在OnModelCreating for EF core中創建一個用戶和角色

Question

在OnModelCreating for EF core中創建一個用戶和角色

asp.net-core asp.net-core-2.0 entity-framework-core

題

我正在開發一個asp.net-core 2.0項目。

該項目包含一個包含Entity Framework Core的數據庫。我正在使用遷移的Code First模式。

我想要做的是在我的數據庫中創建一些結構創建的默認數據。

我需要創建一個用戶。

我在IdentityDbContext類中查看了OnModelCreating函數，但我無法訪問userManager對象。

所以我不知道該怎麼辦....謝謝

這是我的代碼：

    public class MyContext : IdentityDbContext<Utilisateurs>
    {
        public static string ConnectionString;

        public MyContext()
        {

        }

        public MyContext(DbContextOptions<pluginwebContext> options) : base(options)
        {

        }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseSqlServer(MyContext.ConnectionString);
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            var user = new MyUserClass { UserName = "test" };

            // Error There
            var result = await _userManager.CreateAsync(user, "1234");
        }

        public DbSet<MyTable1> table1 { get; set; }
        ...
    }

Bob5421

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Trinity · Accepted Answer · 11/30/2017 9:10:26 AM

在DbInitialize類中初始化數據的約定不在modelCreating方法中。使用modelCreating最常用的方法是將實體映射到數據庫表，如下面的代碼。

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
     modelBuilder.Entity<Course>().ToTable("Course");
     modelBuilder.Entity<Enrollment>().ToTable("Enrollment");
     modelBuilder.Entity<Student>().ToTable("Student");
}

稍後，您可以為虛擬對象創建一個類。

  public static class DbInitializer
    {
        public static void Initialize(SchoolContext context)
        {
            //context.Database.EnsureCreated();

            // Look for any students.
            if (context.Students.Any())
                {
                    return;   // DB has been seeded
                }

        var courses = new Course[]
                    {
                        new Course {CourseID = 1050, Title = "Chemistry",      Credits = 3,
                            DepartmentID = departments.Single( s => s.Name == "Engineering").DepartmentID
                        },
                        new Course {CourseID = 4022, Title = "Microeconomics", Credits = 3,
                            DepartmentID = departments.Single( s => s.Name == "Economics").DepartmentID
                        },
                        new Course {CourseID = 4041, Title = "Macroeconomics", Credits = 3,
                            DepartmentID = departments.Single( s => s.Name == "Economics").DepartmentID
                        },
                        new Course {CourseID = 1045, Title = "Calculus",       Credits = 4,
                            DepartmentID = departments.Single( s => s.Name == "Mathematics").DepartmentID
                        },
                        new Course {CourseID = 2042, Title = "Literature",     Credits = 4,
                            DepartmentID = departments.Single( s => s.Name == "English").DepartmentID
                        },
                    };

                    foreach (Course c in courses)
                    {
                        context.Courses.Add(c);
                    }
                    context.SaveChanges();

在OnModelCreating for EF core中創建一個用戶和角色

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