如何在.net6中使用默认值初始化数据库

Question

Till.net5我一直在startup.cs文件中使用以下方法播种数据：

SeedData.Seed(_userManager, _roleManager);

然后在一个单独的文件SeedData.cs中，以下代码：

public static class SeedData
{
public static void Seed(UserManager<IdentityUser> userManager, RoleManager<IdentityRole> roleManager)
{
SeedRoles(roleManager);
SeedUsers(userManager);
}
private static void SeedUsers(UserManager<IdentityUser> userManager)
{
if(userManager.FindByNameAsync("[e-mail]").Result == null)
{
var user = new IdentityUser
{
UserName = "[e-mail]",
Email = "[e-mail]"
};
var result = userManager.CreateAsync(user, "P@ssword1").Result;
if(result.Succeeded)
{
userManager.AddToRoleAsync(user, "Administrator").Wait();
}
}
}
private static void SeedRoles(RoleManager<IdentityRole> roleManager)
{
if(!roleManager.RoleExistsAsync("Administrator").Result)
{
var role = new IdentityRole
{
Name = "Administrator",
};
var result = roleManager.CreateAsync(role).Result;
}
if(!roleManager.RoleExistsAsync("Employee").Result)
{
var role = new IdentityRole
{
Name = "Employee",
};
var result = roleManager.CreateAsync(role).Result;
}
}
}

既然.net6只有program.cs文件，我该如何对它执行同样的操作？

Answer 1

这是我个人所做的：

我对IApplicationBuilder:进行了扩展

public static class ApplicationBuilderExtensions
{
public static async Task<IApplicationBuilder> PrepareDatabase(this IApplicationBuilder app)
{
using var scopedServices = app.ApplicationServices.CreateScope();
var serviceProvider = scopedServices.ServiceProvider;
var data = serviceProvider.GetRequiredService<NeonatologyDbContext>();
data.Database.Migrate();
await SeedAdministratorAsync(serviceProvider);
await SeedDoctorAsync(data, serviceProvider);

return app;
}

以下是种子：

private static async Task SeedDoctorAsync(NeonatologyDbContext data, IServiceProvider serviceProvider)
{
if (data.Doctors.Any())
{
return;
}
var userManager = serviceProvider.GetRequiredService<UserManager<ApplicationUser>>();
var roleManager = serviceProvider.GetRequiredService<RoleManager<ApplicationRole>>();
var identityRole = new ApplicationRole()
{
Name = DoctorRoleName
};
await roleManager.CreateAsync(identityRole);
var city = await data.Cities.Where(x => x.Name == "Плевен").FirstOrDefaultAsync();
var doctor = new ApplicationUser()
{
Email = DoctorEmail,
UserName = DoctorEmail,
EmailConfirmed = true,
Doctor = new Doctor
{
FirstName = DoctorFirstName,
LastName = DoctorLastName,
PhoneNumber = DoctorPhone,
Address = Address,
Age = DoctorAge,
Biography = Biography,
CityId = city.Id,
City = city,
YearsOfExperience = YearsOfExperience,
Email = DoctorEmail
}
};
await userManager.CreateAsync(doctor, DoctorPassword);
await userManager.AddToRoleAsync(doctor, identityRole.Name);
doctor.Doctor.UserId = doctor.Id;
doctor.Doctor.Image = new Image()
{
RemoteImageUrl = "SomeURL"
};
await data.SaveChangesAsync();
}
private static async Task SeedAdministratorAsync(IServiceProvider serviceProvider)
{
var userManager = serviceProvider.GetRequiredService<UserManager<ApplicationUser>>();
var roleManager = serviceProvider.GetRequiredService<RoleManager<ApplicationRole>>();
if (await roleManager.RoleExistsAsync(AdministratorRoleName))
{
return;
}
var identityRole = new ApplicationRole()
{
Name = AdministratorRoleName
};
await roleManager.CreateAsync(identityRole);
const string adminEmail = AdministratorEmail;
const string adminPassword = AdministratorPassword;
var adminUser = new ApplicationUser()
{
Email = adminEmail,
UserName = adminEmail,
EmailConfirmed = true
};
if (await userManager.IsInRoleAsync(adminUser, identityRole.Name))
{
return;
}
await userManager.CreateAsync(adminUser, adminPassword);
await userManager.AddToRoleAsync(adminUser, identityRole.Name);
}

在程序.cs中，我有：

app.PrepareDatabase()
.GetAwaiter()
.GetResult();

下面的片段对我有用，并在应用程序初始化时为数据种子。