Appian Community and Appian Academy are being upgraded. As a part of the upgrade, Appian Community is currently in read-only mode, and user registration is disabled until August 3. We apologize for any inconvenience this may cause, but a more secure, stable, and performant Community experience is coming soon!
The new Appian Community launches August 3, followed by Appian Academy on August 7. During the migration, Appian Community Edition, Appian Academy, Documentation, Certifications, Instructor-led Customer Training, Partner Sales Training & Accreditation, and Forum (for Appian Partners and Customers only) will remain available.
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Let's take a moment and understand what actually is supported in the portals and what is not.
If I explain to you in simple language, when you publish a portal, it takes all of your interface code and pushes it to another server. Now when you want to use objects inside the interface that would require Appian's engines to evaluate, then it will not work unless you bring Appian connectivity in picture using a service account. It seems like you will have to connect Appian to Appian, but in reality, you will be connecting that public site (portal) to Appian.
Decisions are very easily replaceable in Appian using if(), index(), choose() or match() or a combination of these. You can write your logic in the interface itself.