy`属性,因此不需要再手动设置关联关系的另一侧。
另外,如果需要同时保存多个`Advert`对象,可以将它们放在一个`List<Advert>`中,然后使用`MyInsertListMapper`中的`batchInsert`方法来进行批量保存,例如:
```
List<Advert> adverts = new ArrayList<>();
// 添加多个Advert对象到adverts列表中
advertMapper.batchInsert(adverts);
```
@Data @AllArgsConstructor @NoArgsConstructor @Builder @Table(name = "advert") public class Advert { /** * 主键 / @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @ApiModelProperty(value = "广告唯一id") private Integer id; /* * 广告名称 / @ApiModelProperty(value = "广告名称") @NotBlank(message = "广告名称不可为空", groups = {AddGroup.class, UpdateGroup.class}) private String name; /* * 广告位置ID / @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "position_id") private AdPosition position; /* * 广告图片ID / @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "media_id") private MediaFile media; /* * 开始日期 / @Column(name = "start_date") @ApiModelProperty(value = "开始日期") @NotNull(message = "开始日期不可为空", groups = {AddGroup.class}) private Date startDate; /* * 结束日期 / @Column(name = "end_date") @ApiModelProperty(value = "结束日期") @NotNull(message = "结束日期不可为空", groups = {AddGroup.class}) private Date endDate; /* * 广告链接 / @ApiModelProperty(value = "广告链接") @NotBlank(message = "广告链接不可为空", groups = {AddGroup.class}) private String link; /* * 广告状态:0:未启用,1:已启用,2:已结束 / @ApiModelProperty(value = "广告状态") @NotNull(message = "广告状态不可为空", groups = {UpdateGroup.class}) private Integer status; /* * 创建时间 / @Column(name = "create_time") @ApiModelProperty(value = "创建时间") private Date createTime; /* * 更新时间 */ @Column(name = "update_time") @ApiModelProperty(value = "更新时间") private Date updateTime; }如何在使用basemapper的插入时给position和media赋值,正常赋值会报错Cause: java.sql.SQLException: Field 'position_id' doesn't have a default value ; Field 'position_id' doesn't have a default value; nested exception is java.sql.SQLException: Field 'position_id' doesn't have a default value
可以在插入时手动设置position和media的值,例如:
Advert advert = new Advert();
advert.setName("广告名称");
advert.setStartDate(new Date());
advert.setEndDate(new Date());
advert.setLink("广告链接");
advert.setStatus(0);
advert.setPosition(new AdPosition(1)); //手动设置position的值
advert.setMedia(new MediaFile(1)); //手动设置media的值
advertMapper.insert(advert);
其中,1为position和media对应的ID值。这样就可以成功插入数据了。
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