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// 假设有一个 QueryWrapper 对象,设置删除条件为 name = 'John Doe' QueryWrapper<User> queryWrapper = new QueryWrapper<>(); queryWrapper.eq("name", "John Doe"); boolean result = userService.remove(queryWrapper); // 调用 remove 方法
以上代码在修改name字段名或者删除name字段时,IDE均不会给出提示,容易产生问题,建议参照官网Mybatis生成方式,生成各模型类的Wrapper,内容如下: 比如当前模型类:
public class User { private long id; private String name; ... }
需要生成的对应的Wrapper类:
public class UserWrapper { private QueryWrapper<User> wrapper; public UserWrapper nameEq(String name) { wrapper.eq("name", name); return this; } // ... name字段的其他比较、like等方法 // ... 其他字段的方法... }
这样,在调用时,可以向下边一样:
UserWrapper queryWrapper = new UserWrapper(); queryWrapper.nameEq("John Doe"); boolean result = userService.remove(queryWrapper); // 调用 remove 方法
起到的效果是:当name字段修改或者删除后,可以在编译级别即IDE中很容易看到错误。 望采纳!
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可以用 LambdaQueryWrapper
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LambdaQueryWrapper不就满足你需要了。。
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以上代码在修改name字段名或者删除name字段时,IDE均不会给出提示,容易产生问题,建议参照官网Mybatis生成方式,生成各模型类的Wrapper,内容如下:
比如当前模型类:
需要生成的对应的Wrapper类:
这样,在调用时,可以向下边一样:
起到的效果是:当name字段修改或者删除后,可以在编译级别即IDE中很容易看到错误。
望采纳!
参考资料
No response
The text was updated successfully, but these errors were encountered: