You could give the following a try.
<span jwcid="@If" condition="ognl:components.table.tableRow.creationDate != null"> <span jwcid="createDateFormat"/> </span> The documentation on the If component is at http://tapestry.apache.org/tapestry4/tapestry/ComponentReference/If.html Shing --- Manuel Thurn <[EMAIL PROTECTED]> wrote: > Thank you very much for your answer. > > I realized that my attempt to format a null Date was > the reason for the > exception. Without the formatting component (with > the id > "creationDateFormat") an empty string is displayed. > > Despite the possible drawback I'd like to try your > suggestion. I would be > very happy if someone gave me a hint how to code the > If component in > combination with the ognl syntax to catch the null > Date. > > Here again the mentioned code snippet: > <component id="creationDateFormat" type="Insert"> > <binding name="value" > value="components.table.tableRow.creationDate.time"/> > <binding name="format" value="dateFormat"/> > </component> > > Manuel > > -----Original Message----- > From: Shing Hing Man [mailto:[EMAIL PROTECTED] > Sent: Freitag, 23. Juni 2006 06:53 > To: Tapestry users > Subject: Re: Null Date in a Contrib:Table > > Have you consider wrapping your component > 'creationDateFormat' with an If component - so that > the date is only rendered if it is not null ? > > There might be a drawback with the above approach. > The > default sorting on your date column might not work. > > Shing > > > --- Manuel Thurn <[EMAIL PROTECTED]> wrote: > > > Hi! > > > > > > > > For a project I want to display a list of objects > in > > an html table. I'm > > using the Table component of the contrib library > of > > Tapestry. One column > > should show a formatted Date (or Calendar) object. > > It works fine as long as > > the Date is not null. But if the database contains > > objects with null values > > I get the following Exception: > > > > > > > > Unable to read OGNL expression.: source is null > for > > getProperty(null, > > "tableRow") > > > > > > > > Here is a snippet of the .page file. creationDate > is > > a Calendar object. To > > format it I get the Date with getTime() and use > the > > format parameter of the > > Insert component. > > > > > > > > <component id="campaignTable" > type="Contrib:Table"> > > > > <binding name="source" value="dataItems"/> > > > > <binding name="columns" value="literal:name, > > description, creationDate"/> > > > > </component> > > > > > > > > <component id="creationDateFormat" type="Insert"> > > > > <binding name="value" > > > value="components.table.tableRow.creationDate.time"/> > > > > <binding name="format" value="dateFormat"/> > > > > </component> > > > > > > > > I would be happy if you could help me find a way > to > > handle this exception. > > > > > > > > Thanks, > > > > > > > > Manuel > > > > > > > > > > > Home page : > http://uk.geocities.com/matmsh/index.html > > > > ___________________________________________________________ > > Try the all-new Yahoo! Mail. "The New Version is > radically easier to use" - > The Wall Street Journal > http://uk.docs.yahoo.com/nowyoucan.html > > --------------------------------------------------------------------- > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: > [EMAIL PROTECTED] > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: > [EMAIL PROTECTED] > > Home page : http://uk.geocities.com/matmsh/index.html ___________________________________________________________ Copy addresses and emails from any email account to Yahoo! Mail - quick, easy and free. http://uk.docs.yahoo.com/trueswitch2.html --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
