EF核心映射EntityTypeConfiguration [英] EF Core Mapping EntityTypeConfiguration
本文介绍了EF核心映射EntityTypeConfiguration的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在EF6中,我们通常可以使用这种方式来配置实体。
In EF6 we usually able to use this way to configure the Entity.
public class AccountMap : EntityTypeConfiguration<Account>
{
public AccountMap()
{
ToTable("Account");
HasKey(a => a.Id);
Property(a => a.Username).HasMaxLength(50);
Property(a => a.Email).HasMaxLength(255);
Property(a => a.Name).HasMaxLength(255);
}
}
自从我继承了无法找到该类的EntityTypeConfiguration。
How we can do in EF Core, since when the class I Inherit EntityTypeConfiguration that unable to find the class.
我从GitHub下载了EF Core原始源代码,但找不到。
有人可以帮忙吗?
I download the EF Core raw source code from the GitHub, I can't find it. Can someone help on this?
推荐答案
自EF Core 2.0起,就有 IEntityTypeConfiguration< TEntity> ;
。您可以像这样使用它:
Since EF Core 2.0 there is IEntityTypeConfiguration<TEntity>
. You can use it like this:
class CustomerConfiguration : IEntityTypeConfiguration<Customer>
{
public void Configure(EntityTypeBuilder<Customer> builder)
{
builder.HasKey(c => c.AlternateKey);
builder.Property(c => c.Name).HasMaxLength(200);
}
}
...
// OnModelCreating
builder.ApplyConfiguration(new CustomerConfiguration());
有关此功能以及2.0中引入的其他新功能的更多信息,请参见此处。
More on this and other new features introduced in 2.0 can be found here.
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