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Start your free trialLee Puckett
12,539 PointsIn Context.cs use the Fluent API in the OnModelCreating method to configure the CourseStudent.Grade property to have a p
I tried to copy his method for this challenge but I keep getting an error message. Not sure what I'm doing wrong.
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.Conventions.Remove<PluralizingTableNameConvention>();
modelBuilder.Conventions.Remove<DecimalPropertyConvention>();
modelBuilder.Conventions.Add (new DecimalPropertyConvention)(4, 3);
modelBuilder.Entity<CourseStudent.Grade>()
.Property(cb => cb.AverageRating)
.HasPrecision(4, 3);
}
}
}
4 Answers
Steven Parker
231,198 PointsHere's a few hints:
- for best results with challenges, do only what the challenge asks
- challenges will generaly not be exactly like a video example
- the challenge did not ask for any changes to Conventions
- be sure the type argument to Entity is an entity and not a property
- be sure to access the correct property via the "Property" method
Steven Parker
231,198 PointsCloser, but still a couple of issues remain:
- be sure the type argument to Entity is an entity and not a property
modelBuilder.Entity<CourseStudent.Grade>()
"CourseStudent" is the entity, "Grade" is the property
- be sure to access the correct property via the "Property" method
.Property(cb => cb.AverageRating)
the property needed here is not "AverageRating"
Lee Puckett
12,539 PointsOkay I took away the unnecessary code but still get the error "Did you call the model builder's 'Entity' method?"
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.Grade>()
.Property(cb => cb.AverageRating)
.HasPrecision(4, 3);
}
}
}
Tanmoy Chowdhury
12,622 PointsContext.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(c => c.Grade).HasPrecision(4,3);
}
}
}