Basic CRUD with Vapor - Swift

CRUDVapor.swift

import Vapor

/// Register your application's routes here.
public func routes(_ router: Router) throws {

    // Saving models
    router.post("api", "acronyms") { req -> Future<Acronym> in
        return try req.content.decode(Acronym.self)
            .flatMap(to: Acronym.self) { acronym in
                return acronym.save(on: req)
        }
    }
    
    // Retrieve all acronyms
    router.get("api", "acronyms") { (req) -> Future<[Acronym]> in
        return Acronym.query(on: req).all()
    }
    
    // Retrieve a single acronym
    router.get("api", "acronyms", Acronym.parameter) {
        req -> Future<Acronym> in
        return try req.parameters.next(Acronym.self)
    }
    
    // Update
    router.put("api", "acronyms", Acronym.parameter) {
        req -> Future<Acronym> in
        // Use flatMap(to:_:_:), the dual future form of flatMap, to wait for both the parameter extraction and content decoding to complete. This provides both the acronym from the database and acronym from the request body to the closure.
        return try flatMap(to: Acronym.self, req.parameters.next(Acronym.self), req.content.decode(Acronym.self)) {
            acronym, updatedAcronym in
            
            acronym.short = updatedAcronym.short
            acronym.long = updatedAcronym.long
            
            return acronym.save(on: req)
        }
    }
    
    // Delete
    router.delete("api", "acronyms", Acronym.parameter) { req -> Future<HTTPStatus> in
        return try req.parameters.next(Acronym.self).delete(on: req).transform(to: HTTPStatus.noContent)
    }
}