Lesson 12 of Module 1 of the CWC+ iOS Database course covers compound queries. This is something I used all the time with MySQL / MariaDB. I’m rather bemused to discover that we can’t actually do compound queries “as-is”. We have to create them outside of the code first. Either […]
Monthly archives: April 2022
47 posts
I, naturally, used queries a lot in the days of MySQL / MariaDB on my web databases, so Lesson 11 from Module 1 of the CWC+ iOS Database course was always going to be one that I looked forward to. Google has ensured that querying databases is pretty much as […]
I’m starting to feel that Google has made Firestore excessively easy for app developers. That’s both a good thing and a bad thing. It’s a good thing because it enables us to get up and running with databases without requiring a massive amount of complex knowledge. But it’s also a […]
I’ve noticed an error warning keeps cropping up in Xcode‘s output console when doing the iOS Database lessons and challenges. Until now it hasn’t really been an issue, but in the latest challenge it is. This is the error message: 2022-04-17 17:21:47.365853+0100 Firebase Demo[11383:331544] 8.15.0 - [Firebase/Firestore][I-FST000001] WatchStream (7faddcc0ad88) Stream […]
Lesson 10 from Module 1 of the CWC+ iOS Database course teaches us how to be notified of changes to our Firestore collections and databases. This code would notify us of any changes in the collection. Every time the collection changes, the completion handler will run. When we’re done with […]
Lesson 9 from Module 1 of the CWC+ iOS Database course covers reading data back from Firestore. To read back a single document, we can do this: Or, we can iterate through all documents, thus: Seems fairly straightfoward so far.
Lesson 8 from Module 1 of the CWC+ iOS Database course shows us how we can use completion handlers to check for errors when we interract with Firestore. We can use this when we try to delete a document, re: When updating a document, re: Just keeping this here to […]
Following on from the previous lesson, this short video teaches us the different ways we can delete records (documents) and key-value pairs from our Firebase. We can use the .updateData modifier to delete individual key-value pairs, thus: To delete the entire document, we would use the .delete() modifier thus: It’s […]