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As the first step in setting up our “Delete Entry” page, we’re ready to update our controller to handle deletes.
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We're almost done.
0:00
Let's see how to delete entries.
0:02
Here's our entries list page.
0:04
When we click on an entry's delete button,
we're making a Git request for
0:06
our delete page.
0:10
As you can see,
there's not much here right now.
0:11
We'll finish this page in this video.
0:14
Let's take a look at our
controller's delete action method.
0:16
We can see here that it's currently
ensuring that we have an ID
0:26
parameter value and
then returning the view.
0:30
Should we update this action method
to delete the specified entry?
0:33
No it's not a good idea for
a Git request to change data.
0:37
Performing a Git request should
always be a safe action to make.
0:40
Instead, our delete action method will
return a view that will allow the user
0:45
to review the entry and confirm that
they want to delete it clicking on that
0:50
views delete button will make a post
request to the server to delete the entry.
0:54
Go ahead and stop the app like
we did in an earlier video.
0:59
Let's think through the changes that
we need to make to our controller and
1:03
add to do comments.
1:06
First we need to retrieve the entry for
the provided ID parameter value.
1:08
To do, retrieved entry for
1:14
the provided ID parameter value.
1:18
And return not found if
an entry wasn't found.
1:24
Return not found if an entry wasn't found,
1:28
then pass the entry to the view.
1:35
Pass the entry to the view.
1:45
We also need a delete post action
method so lets stub that method out.
1:48
First, this method should
only accept post request.
1:54
So start with the [HttpPost] attribute.
1:57
Then the signature for
our method, public ActionResult
2:01
Delete(int id).
2:07
Notice that we're just accepting
an integer parameter value
2:13
instead of an entry model instance.
2:16
To delete an entry we just need the ID,
not the whole model.
2:19
Inside of the action method,
we need to do two things.
2:23
One, delete the entry.
2:27
TODO Delete the entry.
2:30
And two, redirect the user
to the entries list page.
2:33
TODO Redirect to the "Entries" list page.
2:38
Now let's implement our to dos.
2:46
Starting with our delete get action
method, we need to retrieve the entry for
2:50
the provided ID parameter value.
2:54
We've seen that code before.
2:57
Entry, entry, equals entries
2:58
repository, get entry int id.
3:05
And then we need to return not
found if an entry wasn't found.
3:11
We've seen that code before too.
3:15
If entry equals equals null
3:19
return HTTP not
3:22
found and lastly we need to
pass the entry to the view.
3:28
That's easy to do too just pass the entry
variable to our view method call.
3:34
Hey, we're on a roll.
3:42
Now for our delete post action method.
3:44
To delete the entry, we just need to
call the repositories delete method.
3:51
EntriesRepository.DeleteEntry.
3:55
Then we need to redirect
the user to the entries list page
4:04
by returning a call to
the RedirectToAction method.
4:08
And that completes
4:11
the changes to our
4:16
controller.
4:21
Nice job, let's make sure that our
project can successfully build
4:26
by pressing Ctrl+Shift+B.
4:29
And here in the output window, we can see
that our project was successfully built.
4:32
If you're using GitHub,
let's commit our changes.
4:37
Enter a commit message of
updated the controller
4:44
to support the delete page and
click the commit all button.
4:49
Now we need to work on the view
which we'll do after the break.
4:58
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