Resultant Systems

For most websites it’s usually a good idea to have error pages that have user-friendly error messages that are styled to look like the rest of the site.  Also, you may want to send yourself an eMail when an error happens. Read on to see how to make this work.

For the DonorUp website, I used CFWheels and the Splash CMS. Once I knew the tricks, it turned out to be really easy to make this work. So, I decided to write a post to explain what you need to know.

Typically, in ColdFusion, you add an onError() method to your Application.cfc file. Wheels gives you various hooks into Application.cfc, but Wheels already has an onError() method. So, you can’t add another one! Fortunately, Wheels has an easy way to handle most errors.

How to send error messages from CFWheels

All you have to do to get Wheels to send error message emails  is add the following into your /config/settings.cfm file:

<cfset set(sendEmailOnError = true)>
<cfset set(errorEmailAddress = “you@yourServer.com”)>

Now, whenever there’s an error, you’ll get a really nice email with all the troubleshooting info you’ll need. Easy!

How to setup a custom error page in CFWheels or Splash

As part of its built-in error handling, Wheels runs the file at /events/onerror.cfm. Just put a redirect to your error page at the top of onerror.cfm and you’re done:

<cfset redirectTo(route=”viewer”, slug=”error-page”)>

In my case, I went into the Splash CMS admin and added a page called Error Page. This way, the page is automatically styled to match the rest of the site. The error page apologizes to the user for the error, and let’s them know I am going to fix it!

When Wheels does its error handling, it will run /events/onerror.cfm, and the redirectTo() will send them to my error page! If you aren’t running Splash, you could just use the other arguments of redirectTo() to send them to any controller and action.

You can also put your own HTML or CFML code in onerror.cfm, but I like doing it this way better as it uses all the layouts and styling of my site!

Please leave me a comment if you like this approach or have other ideas!

Clarke Bishop CFWheels, ColdFusion, Splash CMS CFWheels, Splash CMS

Mura has a lot of interesting capabilities. However, the documentation is a little sparse.

Recently, I have been customizing a Mura site, so I thought I’d document some of the key things you need to know!

1 – Create a New Site to Customize

When initially installed, Mura automatically creates the  “Default” site. But, don’t customize this site. Make a new site and customize it. This way, you can still do Mura updates without overwriting your customizations.

• Login to your admin area
• Go to Site Settings -> Add New Site. (Site Settings is in the upper right of the admin screen.)
• Name the site whatever you want. For example, you might call it MySite.
• Now, when you go to customize things, don’t look in the Default folder. Instead find the MySite folder.
• If you want MySite to come up automatically when you go to www.YourDomain.com, click on Site Settings. Then, use the Order drop downs to set MySite to 1.

2 – Customize /MySite/includes/

Much of what you’ll want to customize is in the /MySite/Includes/ directory. Here are some things you might want to customize:

• If you are using a theme like Merced, customize the style sheet at /MySite/includes/themes/merced/css/site.css. It’s a good idea not to change the other style sheets. Just override the style in site.css. More Info from Mura …
• Again, if you’re using Merced or another theme, customize the templates at /MySite/includes/themes/merced/templates/.  Don’t forget to look in the /inc folder for the header and footer includes. More Info from Mura …

3 – Change the behavior of Display Objects

You can change how the Display Objects work! For many Display Objects, you can just copy the display object, put it in /MySite/includes/display_objects/custom/ and modify your copy. I wanted to add a download link to the images in the image gallery, so it was more complicated. Matt Levine of Mura advised me to:

• Go get /MySite/includes/eventHandler.cfc and add a new onGalleryBodyRender function (See below).
• Create a new directory named gallery at /MySite/includes/display_objects/custom/gallery. Into this new directory, copy index.cfm from /default/includes/display_objects/gallery/index.cfm. Now we have a copy of the gallery file to customize, so customize your heart out!
• Stay in /gallery/index.cfm. Find the references to getSite() and queryPermFilter() method calls. Change these to renderer.getSite() and renderer.queryPermFilter().
• Still in /gallery/index.cfm, change the template path in <cfinclude template=”../dsp_nextN.cfm”>. The new path should be ../../../dsp_nextN.cfm.
• Reload the app either by clicking Reload Application in the admin, or adding ?appreload to the end of the url. A lot of the objects are loaded when the application starts, so I found it’s a good idea to reload after making changes.

Here’s the code for the updated eventHandler.cfc:

[cf]

<cffunction name="onGalleryBodyRender" output="true" returntype="void">
<cfargument name="event">
<cfset var renderer=event.getContentRenderer()>
<cfsilent>
<cfset renderer.loadShadowBoxJS() />
<cfset renderer.addToHTMLHeadQueue("custom/gallery/htmlhead/gallery.cfm")>
<cfif not event.valueExists(‘galleryItemID’)><cfset event.setValue(‘galleryItemID’,”)></cfif>
</cfsilent>

<!— When you override default output you need to run content throught the renderer.setDynamicContent() method to process [mura] tag calls—>
<cfoutput>#renderer.setDynamicContent(event.getValue(‘contentBean’).getBody())#</cfoutput>

<!— Now include the customized display object —>
<cf_CacheOMatic key="portalBody#event.getValue(‘contentBean’).getcontentID()##event.getValue(’startRow’)##event.getValue(‘galleryItemID’)#" nocache="#event.getValue(‘r’).restrict#">
<cfinclude template="display_objects/custom/gallery/index.cfm">
</cf_CacheOMatic>

</cffunction>
[/cf]

I hope this helps someone get started with Mura! If you have suggestions for improving this information or just have a question, please leave a comment.

Clarke Bishop ColdFusion, Mura ColdFusion, Mura