How to ignore a property when using Entity Framework Code First [duplicate]

Question

This question already has an answer here:

• Ignoring a class property in Entity Framework 4.1 Code First 2 answers

Entity Framework Code First will auto-create a table in the database base based on the Model.

Is there an attribute that will avoid this?

Answer 1

Add the [System.ComponentModel.DataAnnotations.Schema.NotMapped] attribute to the property.

Answer 2

Per the accepted answer and similar question/answer, in addition to [NotMapped] you can also specify it using the Fluent API:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
   modelBuilder.Entity<TheModelAffected>().Ignore(t => t.TheIgnoredProperty);
   base.OnModelCreating(modelBuilder);
}

Answer 3

[NotMapped] is the short version if you like conciseness. And of course, you would add:

using System.ComponentModel.DataAnnotations.Schema;

to your class.