Updating Our Controller to Handle Deletes

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