我遇到问题，我的ColdFusion代码返回“元素AUTHOR在FORM中未定义”。每当我提交表格时我已经尝试使用<cfparam>来设置comment.author，但它也没有用。我对ColdFusion很新，所以任何推理评论都会很棒！
<cfparam name="form.submitted" default="0" />
<cfset blogPost = EntityLoad('BlogPost',url.id,true) />
<cfif form.submitted>
<cfset comment = EntityNew('BlogComment') />
<cfset comment.author = form.author />
<cfset comment.comment = form.comment />
<cfset comment.createdDateTime = now() />
<cfset blogPost.addComment(comment) />
<cfset EntitySave(blogPost) />
</cfif>
<cfimport taglib="customTags/" prefix="layout" />
<layout:page section="blog">
<!-- Content Start -->
<!--Card -->
<div id="content">
<div class="card-pattern">
<!-- blog -->
<div id="blog">
<div class="clr">
<div class="top-bg1">
<div class="top-left">
<div><h1>Blog</h1></div>
</div>
</div>
<div class="clr">
<div class="pat-bottomleft"> </div>
<div class="pat-bottomright"> </div>
</div>
</div>
<div class="blog-top">
<div class="clr">
<cfoutput>
<div class="left">
<!-- Blog Title -->
<h2 class="big">
#blogPost.title#
</h2>
<!-- Date Published -->
<h5>
<strong>Date Posted</strong>: #dateformat(blogPost.dateposted,'mm/dd/yyyy')#
</h5>
<!-- Blog Body -->
#blogPost.body#
<!-- Blog Export -->
<p>
<a href="exportToPDF.html?id=#blogPost.id#" target="_new"><img src="assets/images/export_pdf.png" border="0"/></a>
</p>
<!-- Blog Comments Section -->
<h3>
Comments #arrayLen(blogPost.getComments())#
</h3>
<div class="clr hline"> </div>
<div class="clr comments">
<ul>
<!-- Start Comment -->
<cfloop array="#blogPost.getComments()#" index="comment">
<li>
<p>
<strong>Posted On:</strong> #dateFormat(comment.createdDateTime,'mm/dd/yyyy')# at #timeformat(comment.createdDateTime,'short')# By #comment.author#
</p>
<p>
#comment.comment#
</p>
<div class="clr hline"> </div>
</li>
</cfloop>
<!-- End Comment -->
</ul>
</div>
<h3>
Post Comment
</h3>
<div class="clr hline"> </div>
<div class="clr postComment">
<form action="BlogPost.cfm?id=#blogPost.id#" method="post" id="form">
<div>
<label>Name <span class="font-11">(required)</span></label>
<input name="contactname" type="text" class="required" />
</div>
<div class="textarea">
<label>Comment <span class="font-11">(required)</span></label>
<textarea name="comment" rows="6" cols="60" class="required"></textarea>
</div>
<div>
<input id="submitBtn" value="Submit" name="submit" type="submit" class="submitBtn" />
</div>
<input type="hidden" name="submitted" value="1" />
</form>
</div>
</div>
</cfoutput>
<div class="right" >
<h2>Categories</h2>
<!-- Blog Specific Categories -->
<div id="categories" align="center">
<ul>
<li><a href="#">ColdFusion</a></li>
<li><a href="#">Development</a></li>
</ul>
</div>
</div>
</div>
</div>
<div class="clr"></div>
</div> <!--blog end -->
</layout:page>
错误告诉你出了什么问题。表单中没有author元素，或者根本没有表单范围。这是您发布的表单代码：
<form action="BlogPost.cfm?id=#blogPost.id#" method="post" id="form">
<div>
<label>Name <span class="font-11">(required)</span></label>
<input name="contactname" type="text" class="required" />
</div>
<div class="textarea">
<label>Comment <span class="font-11">(required)</span></label>
<textarea name="comment" rows="6" cols="60" class="required"></textarea>
</div>
<div>
<input id="submitBtn" value="Submit" name="submit" type="submit" class="submitBtn" />
</div>
<input type="hidden" name="submitted" value="1" />
</form>
它只包含4个元素：contactname，comment，submit和submitted。这意味着在提交表单后，ColdFusion将可以访问：form.contactname，form.comment，form.submit和form.submitted。我假设您正在尝试将comment.author变量设置为contactname表单字段。
您可以在设置变量的位置更改代码，如下所示：
<cfset comment.author = form.contactname />
或者您可以更改定义表单字段的代码，如下所示：
<input name="author" type="text" class="required" />
无论哪种方式，对form范围的引用必须与您在HTML表单中提供的名称相匹配。对于它的价值，您可以在提交后查看form范围，以查看可用的范围，如下所示：
<cfdump var="#form#">
还要记住清理从客户端收到的所有数据。
How can I sanitize user input but keep the content of <pre> tags?
同意，未定义，因为它不存在于表单中。
并且绝对清理所有表单和网址数据。以下一个例子：
<cfset myVar = ReReplaceNoCase(#FORM.formfield#,"<[^>]*>","","ALL")/>