我有代码优先实现的类,我试图让它创建表,以便Id字段设置为Identity = yes。不管我做什么,虽然似乎总是设置为否。
我尝试在Id属性上添加.HasKey和HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity),如下所示:
public class ApplicationDbContext : IdentityDbContext<User, Role, Guid, UserLogin, UserRole, UserClaim>
{
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.HasDefaultSchema("dbo");
modelBuilder.Entity<User>().Map(c =>
{
c.ToTable("User");
c.Property(p => p.Id).HasColumnName("UserId");
c.Properties(p => new
{
p.AccessFailedCount,
p.Email,
p.EmailConfirmed,
p.PasswordHash,
p.PhoneNumber,
p.PhoneNumberConfirmed,
p.TwoFactorEnabled,
p.SecurityStamp,
p.LockoutEnabled,
p.LockoutEndDateUtc,
p.UserName,
p.FirstName,
p.MiddleName,
p.LastName,
p.IsActive,
p.LastLogin,
p.CreatedBy,
p.CreatedOn,
p.LastModifiedBy,
p.LastModifiedOn
});
}).HasKey(c => c.Id);
modelBuilder.Entity<User>().HasMany(c => c.Logins).WithOptional().HasForeignKey(c => c.UserId);
modelBuilder.Entity<User>().HasMany(c => c.Claims).WithOptional().HasForeignKey(c => c.UserId);
modelBuilder.Entity<User>().HasMany(c => c.Roles).WithRequired().HasForeignKey(c => c.UserId);
modelBuilder.Entity<User>().Property(p => p.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
modelBuilder.Entity<User>().HasKey(p => p.Id);
我还将Class中Id属性的Attribute设置为Identity
public class User : IdentityUser<Guid, UserLogin, UserRole, UserClaim>, IEntity
{
public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<User, Guid> manager, string authenticationType)
{
// Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
var userIdentity = await manager.CreateIdentityAsync(this, authenticationType);
// Add custom user claims here
return userIdentity;
}
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public override Guid Id { get; set; }
[MaxLength(256)]
public string FirstName { get; set; }
[MaxLength(256)]
public string MiddleName { get; set; }
[MaxLength(256)]
public string LastName { get; set; }
public bool IsActive { get; set; }
public DateTime? LastLogin { get; set; }
public Guid? CreatedBy { get; set; }
public DateTime? CreatedOn { get; set; }
public Guid? LastModifiedBy { get; set; }
public DateTime? LastModifiedOn { get; set; }
}
}
实际迁移中的Up()方法如下:
CreateTable(
"dbo.User",
c => new
{
**UserId = c.Guid(nullable: false, identity: true),**
FirstName = c.String(maxLength: 256),
MiddleName = c.String(maxLength: 256),
LastName = c.String(maxLength: 256),
IsActive = c.Boolean(nullable: false),
LastLogin = c.DateTime(),
CreatedBy = c.Guid(),
CreatedOn = c.DateTime(),
LastModifiedBy = c.Guid(),
LastModifiedOn = c.DateTime(),
Email = c.String(),
EmailConfirmed = c.Boolean(nullable: false),
PasswordHash = c.String(),
SecurityStamp = c.String(),
PhoneNumber = c.String(),
PhoneNumberConfirmed = c.Boolean(nullable: false),
TwoFactorEnabled = c.Boolean(nullable: false),
LockoutEndDateUtc = c.DateTime(),
LockoutEnabled = c.Boolean(nullable: false),
AccessFailedCount = c.Int(nullable: false),
UserName = c.String(),
})
.PrimaryKey(t => t.UserId);
正如您所看到的,当脚本运行时,标识设置为否。
答案 0 :(得分:4)
IDENTITY仅适用于INT或BIGINT类型,不适用于GUID。见https://msdn.microsoft.com/en-us/library/ms186775.aspx。 相关:Uniqueidentifier vs. IDENTITY vs. Material Code --which is the best choice for primary key?。