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# 组件源码 ``` /** * <b>方法描述:</b> 删除(按Entity) <br/> * <b>创建者:</b> admin <br/> * <b>创建时间:</b> 2020-09-14 11:46:05 <br/> * * @param poolName * 入参|数据源名称|{@link java.lang.String} * @param className * 入参|执行操作类名|{@link java.lang.String} * @param entity * 入参|实体条件|{@link com.baomidou.mybatisplus.extension.activerecord.Model} * @param count * 出参|处理条数|{@link int} * @return -1 异常<br/> * 0 失败<br/> * 1 成功<br/> */ @Component(label = "删除(Entity)", style = "判断型", type = "同步组件", comment = "根据数据库实体类的赋值字段进行条件查询。", version = "1.0.0", deprecated = false, author = "admin", date = "2020-09-14 11:46:05") @InParams(param = {@Param(name = "poolName", comment = "数据源名称", type = java.lang.String.class), @Param(name = "className", comment = "执行操作类名", type = java.lang.String.class), @Param(name = "entity", comment = "实体条件", type = com.baomidou.mybatisplus.extension.activerecord.Model.class)}) @OutParams(param = {@Param(name = "count", comment = "处理条数", type = int.class)}) @Returns( returns = {@Return(id = "-1", desp = "异常"), @Return(id = "0", desp = "失败"), @Return(id = "1", desp = "成功")}) public static ResultBase P_deleteByWrapper(String poolName, String className, Model entity) { try { AppLog.debug("根据字段 删除数据 组件参数:poolName={},className={},map={}", poolName, className, entity); if (StringUtil.isEmpty(className)) { return ResultBase.newFailureResult("TPTD0001", "参数错误:执行类参数【className】不能为空"); } if (entity == null || !(entity instanceof Model)) { return ResultBase.newFailureResult("TPTD0010", "参数错误:条件类【entity】不能为空,且必须为数据库对应实体类"); } setDatasource(poolName); Object maper = BundleUtil.getService(className); if (maper == null) { return ResultBase.newFailureResult("TPTD0010", "错误:当前环境未找到[" + className + "]的可用数据库操作Mapper 实例"); } Method method = getMethod(maper.getClass(), className, MybatisPlusMapperMehtod.delete); if (method != null) { AppLog.debug("开始执行相应的Mapper 方法"); Wrapper w = Wrappers.update(entity); return ResultBase.newSuccessResult(method.invoke(maper, w)); } } catch (Exception e) { AppLog.error(e); return ResultBase.newExceptionResult("TPTD0003", "方法调用错误,类:" + className + "调用:deleteByPrimaryKey 方法错误" + AppLog.errorMsg(e)); } return ResultBase.newFailureResult("TPTD0004", "方法调用错误,类:" + className + "没有可执行方法:deleteByPrimaryKey"); } ``` # 交易中组件使用方式 ![](https://img.kancloud.cn/a7/93/a7936aa59605164e39ebb1e9f245cfd9_1868x895.png) # 参数说明及示例 ## 入口参数 数据源名称:使用的数据源名称,可以为空 执行操作类名:执行 SQL 语句的类,示例: `"data.test.test.mapper.TUserMapper"` 实体条件:根据数据库实体类的赋值字段进行条件删除,示例: `__INNER__["user"]` ## 出口参数 处理条数:成功删除的记录数,示例: `__INNER__["result"]` > 当交易部署到微服务上时,数据源在微服务界面上配置。