更改EF6密钥FK约定

Question

默认情况下，EF将我的FKs命名为EntityName_id，我希望它被命名为id_EntityName。我怎么能这么做？

Edit1:

这里有700多个FKs ..。自动化这会更快我相信..。还打算用同样的答案来规范复合PKs.

Answer 1

MSDN有一个创建自定义ForeignKeyNamingConvention的示例。。您可以根据约定修改此示例以命名Foreign。

我还没有测试过这一点，但是这里有一些您可能可以构建的粗略代码：

public class ForeignKeyNamingConvention : IStoreModelConvention<AssociationType>
{
    public void Apply(AssociationType association, DbModel model)
    {
        if (association.IsForeignKey)
        {
            var constraint = association.Constraint;

            for (int i = 0; i < constraint.ToProperties.Count; ++i)
            {
                int underscoreIndex = constraint.ToProperties[i].Name.IndexOf('_');
                if (underscoreIndex > 0)
                {
                    // change from EntityName_Id to id_EntityName
                    constraint.ToProperties[i].Name = "id_" + constraint.ToProperties[i].Name.Remove(underscoreIndex);
                } 
            }
        }
    }
}

然后，您可以在DbContext's OnModelCreating()方法中注册您的自定义约定，如下所示：

protected override void OnModelCreating(DbModelBuilder modelBuilder)  
{  
    modelBuilder.Conventions.Add<ForeignKeyNamingConvention>();  
} 

Answer 2

我认为最好的方法是使用fluent映射，例如

.Map(m => m.MapKey("id_EntityName")

Answer 3

您可以通过为实体设置映射来做到这一点。

public class User
{
     public int Id {get;set;}
     public virtual Address Address {get;set;}


}

public class Address
{
     public int Id {get;set;}
     //Some other properties
}




public class UserMapping: EntityTypeConfiguration<User>
{
    public UserMapping()
    {
         HasOptional(u => u.Address).WithMany()
                                   .Map(m => m.MapKey("Id_Address"));

    }
}

//Override the OnModelCreating method in the DbContext
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
      modelBuild.Configurations.Add(new UserMapping());
}