Ch. 8.12 Part I - SwiftUI @FirestoreQuery - Adding & Viewing Reviews (Snacktacular app)

I've just noticed that there is an unaddressed issue in this app. Adding a new "Spot" causes a Firestore Error. Some additional code will check for this error. I'll post a work around for this problem, soon. So sorry if this has troubled anyone.

We'll use the FirebaseFirestoreSwift library and @FirestoreQuery in SwiftUI to load a collection of documents that's stored inside a document that's inside another collection. The way to do this is a bit obtuse, even though it's a task most developers will want to accomplish at some point. We'll also learn to prevent an error from the PreviewProvider, how to work with Sections of a ListView, and lots more!
Part of a university course by Prof. John Gallaugher designed for the absolute beginner, where students will learn to program using Swift + SwiftUI. The course will move from no assumed prior programming experience while students learn fundamental, then intermediate and advanced concepts, culminating in a full stack app. Full free course playlist at:
https://bit.ly/prof-g-swiftui
This course will roughly mirror the content covered in my UIKit course at https://bit.ly/prof-g-swift. Subscribe - many more videos coming soon!