JeeSite 删除数据拦截

单表操作删除时，默认框架已提供了，但有时候需要根据条件判断是否允许删除；如，客户表，如果客户信息已被使用，而不允许被删除。

方法同数据唯一性验证，查询关联表是否有引用记录，并统计数量，大于 0，则不允许删除。

CustomerDao.xml 中增加查询方法

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.jeesite.modules.customer.dao.CustomerDao">
    
    <!-- 查询数据
    <select id="findList" resultType="Customer">
        SELECT ${sqlMap.column.toSql()}
        FROM ${sqlMap.table.toSql()}
        <where>
            ${sqlMap.where.toSql()}
        </where>
        ORDER BY ${sqlMap.order.toSql()}
    </select> -->

    <select id="getOrderReviewNum" resultType="Long">
        SELECT
            count(0)
        FROM
            `product_order_review` a
        where a.status =0 AND a.customer_code = #{customerCode}
            LIMIT 1
    </select>

    <select id="getOrderNum" resultType="Long">
        SELECT
            count(0)
        FROM
            `product_work_order` a
        where a.status =0 AND a.customer_code = #{customerCode}
            LIMIT 1
    </select>

    <select id="getTransportNum" resultType="Long">
        SELECT
            count(0)
        FROM
            `product_transport` a
        where a.customer_code = #{customerCode}
            LIMIT 1
    </select>

</mapper>

CustomerDao.java 文件中，增加

    Long getOrderReviewNum(String customerCode);
    Long getOrderNum(String customerCode);
    Long getTransportNum(String customerCode);

CustomerService.java 中增加及调整 delete 方法

@Autowired
private CustomerDao customerDao;

/**
 * 删除数据
 *
 * @param customer
 */
@Override
@Transactional
public void delete(Customer customer) {
    if (checkCustomerIsUse(customer.getCustomerCode())) {
        throw new RuntimeException("客户已被使用，不能被删除");
    }
    super.delete(customer);
}


public Long getOrderReviewNum(String customerCode) {
    return customerDao.getOrderReviewNum(customerCode);
}

public Long getOrderNum(String customerCode) {
    return customerDao.getOrderNum(customerCode);
}

public Long getTransportNum(String customerCode) {
    return customerDao.getTransportNum(customerCode);
}

public boolean checkCustomerIsUse(String customerCode) {
    if (getOrderReviewNum(customerCode) > 0) return true;
    if (getOrderNum(customerCode) > 0) return true;
    if (getTransportNum(customerCode) > 0) return true;

    return false;
}

CustomerController.java 控制器中，调整 delete 方法

/**
 * 删除数据
 */
@RequiresPermissions("customer:customer:edit")
@RequestMapping(value = "delete")
@ResponseBody
public String delete(Customer customer) {
    try {
        customerService.delete(customer);
        return renderResult(Global.TRUE, text("删除客户信息成功！"));
    } catch (RuntimeException e) {
        return renderResult(Global.FALSE, text(e.getMessage()));
    }
}