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https://issues.apache.org/struts/browse/WW-1257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Don Brown updated WW-1257:
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Fix Version/s: (was: 2.1.x)
2.2.x
> Added validation support to the ww:file tag
> -------------------------------------------
>
> Key: WW-1257
> URL: https://issues.apache.org/struts/browse/WW-1257
> Project: Struts 2
> Issue Type: Improvement
> Components: Plugin - Tags
> Affects Versions: WW 2.2.1
> Environment: n/a
> Reporter: Jeff Cunningham
> Assignee: Rainer Hermanns
> Priority: Minor
> Fix For: 2.2.x
>
>
> Hi...i added some error logic to my ww:file tag to support validation for the
> file tag. This enables users to make the filename required, or to make the
> filetype (by checking the suffix) match only certain types. For my case, I
> was able to make the filename required, and ensure the filename ended with
> .jpg
> I'm sure the code I added to the webwork tag can be improved..right now it
> takes advantage of the fact that webwork creates a String by appending
> FileName to the name of the File object int the action...knowing that
> simplified the code needed in the ww:file tag, and made it very easy to add
> validation logic that follows the normal webwork rules.
> Here is my modified ww:file component:
> <#assign filename = parameters.name + "FileName"/>
> <#assign hasFieldErrors = fieldErrors?exists && fieldErrors[filename]?exists/>
> <#if hasFieldErrors>
> <#list fieldErrors[filename] as error>
> <label class="feedback"><#rt/>
> ${error?html}
> </label><#t/>
> <br />
> </#list>
> <#t/>
> </#if>
> <input type="file"<#rt/>
> name="${parameters.name?default("")?html}"<#rt/>
> <#if parameters.get("size")?exists>
> size="${parameters.get("size")?html}"<#rt/>
> </#if>
> <#if parameters.nameValue?exists>
> value="<@ww.property value="parameters.nameValue"/>"<#rt/>
> </#if>
> <#if parameters.disabled?default(false)>
> disabled="disabled"<#rt/>
> </#if>
> <#if parameters.accept?exists>
> accept="${parameters.accept?html}"<#rt/>
> </#if>
> <#if parameters.tabindex?exists>
> tabindex="${parameters.tabindex?html}"<#rt/>
> </#if>
> <#if parameters.id?exists>
> id="${parameters.id?html}"<#rt/>
> </#if>
> <#if parameters.cssClass?exists>
> class="${parameters.cssClass?html}"<#rt/>
> </#if>
> <#if parameters.cssStyle?exists>
> style="${parameters.cssStyle?html}"<#rt/>
> </#if>
> <#include "/${parameters.templateDir}/simple/scripting-events.ftl" />
> />
> And here is an example snippet from a validation xml file. Note that the keys
> are stored in the property file for the action, and not included here. I
> obviously had a File object named file in my Action class...
> <field name="fileFileName">
> <field-validator type="requiredstring">
> <message key="form.error.fileFileName.required"/>
> </field-validator>
> <field-validator type="fieldexpression">
> <param name="expression">fileFileName.endsWith(".jpg")</param>
> <message key="form.error.fileFileName.fieldexpression"/>
> </field-validator>
> </field>
> Anyway..i thought adding the error logic to the file tag was fairly trivial,
> and would enable nice and simple validations like the above, with minimal
> work for the developer.
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