This Gist demonstrates an approach to removing a specific user's data from an Amazon DynamoDB table that was created as an AWS AppSync data source. It may be helpful for those who need to remove records that are associated with a Cognito User that will be deleted from their Cognito User Pool.
Assuming you have this schema
| // | |
| // ExampleWindowReaderApp.swift | |
| // Shared | |
| // | |
| // Created by Matthaus Woolard on 21/12/2020. | |
| // | |
| import SwiftUI | |
| @main |
| import Foundation | |
| import CoreLocation | |
| // based on https://gis.stackexchange.com/a/18740 | |
| extension CLLocationCoordinate2D { | |
| var cartesian: CartesianCoordinate3D { .init(from: self) } | |
| // Returns the coordinates of the midpoint between point a and b. | |
| // Limitation: point a and b may not be diametrically opposite. |
| // | |
| // PagerView.swift | |
| // | |
| // Created by Majid Jabrayilov on 12/5/19. | |
| // Copyright © 2019 Majid Jabrayilov. All rights reserved. | |
| // | |
| import SwiftUI | |
| struct PagerView<Content: View>: View { | |
| let pageCount: Int |
| import MapKit | |
| extension MKCoordinateRegion { | |
| init?(coordinates: [CLLocationCoordinate2D]) { | |
| // first create a region centered around the prime meridian | |
| let primeRegion = MKCoordinateRegion.region(for: coordinates, transform: { $0 }, inverseTransform: { $0 }) | |
| // next create a region centered around the 180th meridian |
| # The trick is to link the DeviceSupport folder from the beta to the stable version. | |
| # sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :) | |
| # Support iOS 15 devices (Xcode 13.0) with Xcode 12.5: | |
| sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport | |
| # Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions | |
| # (A similar approach works for older versions too, just change the version number after DeviceSupport) |
| /** | |
| Writes a set of objects in the database. | |
| - parameter objects: Array of `Objects` to be stored on the database | |
| - parameter configuration: Realm `Configuration` in which the write action will be performed | |
| - parameter update: Enabled the custom *update* maintaining existing relationships | |
| */ | |
| static func write(objects : [Object], configuration: Realm.Configuration, update: Bool = false) { | |
| if let realm = try? Realm(configuration: configuration) { | |
| realm.beginWrite() |
| // #!Swift-1.1 | |
| import Foundation | |
| // MARK: - (1) classes | |
| // Solution 1: | |
| // - Use classes instead of struct | |
| // Issue: Violate the concept of moving model to the value layer | |
| // http://realm.io/news/andy-matuschak-controlling-complexity/ |
| #!/bin/bash | |
| # This script builds the iOS and Mac openSSL libraries | |
| # Download openssl http://www.openssl.org/source/ and place the tarball next to this script | |
| # Credits: | |
| # https://github.com/st3fan/ios-openssl | |
| # https://github.com/x2on/OpenSSL-for-iPhone/blob/master/build-libssl.sh | |