Vapor swift开发数据库安装和heroku设置

注: heroku-18部署失败的解决方案:heroku-16 和 heroku-18的相互切换

1. 下载管理工具postgresapp 和 postico : 两个协同工作,都需要
2. 安装两个软件后进行设置
   1). 设置postgresapp
   
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   2).点击start按钮后如下图所示
   
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3)设置postico

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3. configure.swift文件的代码如下

import FluentSQLite
import Vapor
import FluentPostgreSQL

import Leaf

/// Called before your application initializes.
public func configure(_ config: inout Config, _ env: inout Environment, _ services: inout Services) throws {
    /// Register providers first
    try services.register(FluentPostgreSQLProvider())
    try services.register(LeafProvider())
    /// Register routes to the router
    let router = EngineRouter.default()
    try routes(router)
    services.register(router, as: Router.self)
    /// Register middleware
    var middlewares = MiddlewareConfig() // Create _empty_ middleware config
    middlewares.use(ErrorMiddleware.self) // Catches errors and converts to HTTP response
    services.register(middlewares)
    var databases = DatabasesConfig()
    var databaseConfig:PostgreSQLDatabaseConfig
    if let url = Environment.get("DATABASE_URL") {  // 这是部署到heroku的生产环境数据库地址(heroku配置图示本文会在下面给出图示)
        databaseConfig = PostgreSQLDatabaseConfig(url: url)!
    }
    else {  // 这是本地数据库配置
        databaseConfig = PostgreSQLDatabaseConfig(hostname: "localhost",
                                                  username: "liuhongli",
                                                  database: "postgres")
    }
    let database = PostgreSQLDatabase(config: databaseConfig)
    databases.add(database: database, as: .psql)
    services.register(databases)
    var migrations = MigrationConfig()
    migrations.setupModels()
    services.register(migrations)
    config.prefer(LeafRenderer.self, for: ViewRenderer.self)
}

如果需要密码可以这样写:

if let url = Environment.get("DATABASE_URL") {
        databaseConfig = PostgreSQLDatabaseConfig(url: url)!
    }
    else {
        databaseConfig = PostgreSQLDatabaseConfig(hostname: "localhost",
                                                  username: "liuhongli",
                                                  database: "postgres",
                                                  password: "123456")
    }

1. 下图是vapor项目中代码配置

   
   
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4. 下面是heroku的配置:

   
   
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