无法将项目添加到数据库中

Question

//这是我从Paul Hudson在youtube上的教程中提出的问题的延续-

我已尝试将项目添加到数据库（请参见下图）-

当我应该单击上图的“添加”按钮时，这些框应为空（请参见下图）。尽管.Quantum Pizza不会被添加到.Statin Island Pizza和.Country Pizza的列表中，因为我没有做进一步的编码），但它应如下图所示-

但是结果如下-

现在，我要发布代码-----

configure.swift-

import  Fluent
import FluentSQLite
import Vapor
import Leaf // added

public func configure(_ config: inout Config, _ env: inout Environment, _ services: inout Services) throws {
    // Register routes to the router
    let router = EngineRouter.default()
    try routes(router)
    services.register(router, as: Router.self)

    let leafProvider = LeafProvider()    // added
    try services.register(leafProvider)  // added
    config.prefer(LeafRenderer.self, for: ViewRenderer.self)// added

    let directoryConfig = DirectoryConfig.detect()
    services.register(directoryConfig)
    try services.register(FluentSQLiteProvider())
    var databaseConfig = DatabasesConfig()
    let db = try SQLiteDatabase(storage: .file(path:"\(directoryConfig.workDir)pizza.db"))

    databaseConfig.add(database: db, as: .sqlite)
    services.register(databaseConfig)

    var migrationConfig = MigrationConfig()
    migrationConfig.add(model: Pizza.self, database: .sqlite)
    services.register(migrationConfig)
    let serverConfigure = NIOServerConfig.default(hostname: "0.0.0.0", port: 9090)
    services.register(serverConfigure)
}

routes.swift-

import Routing
import Vapor
import FluentSQLite

public func routes(_ router: Router) throws {
    router.get { req -> Future <View> in
        let Newyorker = Pizza(id: 5, name: "Statin Island Pizza", description: "Impractical Jokers Funny Pizza", price: 55)
        let Traditional = Pizza(id: 5, name: "Country Pizza ", description: "Johny Cash Special", price: 55)

        return try req.view().render("welcome",["pizza":[Newyorker,Traditional]])
    }

    router.post(Pizza.self, at: "add") { req, pizza -> Future<Response> in
        return pizza.save(on:req).map(to:Response.self) { Pizza in
            return req.redirect(to: "/")
        }
    }
}

pizza.swift-

import Foundation
import Vapor
import FluentSQLite

struct Pizza: Encodable, Content, Decodable, SQLiteModel, Migration {
    var id:  Int?
    var name: String
    var description: String
    var price: Int
}

叶子屏幕截图（我尝试以正确的格式粘贴代码，但无法，因此无法添加。因此添加screeshot）-

编辑1：点击添加按钮后的屏幕截图-

如有需要，我们很乐意为您提供更多信息。另外，我想知道我的问题的标题是否应该修改或添加任何内容。谢谢。

Answer 1

您的表单操作应为action="add"（您缺少用于结束操作的引号）