Fluent API - one to many

Question

I cannot seem to find a one-to-many relationship syntax in the fluent API.

As an example I have two tables as below

User

Id
         


        

Answer 1

In your model a User entity has many Histories with each history having a required User and the relationship has a foreign key called UserId:

modelBuilder.Entity()
   .HasMany(u => u.Histories)
   .WithRequired()
   .HasForeignKey(h => h.UserId);

(The relationship must be required (not optional) because the foreign key property UserId is not nullable.)