Error Description:
SQL statement appears
Error evaluating expression ' "Cause.: Org.apache.ibatis.ognl.OgnlException: source is null for getProperty (null," category.id = null and category.id =!!' Id ")
Cause: The
exception is really happening when Mybatils perform the mapping process, the attribute "XXX" can not find the owner calls his objects (NULL), it throws an exception
Solution:
In the corresponding XXXMapper.xml judgment in a step by step field (property) owner is empty
from the original owner of the field began to judgment (judgment must first category can not be empty), to avoid a null pointer, in order to continue following judgment
<li class="tool-item tool-active is-like "><a href="javascript:;"><svg class="icon" aria-hidden="true">
<use xlink:href="#csdnc-thumbsup"></use>
</svg><span class="name">点赞</span>
<span class="count">2</span>
</a></li>
<li class="tool-item tool-active is-collection "><a href="javascript:;" data-report-click="{"mod":"popu_824"}"><svg class="icon" aria-hidden="true">
<use xlink:href="#icon-csdnc-Collection-G"></use>
</svg><span class="name">收藏</span></a></li>
<li class="tool-item tool-active is-share"><a href="javascript:;"><svg class="icon" aria-hidden="true">
<use xlink:href="#icon-csdnc-fenxiang"></use>
</svg>分享</a></li>
<!--打赏开始-->
<!--打赏结束-->
<li class="tool-item tool-more">
<a>
<svg t="1575545411852" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5717" xmlns:xlink="http://www.w3.org/1999/xlink" width="200" height="200"><defs><style type="text/css"></style></defs><path d="M179.176 499.222m-113.245 0a113.245 113.245 0 1 0 226.49 0 113.245 113.245 0 1 0-226.49 0Z" p-id="5718"></path><path d="M509.684 499.222m-113.245 0a113.245 113.245 0 1 0 226.49 0 113.245 113.245 0 1 0-226.49 0Z" p-id="5719"></path><path d="M846.175 499.222m-113.245 0a113.245 113.245 0 1 0 226.49 0 113.245 113.245 0 1 0-226.49 0Z" p-id="5720"></path></svg>
</a>
<ul class="more-box">
<li class="item"><a class="article-report">文章举报</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div class="person-messagebox">
<div class="left-message"><a href="https://blog.csdn.net/Skye_H">
<img src="https://profile.csdnimg.cn/3/D/1/3_skye_h" class="avatar_pic" username="Skye_H">
<img src="https://g.csdnimg.cn/static/user-reg-year/2x/2.png" class="user-years">
</a></div>
<div class="middle-message">
<div class="title"><span class="tit"><a href="https://blog.csdn.net/Skye_H" data-report-click="{"mod":"popu_379"}" target="_blank">Skye_H</a></span>
</div>
<div class="text"><span>发布了42 篇原创文章</span> · <span>获赞 9</span> · <span>访问量 5万+</span></div>
</div>
<div class="right-message">
<a href="https://im.csdn.net/im/main.html?userName=Skye_H" target="_blank" class="btn btn-sm btn-red-hollow bt-button personal-letter">私信
</a>
<a class="btn btn-sm bt-button personal-watch" data-report-click="{"mod":"popu_379"}">关注</a>
</div>
</div>
</div>
Error Description:
SQL statement appears
Error evaluating expression ' "Cause.: Org.apache.ibatis.ognl.OgnlException: source is null for getProperty (null," category.id = null and category.id =!!' Id ")