接上篇使用 Swift Vapor 对数据库进行简单的操作。
下面会使用一个稍微简单的方式进行 CURD 操作
bash
import Fluent
import Vapor
struct SongController: RouteCollection {
func boot(routes: Vapor.RoutesBuilder) throws {
let songs = routes.grouped("songs")
// GET http://127.0.0.1:8080/songs
// 获取所有列表
songs.get(use: index)
// POST http://127.0.0.1:8080/songs
// 单个插入
// 参数如下:
// {
// "title": "ka qiu sha"
// }
songs.post(use: create)
// http://127.0.0.1:8080/songs/A73796AE-D7DE-4042-AD08-2194FBE4C0BA
// GET /users/:userID(这个:userID 是真实的 id)
// 更加id 获取单条信息
songs.get(":songID", use: show)
// http://127.0.0.1:8080/songs/A73796AE-D7DE-4042-AD08-2194FBE4C0BA
// DELETE /users/:userID(这个:userID 是真实的 id)
// 删除(根据id删除)
songs.delete(":songID", use: delete)
// http://127.0.0.1:8080/songs/45F40F36-69E5-4C28-8462-D6271C9A054F
// 参数如下:
// {
// "title": "qiang jun zhan ge"
// }
// PUT /users/:userID(这个:userID 是真实的 id)
// 更新信息(根据id更新)
songs.put(":songID", use: update)
}
// GET Request /songs route
func index(req: Request) throws -> EventLoopFuture<[Song]> {
// 查询所有
return Song.query(on: req.db).all()
}
// POST Request /songs create 增
func create(req: Request) throws -> EventLoopFuture<HTTPStatus> {
let song = try req.content.decode(Song.self)
return song.save(on: req.db).transform(to: .ok)
}
func show(req: Request) throws -> EventLoopFuture<Song> {
return Song.find(req.parameters.get("songID"), on: req.db)
.unwrap(or: Abort(.notFound))
}
func update(req: Request) throws -> EventLoopFuture<Song> {
let updateSong = try req.content.decode(Song.self)
return Song.find(req.parameters.get("songID"), on: req.db)
.unwrap(or: Abort(.notFound)).flatMap { song in
song.title = updateSong.title
return song.save(on: req.db).map { song }
}
}
func delete(req: Request) throws -> EventLoopFuture<HTTPStatus> {
return Song.find(req.parameters.get("songID"), on: req.db)
.unwrap(or: Abort(.notFound)).flatMap { song in
song.delete(on: req.db).transform(to: .ok)
}
}
}
创建用户:POST /songs,带上 JSON 请求体,比如
bash
{
"title": "zhong guo ren"
}
列出所有用户:GET /songs
。
获取单个用户:GET /songs/:songID
。
更新用户信息:PUT /songs/:songID
。
删除用户:DELETE /songs/:songID
。
补充:
路径使用方法:
bash
// 响应到 GET /foo/bar/baz
app.get("foo", "bar", "baz") { req in
...
}
参数路径使用方法:
bash
app.get("hello", ":name") { req -> String in
let name = req.parameters.get("name")!
return "Hello, \(name)!"
}
我们尝试 /hello/swift
输出结果:
Hello, swift!
路由组
bash
app.group("users") { users in
// GET /users
users.get { req in
...
}
// POST /users
users.post { req in
...
}
// GET /users/:id
users.get(":id") { req in
let id = req.parameters.get("id")!
...
}
}