Page template - Object reference not set to an instance of an object - kentico

I have a page template that has this line of code below:
<div id="<%= CurrentDocument.NodeAlias %>" class="lvl3">
Things work - the id value shows correctly. However, when using the Page Templates module Design tab, there's an error. In Event log, I saw the error message "Object reference not set to an instance of an object". Taking the id snippet out, the error is gone. I'm not sure what the error means and how to fix it. Could you help?
I do need some page-specific unique identifier in there (NodeAlias in this case) for other purposes.

The answer is pretty simple - if you open your page template in Kentico Page Templates application - your CurrentDocument is always null (because you are editing Template itself without specific document).
You could do absolutely the same thing in Pages application with the Design tab. It's also possible to edit all the template properties from there, including the Layout:

Using code blocks on page template layout is not supported. I assume you are using ASCX layout. Moreover your code looks more like a macro - so, maybe you are using HTML layout type? If yes, then the syntax should be {%CurrentDocument.NodeAlias%}
If you are using ASCX layout you may face also this issue: https://devnet.kentico.com/articles/the-controls-collection-cannot-be-modified-because-the-control-contains-code-blocks
Note that in portal engine the life cycle is bit modified, so we cannot ensure the code blocks will work every time - it may work sometimes. It mainly depends on what other web parts/controls and in what order are placed in the page template. I would rather recommend using the workaround from the article.
Or, you can give it a try, with no guarantee, this may work in certain cases, you need to specify the full namespace:
<%= CMS.MacroEngine.MacroResolver.Resolve("{%CurrentDocument.NodeAlias#%}") %>

Related

Kentico Widgets :: Matching fields with HTML structure of Web Part

I really hope I'm making sense with this one.
I'm trying to create a widget from a custom webpart that I created. It's nothing special at all as you can see:
<h3>Header</h3>
<p>Intro Copy</p>
<ul>
<li>List item one</li>
<li>List item two</li>
<li>List item three</li>
</ul>
I now want to be able to create a widget from this and create new fields that will be used to populate the above DOM. What do I need to do in order or do this.
In an example I saw for the demo site, they populated the bg image with:
style="background-image: url('{% ResolveUrl(PathToImage) %}');"
That was however done on the front facing part of the CMS and I'm trying to do it within the solution.
Any thoughts?
It's all in your layout or code behind. Your layout can have that code (but in ASCX format) and it will work just fine. OR you can add literal controls to the page based on the fields and what the user has entered.
Doing it in your layout is more restrictive and specific to that one application but allows you to use multiple new webpart layouts. Using the code approach allows you to be more dynamic but doesn't allow you to use the built-in layouts of the webpart/widget.
I would just use the Transformable Web Part in the Marketplace...it does exactly what you want it to do. Create a custom web part, and you use a Transformation to style the Web Part Properties into the DOM elements.
https://devnet.kentico.com/marketplace/web-parts/transformable-web-part
Reason why i built it!
I've done something similar in the past, using what I call generic web parts. I wrote a blog on it last year - it might help out with what I think you're trying to achieve:
http://www.mattnield.co.uk/Posts/Show/generic_web_parts_for_rapid_development
Why are you choosing to go with Widgets? If you want to access any field inside the transformation within the web part it's feasible by the same way as you define in inbuilt web parts.
If you want to perform any function like onload etc. then you need to use kentico API to access any data.
If you provide more insight on what is required, I can help further

Kentico 9 transformation page/file URL

In my custom page type, you can select an uploaded file. That's fine, but in my ascx transformation, i'm having a hard time getting the URL. The field is 'Process'.
Here's what i currently have.
<%# IfEmpty(Eval("Process"),"N/A","<a href=" + Eval("Process") +" target='blank' class='icon download'>Download</a>")%>
When rendered, the html is this:
Download
I'm missing something.
You can use either of the 2 methods below. Both have their downfalls though.
<a href="<%# GetFileUrl("Process", "Something") %>"Link here<a/> this will
Downfall with this is if there is no value in the "Process" field, it will return an invalid URL. So I tend to use something a little better (but not much)
Item to download
This will create a valid URL with some invalid properties to it. Meaning if there is no value in the Process field, it will return 00000000-0000-0000-0000-000000000000. If the NodeAlias field is empty, it will return "download". So again, not 100% fool-proof but it works well in most cases.
Update
Check out this link:
https://devnet.kentico.com/articles/options-for-file-fields-in-structured-data
I think the piece you need in here is in the "CMS.File page type" section:
This is the link to the picture
Check out transformation methods reference
You can use <%#GetImage(Eval("Process"))%>. This will return an Image tag. There are a couple other parameters for sizing if you want to use those.
See the "Transformation reference" link on your Trasnformation editor, it goes to all the available transformation methods you can use.
In it it shows:
This will generate an actual image tag. If however you want a link, it usually is
/getattachment/<%# Eval("TheImage")%>/ImageFileNameCanBeAnythingThough.jpg
example:
/getattachment/1936c69d-a28c-428a-90a7-09154918da0f/Christmas.jpg

