在.net核心项目中,我在Program.cs文件中进行播种,如下所示:
var host = BuildWebHost(args);
using (var scope = host.Services.CreateScope())
{
var services = scope.ServiceProvider;
try
{
var context = services.GetRequiredService<ApplicationDbContext>();
//.. do seeding
}
catch
{
}
}
host.Run();
服务堆栈中的服务是否在同一位置注册?我尝试了以下代码,但是var db = context.OpenDbConnection()
抛出未注册服务的异常:
没有注册类型为'ServiceStack.Data.IDbConnectionFactory'的服务。
这就是我所说的:
var host = BuildWebHost(args);
using (var scope = host.Services.CreateScope())
{
var services = scope.ServiceProvider;
try
{
var context = services.GetRequiredService<IDbConnectionFactory>();
using (var db = context.OpenDbConnection())
{
if(!db.Select<Register>(x => x.Email == "test@example").Any())
{
db.Insert(new Register
{
Email = "test@example.com",
Password = "1234"
});
}
}
//.. do seeding
}
catch
{
}
}
host.Run();
这是我在Startup.cs Configure()中注册它的方式
container.Register<IDbConnectionFactory>(c =>
new OrmLiteConnectionFactory(_sqliteFileDb, SqliteDialect.Provider));
container.Register<IAuthRepository>(c =>
new OrmLiteAuthRepository(c.Resolve<IDbConnectionFactory>()));
container.Resolve<IAuthRepository>().InitSchema();
我注册和检索数据库上下文的正确方法是什么?
答案 0 :(得分:2)
您要在.NET Core的IOC中查找依赖项,但要查找registered in ServiceStack's IOC is only visible to ServiceStack依赖项。
通常,在注册依赖项之后,您只需要播种数据,因为它们都仅在启动时注册和配置一次,例如:
container.Register<IDbConnectionFactory>(c =>
new OrmLiteConnectionFactory(_sqliteFileDb, SqliteDialect.Provider));
using (var db = container.Resolve<IDbConnectionFactory>().Open())
{
SeedData(db);
}
否则,您可以使用以下命令访问ServiceStack的IOC中的依赖项:
var dbFactory = HostContext.TryResolve<IDbConnectionFactory>();
using (var db = dbFactory.Open())
{
}