How can I stop EF 7 mapping an entity property to a column?

问题

In EF 6, I can add a NotMapped attribute to the property, then it will not be mapped to a column. How can I do this in EF 7?

回答1:

We haven't implemented data annotations yet. (See #107) You should be able to do it using the Fluent API.

modelBuilder.Entity<MyEntity>().Ignore(e => e.NotMappedProperty);

回答2:

Just to add on to Ricky and bricelam's answer,

There are two ways to ignore a property:

1. Data annotations on model

   public class Blog
   {
       public int BlogId { get; set; }
       public string Url { get; set; }
   
       [NotMapped]
       public DateTime LoadedFromDatabase { get; set; }
   }
   

2. Fluent API overriding OnModelCreating

   class MyContext : DbContext
    {
        public DbSet<Blog> Blogs { get; set; }
   
        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Blog>()
            .Ignore(b => b.LoadedFromDatabase);
        }
    }
   
    public class Blog
    {
        public int BlogId { get; set; }
        public string Url { get; set; }
   
        public DateTime LoadedFromDatabase { get; set; }
    }
   

Documentation available here.

来源：https://stackoverflow.com/questions/27540959/how-can-i-stop-ef-7-mapping-an-entity-property-to-a-column