我正在asp.net核心项目使用EF核心。我通过覆盖上下文类中的OnModelCreating函数来映射我的实体。我可以轻松地手动映射这些实体。好了,我会更好地后我的代码,并解释..注册实体映射
这是我在我的上下文类所做的:
protected override void OnModelCreating(ModelBuilder builder)
{
base.OnModelCreating(builder);
//builder.RegisterEntityMapping<CodeTable, CodeTableMap>();
builder.RegisterEntityMapping<Country, CountryMap>();
builder.RegisterEntityMapping<State, StateMap>();
builder.RegisterEntityMapping<City, CityMap>();
builder.RegisterEntityMapping<User, UserMap>();
builder.RegisterEntityMapping<Prospect, ProspectMap>();
}
Country.cs
public class Country:BaseEntity
{
public string CountryCode { get; set; }
public string CountryName { get; set; }
public string Currency { get; set; }
public string CurrencyName { get; set; }
public string UnitOfMeasure { get; set; }
public string TelephoneCountryCode { get; set; }
public string CurrencySymbol { get; set; }
public virtual ICollection<State> States { get; set; }
public virtual ICollection<City> Cities { get; set; }
}
CountryMap.cs
public class CountryMap : QuantumEntityTypeConfiguration<Core.Domain.Country>
{
public override void Map(EntityTypeBuilder<Core.Domain.Country> builder)
{
builder.ToTable("Country");
builder.HasKey(pr => pr.CountryCode);
builder.HasMany(m => m.Cities).WithOne(i=> i.Country).HasForeignKey(m=> m.CountryCode);
builder.HasMany(m => m.States).WithOne(i => i.Country).HasForeignKey(m => m.CountryCode);
}
}
但是,我想动态地做这件事,因为之后会映射所有模型。我能找到nopCommerce的上下文类的解决方案,他们这样做的:
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
//dynamically load all configuration
//System.Type configType = typeof(LanguageMap); //any of your configuration classes here
//var typesToRegister = Assembly.GetAssembly(configType).GetTypes()
var typesToRegister = Assembly.GetExecutingAssembly().GetTypes()
.Where(type => !String.IsNullOrEmpty(type.Namespace))
.Where(type => type.BaseType != null && type.BaseType.IsGenericType &&
type.BaseType.GetGenericTypeDefinition() == typeof(NopEntityTypeConfiguration<>));
foreach (var type in typesToRegister)
{
dynamic configurationInstance = Activator.CreateInstance(type);
modelBuilder.Configurations.Add(configurationInstance);
}
//...or do it manually below. For example,
//modelBuilder.Configurations.Add(new LanguageMap());
base.OnModelCreating(modelBuilder);
}
我试图实现这一点,我得到了一个错误:
protected override void OnModelCreating(ModelBuilder builder)
{
// TODO: Use Dynamic mapping by getting classes which uses QuantumEntityTypeConfiguration
var typesToRegister = Assembly.GetExecutingAssembly().GetTypes()
.Where(type => !String.IsNullOrEmpty(type.Namespace))
.Where(type => type.BaseType != null && type.BaseType.IsGenericType &&
type.BaseType.GetGenericTypeDefinition() == typeof(QuantumEntityTypeConfiguration<>));
foreach (var type in typesToRegister)
{
dynamic configurationInstance = Activator.CreateInstance(type);
builder.Configurations.Add(configurationInstance); //Error in this line specifying:ModelBuilder has no defination for Configuration.
}}
那么nopCommerce使用命名空间中的DbModelBuilder:System.Data.Entity和我使用模型构建器名称空间下:Microsoft.EntityFrameworkCore。
因此,如果您有任何解决方案或建议。请告诉我。
有用github上的问题:HTTPS ://github.com/aspnet/EntityFramework/issues/2805请参阅最后一项和https://github.com/Grinderofl/FluentModelBuilder –