字段重复性校验

在写业务的时候，经常会遇到对插入数据的某个字段进行重复性校验。为了规范书写，记录一下。

XXXMapper层

   /**
    * 检查部门名称是否重复
    * @param department
    * @return
    */
   int checkNameExist(Department department);

XXXMapper.xml层

<select id="checkNameExist" resultType="java.lang.Integer">
        SELECT count(depart_id)
        FROM department
        <where>
            is_deleted = 0
            <if test="departId !=null and departId !=''">
                AND depart_id != #{departId}
            </if>
            AND depart_name = #{departName}
        </where>
    </select>