可以通过重写DbContext.OnConfiguring来配置提供程序 [英] A provider can be configured by overriding the DbContext.OnConfiguring
问题描述
由于某种原因,自从我添加了Application User类后,它说我有两个上下文,但我没有这样做,但我按如下所述创建了该类:
For some reason since I added a Application User class ,it says I have two contexts which I do not but I created the class as follows as it said to do so:
public class ApplicationDbContextFactory : IDbContextFactory<solitudeDContext>
{
public solitudeDContext Create(DbContextFactoryOptions options)
{
var optionsBuilder = new DbContextOptionsBuilder<solitudeDContext>();
return new solitudeDContext(optionsBuilder.Options);
}
}
}
但是现在它说了以下话:
But now it is saying the following:
尚未为此DbContext配置数据库提供程序.一种可以通过重写DbContext.OnConfiguring来配置提供程序方法或通过在应用程序服务提供程序上使用AddDbContext.如果使用AddDbContext,则还要确保您的DbContext类型在其构造函数中接受一个DbContextOptions对象,然后将其传递给DbContext的基本构造函数.
No database provider has been configured for this DbContext. A provider can be configured by overriding the DbContext.OnConfiguring method or by using AddDbContext on the application service provider. If AddDbContext is used, then also ensure that your DbContext type accepts a DbContextOptions object in its constructor and passes it to the base constructor for DbContext.
这是我的数据库上下文层:
This is my db context layer:
public class solitudeDContext : IdentityDbContext<IdentityUser>
{ public solitudeDContext(DbContextOptions<solitudeDContext> options) : base(options)
{
}
public DbSet<basketheader> BasketHeader { get; set; }
public DbSet<basketlines> BasketLines { get; set; }
public DbSet<customer> Customer { get; set; }
protected override void OnModelCreating(ModelBuilder builder)
{
base.OnModelCreating(builder);
builder.Entity<ApplicationUser>(entity =>
{
entity.ToTable(name: "AspNetUser", schema: "Security");
entity.Property(e => e.Id).HasColumnName("AspNetUserId");
});
}
}
有人知道这是怎么回事吗?我正在使用ASP.NET CORE 1.1.在将我自己的Application用户用于Identy之前,这个编译还不错.因此,如果出现问题,我将其围在下面.
Anyone know what is up here? I am using ASP.NET CORE 1.1. Before I used my own Application user for Identy and this compiled fine. So I enclose it below in case something is wrong there.
public class ApplicationUser: IdentityUser
{
public string FirstName { get; set; }
public string LastName{ get; set; }
public DateTime dob { get; set; }
}
我的 startup.cs
:
// 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.AddMvc();
services.AddDbContext<IdentityDbContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"),b=>b.MigrationsAssembly("solitudeeccore")));
services.AddIdentity<IdentityUser, IdentityRole>()
.AddEntityFrameworkStores<IdentityDbContext>()
.AddDefaultTokenProviders();
services.AddTransient<IMessageService, FileMessageService>();
services.AddAuthentication();
}
// 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.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseIdentity();
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
});
}
我唯一的猜测是,由于我使用的是应用程序用户身份,因此用户正在使donet编译器考虑两个上下文?
My only guess is that now because I am using Application User Identity, user is making donet compiler thinking two contexts ?
推荐答案
我建议您通过添加 IDesignTimeDbContextFactory
实现来解决此问题.
I suggest you fixing this by adding IDesignTimeDbContextFactory
implementation.
// TODO: Remove.
// (part of the workaround for https://github.com/aspnet/EntityFramework/issues/5320)
public class TemporaryDbContextFactory : IDesignTimeDbContextFactory<ApplicationDbContext>
{
public ApplicationDbContext CreateDbContext(string[] args)
{
var configuration = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
.Build();
var builder = new DbContextOptionsBuilder<ApplicationDbContext>();
var connectionString = configuration.GetConnectionString("DefaultConnection");
builder.UseSqlServer(connectionString);
// Stop client query evaluation
builder.ConfigureWarnings(w =>
w.Throw(RelationalEventId.QueryClientEvaluationWarning));
return new ApplicationDbContext(builder.Options);
}
}
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