https://community.appian.com/discussions/f/rules/4307/hello-i-m-creating-a-grid-that-has-a-grid-image-in-itHello, I&#39;m creating a grid that has a grid image in it. I want the grid image to display a document icon and represent a document, and when clicked the document will be downloaded. Currently my form breaks because if the document ID in the database isen-USTelligent Community 12https://community.appian.com/thread/15421?ContentTypeID=1Fri, 20 Feb 2015 02:33:55 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:900513ce-c8bc-4dce-8362-be2300d0684dissamdThat worked! Thank you so much!<div style="clear:both;"></div>https://community.appian.com/thread/15420?ContentTypeID=1Fri, 20 Feb 2015 02:28:41 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:bb009ba7-24df-4170-aa3a-82289accb771issamdHm, that&#39;s a good idea, I&#39;ll give that a try!<div style="clear:both;"></div>https://community.appian.com/thread/15419?ContentTypeID=1Fri, 20 Feb 2015 01:27:41 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:6a7fd5a8-7981-4054-bed9-4f1d464caabcTyler CristeYou need the link element of a!documentImage to be empty if a a docID is not found, right? In that case, you could use an expression rule to wrap a!documentDownloadLink and only return a link if docID is not nule. Your expression rule would look something like this:<br /><br />if(rule!APN_isBlank(ri!docID), {}, a!documentDownloadLink(document: ri!docID, label: {}))<br /><br />Then, you would apply over that rule instead of documentDownloadLink. So the last part of your expression (to generate the array of links) would be something like this:<br /><br />apply(<br /> rule!theRuleYouCreated,<br /> local!datasubset.data.FilingDocAppianDocID<br /> )<div style="clear:both;"></div>https://community.appian.com/thread/15418?ContentTypeID=1Fri, 20 Feb 2015 01:03:34 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:374d3b51-b4c6-4e83-8042-acf7baca2a76issamd...(<br /> rule!APN_replaceNull,<br /> property(<br /> local!datasubset.data,<br /> &quot;DocumentName&quot;,<br /> {}<br /> ),<br /> &quot;There is no document for this filing&quot;<br /> ),<br /> apply(<br /> a!documentDownloadLink(<br /> document: _,<br /> label: {}<br /> ),<br /> apply(<br /> rule!APN_replaceNull,<br /> local!datasubset.data.FilingDocAppianDocID,<br /> 0<br /> )<br /> )<br /> )<br /> )<br /> )<div style="clear:both;"></div>https://community.appian.com/thread/15417?ContentTypeID=1Fri, 20 Feb 2015 01:03:33 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:ce6171ed-674b-4836-80b1-e205fea1bd90issamd... _,<br /> link: _<br /> ),<br /> merge(<br /> repeat(<br /> if(<br /> local!lastPageRows &gt; cons!CATS_GRID_V_FILING_SUMMARY_INFO_BATCH_SIZE,<br /> cons!CATS_GRID_V_FILING_SUMMARY_INFO_BATCH_SIZE,<br /> local!lastPageRows<br /> ),<br /> a!iconIndicator(<br /> &quot;DOC_GENERIC&quot;<br /> )<br /> ),<br /> apply(<br /> rule!APN_replaceNull,<br /> property(<br /> local!datasubset.data,<br /> &quot;DocumentName&quot;,<br /> {}<br /> ),<br /> &quot;There is no document for this filing&quot;<br /> ),<br /> apply...<div style="clear:both;"></div>