In a community I want to access to a knowledge article by a link. I have something like this :
href="{!'/c/article/' + currentFile.urlName}"
with currentFile.urlName that is the KnowledgeArticleVersion.UrlName.
Concretely, the url look like this :
https://my-org-salesforce.cs88.force.com/c/article/test-lightning
But when I click it I got the error
URL No Longer Exists
Yes, is possible if you create a visualforce page for displaying the articles, then you could store the result of that action on a 'feedback' object.
To add a change the 'template' behind an article, go to the article type you wish to modify and select the visualforce page you have created (see Screenshot).
To be able to select the page, the page needs to use the current article type as standard controller.
For most internal pages (behind authentication) within a community, if you attempt to hit the page unauthenticated, you are prompted to authenticate and then redirected to the page your were attempting to access. For some reason however, Knowledge does not work that way. If you attempt to access a Knowledge article that requires authentication and that is not exposed to the Public Knowledge Base, you receive a 404 and not a login prompt. If you wanted to create an IdeaExchange idea around this, I think it's a good one.
Therefore the only way to accomplish this is with your own creative workaround. You'll want to create a Visualforce page that handles the unauthenticated redirect, call it KnowledgeRedirect or something. This page will need to be exposed via the communities Sites settings to unauthenticated users (via Public Access Settings for the VF page). The page would accept a querystring parameter that is either the id or name of your knowledge article (some unique identifier). On hitting the page with that querystring param, you would first check to see if the user is authenticated. This should suffice in apex:
if (UserInfo.getUserType()=='Guest') {
//redirect to the login page with the querystring param on the startUrl or retUrl, I can't recall, one of those
} else {
//redirect to the knowledge article
}
Best Answer
In Napili URL should be:
https://my-org-salesforce.cs88.force.com/s/article/test-lightning
You can verify that it from community builder.
It's constructed as:
<Community base URL>+'/s/'+'/article/'+<articleURLname>