Question

我正在使用asp.net 5和EF 7 VS2015开始一个新项目。

我选择了用户管理的项目模板。现在我想在dbContext中添加一些类，并使用我的新类创建一个新的模式。

这是我的ApplicationDbContext看起来像：

    public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public DbSet<Candidate> Candidates { get; set; }
    public DbSet<Manager> Managers { get; set; }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
        // Customize the ASP.NET Identity model and override the defaults if needed.
        // For example, you can rename the ASP.NET Identity table names and more.
        // Add your customizations after calling base.OnModelCreating(builder);
        builder.Entity<Candidate>().Key(x => x.Id);
        builder.Entity<Manager>().Key(x => x.Id);
    }
}

我无法将我的数据库重新创建或迁移到包含Candidates和Managers表格的版本。

我必须输入哪些命令才能显示数据库？我的朋友谷歌和必应向我指出了各个方向，但我找不到任何有用的东西。

Answer 1

您需要使用新的import UIKit import Parse import AVFoundation class ListaTableViewController: UITableViewController { var queryArray: [PFObject] = [PFObject]() override func viewDidLoad() { super.viewDidLoad() var query = PFQuery(className:"Restaurantes") query.findObjectsInBackgroundWithBlock { (objects: [AnyObject]?, error: NSError?) -> Void in if error == nil { println("Successfully retrieved \(objects!.count) Restaurantes.") if let _objects = objects as? [PFObject] { self.queryArray = _objects self.tableView.reloadData() } } else { println("Error: \(error!) \(error!.userInfo!)") } } } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } // MARK: - Table view data source override func numberOfSectionsInTableView(tableView: UITableView) -> Int { // #warning Potentially incomplete method implementation. // Return the number of sections. return 1 } override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { // #warning Incomplete method implementation. // Return the number of rows in the section. return queryArray.count } override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> ListaTableViewCell { let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! ListaTableViewCell //Insert text in tableview let restaurante = queryArray[indexPath.row] as! PFObject cell.textCell.text = restaurante.objectForKey("nome") as! String //Insert images in tableview if let userPicture = restaurante.objectForKey("imagem1") as? PFFile { userPicture.getDataInBackgroundWithBlock { (imageData: NSData?, error: NSError?) -> Void in if (error == nil) { cell.imageBg.image = UIImage(data:imageData!) } } } return cell } override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { if segue.identifier == "cell" { if let destination = segue.destinationViewController as? MenuPageViewController { if let blogIndex = tableView.indexPathForSelectedRow()?.row { } } } } }命令，例如：

dnx

并运行迁移：

dnx . ef migration add NameOfMigration

Answer 2

根据ASP.NET 5和Entity 7 RC1，步骤如下：

在主项目中向Entity Commands nuget包添加依赖项。所以在project.json你应该看到这种依赖 "EntityFramework.Commands": "7.0.0-rc1-final"
稍后添加一个别名命令以便在控制台中使用。因此，在project.json中，您将拥有以下ef命令： "commands": { "ef": "EntityFramework.Commands", "web": "Microsoft.AspNet.Server.Kestrel" }
打开控制台并运行迁移命令。例如：

D:\Projects\MyProject\src\MyProject.Web.Api>dnx ef migrations add Initial --targetProject MyProject.Data.SqlServer
然后查看ef将在项目中创建的迁移，并使用以下命令将更改应用于数据库（为项目配置的数据库）：

D:\Projects\MyProject\src\MyProject.Web.Api>dnx ef database update

请注意，属性--targetProject允许您指定DbContext所在的项目以及将创建文件夹迁移的位置。如果您的DbContext在您的主项目中，您可以省略（但我建议有一个类库项目，因为这个命令很方便）

在Startup.cs中，您通常会获得Entity的配置，包括连接字符串。这是一个基本的例子：

public Startup(IHostingEnvironment env)
    {
        // Set up configuration sources.
        var builder = new ConfigurationBuilder()
            .AddJsonFile("appsettings.json")
            .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
            .AddEnvironmentVariables();
        Configuration = builder.Build();
        builder.AddEnvironmentVariables();
        Configuration = builder.Build();
    }

    public IConfigurationRoot Configuration { get; private set; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        // Add framework services.
        services.AddEntityFramework()
            .AddSqlServer()
            .AddDbContext<KuneDbContext>(options => {
                options.UseSqlServer(Configuration["Data:DefaultConnection:ConnectionString"]);
            });

        // Add identity here http://docs.asp.net/en/latest/tutorials/your-first-aspnet-application.html

        services.AddMvc();

        // Add application services
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        loggerFactory.AddConsole(Configuration.GetSection("Logging"));
        loggerFactory.AddDebug();

        if (env.IsDevelopment())
        {
            app.UseBrowserLink();
            app.UseDeveloperExceptionPage();
            app.UseDatabaseErrorPage();
        }
        else
        {
            app.UseExceptionHandler("/Home/Error");

            // For more details on creating database during deployment see http://go.microsoft.com/fwlink/?LinkID=615859
            try
            {
                using (var serviceScope = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>()
                    .CreateScope())
                {
                    serviceScope.ServiceProvider.GetService<KuneDbContext>()
                         .Database.Migrate();
                }
            }
            catch { }
        }

        app.UseIISPlatformHandler();

        app.UseStaticFiles();
        app.UseMvc(routes =>
        {
            routes.MapRoute(
                name: "default",
                template: "{controller=Home}/{action=Index}/{id?}");
        });

        //Seed Data if you want to load some test data in the DB
        //SeedData.Initialize(app.ApplicationServices);
    }

    // Entry point for the application.
    public static void Main(string[] args) => WebApplication.Run<Startup>(args);
}

如何将迁移添加到EntityFramework 7项目

2 个答案: