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Start your free trialJon Andreas Grenness
5,055 PointsError when trying to create a 'stub' course
I'm trying to solve this challenge, but get an error stating:
"Repository.cs(64,43): error CS1922: A field or property Treehouse.CodeChallenges.Course' cannot be initialized with a collection object initializer because type
Treehouse.CodeChallenges.Course' does not implement `System.Collections.IEnumerable' interface
"
I've rewatched the video multiple times, but I can't see what I'm doing wrong. Anyone see what's wrong with my code?
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
namespace Treehouse.CodeChallenges
{
public static class Repository
{
public static List<Course> GetCourses()
{
using (var context = new Context())
{
return context.Courses
.OrderBy(c => c.Teacher.LastName)
.ThenBy(c => c.Teacher.FirstName)
.ToList();
}
}
public static List<Course> GetCoursesByTeacher(string lastName)
{
using (var context = new Context())
{
return context.Courses
.Where(c => c.Teacher.LastName == lastName)
.ToList();
}
}
public static Course GetCourse(int id)
{
using (var context = new Context())
{
return context.Courses
.Include(c => c.Teacher)
.SingleOrDefault(c => c.Id == id);
}
}
public static void AddCourse(Course course)
{
using (var context = new Context())
{
context.Courses.Add(course);
context.SaveChanges();
}
}
public static void UpdateCourse(Course course)
{
using (var context = new Context())
{
context.Courses.Attach(course);
context.Entry(course).State = EntityState.Modified;
context.SaveChanges();
}
}
public static void DeleteCourse(int id)
{
using (var context = new Context())
{
// Create a "stub" course entity and set its Id property value to the passed in id parameter value
var course = new Course() { Id == id };
// Retrieve the course's entry using the context's Entry method and set its state to "Deleted"
context.Entry(course).State = EntityState.Deleted;
// Call the context's SaveChanges method to persist the changes to the database
context.SaveChanges();
}
}
}
}
2 Answers
Steven Parker
231,198 PointsWhere the Id property is being set, the code shows "Id == id
".
But ==
is a comparison operator. What you want here is the assignment operator (just one =
).
Jon Andreas Grenness
5,055 PointsThat was it!