Hands-On Server-Side Web Development with Swift

Implementing the read operation

To read all of your records in a database, use query(on:) to query the database and all() to list all of them:

func getAll(_ req: Request) throws -> Future<View> {    return JournalEntry.query(on: req).all().flatMap(to: View.self) { entries in        let context = JournalContext(title: self.title,                                     author: self.author,                                     count: String(entries.count),                                     entries: entries)        let leaf = try req.make(LeafRenderer.self)        return leaf.render("main", context)    }}

If you know the ID of an item, you can use find(_:on:) instead of query(on:). The following code shows you how to retrieve an item by its id:

func getEntry(_ req: Request) throws -> Future<View> {    let id = try req.parameters.next(Int.self) return JournalEntry.find(id, on: req).flatMap(to: ...