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C# Entity Framework Basics Extending Our Entity Data Model Using the Fluent API

Posted by Mohammad Hanbali
Mohammad Hanbali
13,325 Points

Not really understanding how to construct a solution to this question...

I understand what the method call will do and have implemented it within my own code following along with the videos but don't understand how to use it here - I'm feeling like I'm missing some of the necessary info.

Context.cs 
using System.Data.Entity;

namespace Treehouse.CodeChallenges
{
    public class Context : DbContext
    {
        public Context()
        {
            Database.SetInitializer(new DropCreateDatabaseAlways<Context>());
        }

        public DbSet<Course> Courses { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            ModelBuilder.Entity<CourseStudent>()
                .Property(cs => cs.Grade)
                .HasPrecision(4, 3);
        }
    }
}

2 Answers

Steven Parker
Steven Parker
229,670 Points
Steven Parker
Steven Parker
229,670 Points

The video has a good example of this.

At about 04:26 in the Overriding the Context's OnModelCreating Method video, there's a good example where the precision and scale were set on the ComicBook.AverageRating property. The class and property are different but the basic application will be the same.

Mohammad Hanbali
Mohammad Hanbali
13,325 Points
Mohammad Hanbali
Mohammad Hanbali
13,325 Points

I typed "ModelBuilder" instead of "modelBuilder", smh...

Steven Parker
Steven Parker
229,670 Points
Steven Parker
Steven Parker
229,670 Points

Right. Other than that, the changes you added to your code above look good. :+1:

Now about that name, either will work technically, but starting the name with a lower-case letter would follow the convention used throughout the course for parameter names.