public async Task<ActionResult> Edit(Tag tag, IUpdateServiceAsync service)
{
if (!ModelState.IsValid)
//model errors so return immediately
return View(tag);
var response = await service.UpdateAsync(tag);
if (response.IsValid)
{
TempData["message"] = response.SuccessMessage;
return RedirectToAction("Index");
}
//else errors, so copy the errors over to the ModelState and return to view
response.CopyErrorsToModelState(ModelState, tag);
return View(tag);
}
public void Check01ValidateTagOk()
{
using (var db = new SampleWebAppDb())
{
//SETUP
var snap = new DbSnapShot(db);
//ATTEMPT
var dupTag = new Tag { Name = "non-duplicate slug", Slug = Guid.NewGuid().ToString("N") };
db.Tags.Add(dupTag);
var status = db.SaveChangesWithChecking();
//VERIFY
status.IsValid.ShouldEqual(true, status.Errors);
snap.CheckSnapShot(db, 0,0,0,1);
}
}
public void Check02ValidateTagError()
{
using (var db = new SampleWebAppDb())
{
//SETUP
var existingTag = db.Tags.First();
//ATTEMPT
var dupTag = new Tag {Name = "duplicate slug", Slug = existingTag.Slug};
db.Tags.Add(dupTag);
var status = db.SaveChangesWithChecking();;
//VERIFY
status.IsValid.ShouldEqual(false);
status.Errors.Count.ShouldEqual(1);
status.Errors[0].ErrorMessage.ShouldEqual("The Slug on tag 'duplicate slug' must be unique and is already being used.");
}
}