Remove()
{
DatabaseCourseRepository r;
Setup();
string name = Guid.NewGuid().ToString("N");
using (var db = new DemoDbContext())
{
r = new DatabaseCourseRepository(db);
var course = new Course(name);
r.Add(course);
r.Remove(course);
Assert(!r.All.Any(c => c.Name == name));
db.SaveChanges();
}
using (var db = new DemoDbContext())
{
r = new DatabaseCourseRepository(db);
var course = new Course(name);
r.Add(course);
db.SaveChanges();
}
using (var db = new DemoDbContext())
{
r = new DatabaseCourseRepository(db);
var course = r.All.Single(c => c.Name == name);
r.Remove(course);
db.SaveChanges();
}
using (var db = new DemoDbContext())
{
r = new DatabaseCourseRepository(db);
Assert(!r.All.Any(c => c.Name == name));
}
}
public ActionResult Course(Course course)
{
string courseName = (RouteData.Values["courseName"] ?? "").ToString().Trim();
string action = (Request.Form["action"] ?? "").Trim().ToLowerInvariant();
bool deleting = (action == "delete" && courseName != "");
bool creating = (!deleting && courseName == "");
bool updating = (!deleting && !creating);
bool cancelling = (action == "cancel");
ViewBag.CourseName = courseName;
ViewBag.Creating = creating;
ViewBag.Updating = updating;
if (cancelling)
{
if (creating)
{
return(RedirectToRoute("Courses"));
}
else
{
return(RedirectToRoute("Course", new { courseName = courseName }));
}
}
if (!ModelState.IsValid)
{
return(View(course));
}
using (var db = new DemoDbContext())
{
ICourseRepository courses = new DatabaseCourseRepository(db);
Course existing =
!creating
? courses.All.Single(c => c.Name == courseName)
: null;
if (deleting)
{
courses.Remove(existing);
db.SaveChanges();
return(RedirectToRoute("Courses"));
}
try
{
if (creating)
{
courses.Add(course);
}
else
{
course.CopyShallowTo(existing);
}
}
catch (InvalidOperationException ioe)
{
ModelState.AddModelError("", ioe.Message);
}
catch (ArgumentException ae)
{
ModelState.AddModelError("", ae.Message);
}
if (!ModelState.IsValid)
{
return(View(course));
}
db.SaveChanges();
return(RedirectToRoute("Course", new { courseName = course.Name }));
}
}