Persistable Database Views

[groue]

This pull request enhances support for record types that target a database view. It is now possible to instruct GRDB about the primary key of a view, and this unlocks both reads and writes that used to throw a database error.

See View Records.

// A record that targets the "captain" database view:
struct Captain: Codable, Identifiable, FetchableRecord, PersistableRecord {
    var id: String
    var name: String
    var teamId: String
}

// Now possible:
var bob = try Captain.find(db, id: "bob")
try captain.updateChanges(db) {
    $0.name = "Bobby"
    $0.teamId = "red"
}

Original discussion: #1809

[stevensJourney]

Thanks for the awesome work @groue! I've tested this for PowerSync on our end with some basic queries. We're still ironing out some unrelated kinks in our PowerSync integration, but so far this works perfectly for us.

[groue]

Thank you for the good news, @stevensJourney! 👍 Unless you tell me otherwise, I'll merge this PR shortly!

[groue]

⛵ Shipped in v7.7.0!