How to #set a variable to make it available in an included velocity template

I'm creating a custom theme for Liferay, I wish to include the footer within each page layout individually. Unfortunately, I don't appear to have access to the $full_templates_path variable within the page layout files. I have had no luck manually storing the value with #set and then accessing that value within the included template.
In a vanilla theme, processing of files is something like this:
portal_normal.vm:
1) some init, doctype, etc.
2) #parse("$full_templates_path/header.vm")
3) $theme.include($content_include)
a) custom_layout_1.tpl
b) chat portlet
4) #parse("$full_templates_path/footer.vm")
For layout purposes, I need to deviate from this pattern, like so:
portal_normal.vm
1) some init, doctype, etc.
2) #parse("$full_templates_path/header.vm")
3) $theme.include($content_include)
a) custom_layout_1.tpl
i) #parse("$full_templates_path/footer.vm")
b) chat portlet
When I try this, tomcat errors out because $full_templates_path is not defined within custom_layout_1.tpl. I tried to fix this problem by doing the following within portal_normal.vm
#set($full_footer_path = "$full_templates_path/footer.vm")
$theme.include($content_include)
And then, within custom_layout_1.tpl, I do this where I'd like the footer markup emitted:
#parse("$full_footer_path")
However, tomcat still errors out, saying that $full_footer_path is not defined.
When I hard-code the value of $full_templates_path into #parse statement in custom_layout_1.tpl, everything works fine, but that seems like a hack to me.
Ideally, this should do the right thing for the right reasons, not just because I used a lot of duct tape.
Any suggestions for ways to implement the inclusion of a template file from within a custom page layout?
The issue could be due to your velocity configuration.
The following property should be false velocimacro.permissions.allow.inline.local.scope if you want to access variables set in one template to be accessible in another
You may have miss-typed your question but shouldn't #set($full_footer_path = "$full_templates_path/footer.vm" have a close bracket at the end...
#set( $full_footer_path = "$full_templates_path/footer.vm" )
It might also help to wrap $full_templates_path in curly braces to distinguish it from the rest of the text i.e ${full_templates_path}

How to use SuiteBarBrandingElement?

I am looking at the default master page in SharePoint 2013 (v15.master) and there is a server control there <SharePoint:SuiteBarBrandingElement runat="server"/> which on the page renders as 'SharePoint'. I can't figure out where to change it to something else (without writing code behind).
Information is thin, but there does not appear to be any UI-based way to get at this setting. But a setting it is (actually, a property on SPWebApplication).
Refer to this (unhelpful) documentation: SPWebApplication.SuiteBarBrandingElementHtml
Like you point out, you could write a solution to modify this property, but we can also use some PowerShell to get at it.
Executing this in the SharePoint 2013 Management Shell:
$app = Get-SPWebApplication http://my.sp2013.site/
$app.SuiteBarBrandingElementHtml
Yields this output:
<div class="ms-core-brandingText">SharePoint</div>
This means that we can just assign a new value here:
$app.SuiteBarBrandingElementHtml = '<div class="ms-core-brandingText">Hello World!</div>'
$app.Update()
That aside, it would be pretty handy to build a solution that exposed the property via the Admin UI to update it. I don't know why Microsoft didn't provide this out of the box; it seems like that was the intention (at some point).

Expression Engine template variable passing

I'm building in Expression Engine 2.3 a user profile system using Solspace's User and Friends modules. They work fine, but I'm having an incredibly difficult time with passing embedded variables around.
I've got a .profile_head template that's called from each template. The profile page, the friends page, the private messaging page, etc. It builds a user navigation, displays the avatar, all the common user stuff. All of this is based off of the user ID passed through {segment_3}. This allows me to display a different user's info by changing this segment.
The problem is doing this makes my URLs far too precise. I can't have users going to /users, they have to go to /users/profile/UID or the best possible scenario is an error page or redirect to the home page.
I tried to solve this problem through variables in my template:
{embed="/users/.profile_head" uid="{segment_3}"}
or......
{embed="/users/.profile_head" uid="{logged_in_member_id}"}
In the .profile_head template file, I can print out {embed:uid} just fine, but when I try to assign it to anything (i.e. a loop or another template), it breaks:
<!-- /users/.profile_head -->
{exp:friends:members member_id="{embed:uid}" dynamic="off" limit="1"}
or.....
{embed="users/.profile_column" uid="{embed:uid}"}
For instance, if {embed:uid} is set as {logged_in_member_id}, I get the following error:
Parse error: syntax error, unexpected T_LNUMBER in /var/www/system/expressionengine/libraries/Functions.php(656) : eval()'d code on line 9
This is line 9:
{if logged_in_member_id == "{embed:uid}"} <span class="this_is_you">This is you!</span>{/if}
I really am at my wits end. I need to be able to use this profile header in templates without requiring a user id in the URL for things like the user messaging and settings pages. But nothing I try seems to be working in the least.
I believe that {logged_in_member_id} is a late-parsed variable, which means it may not be available in some of your tags at the point they're processed - hence it's passed as literally {logged_in_member_id}.
Try using the CURRENT_USER constant instead.

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