Building data-driven web apps with Pyramid and SQLAlchemy Transcripts
Chapter: User input and HTML forms
Lecture: Register for the site (getting started)
0:00 Well, it looks like we're making our way
0:01 through the various subjects over here.
0:03 Let's open up a new HTML form section.
0:07 This is Chapter 12 in the source.
0:10 Of course, I've already pre-configured this to load
0:13 in PyCharm and registered the site
0:15 by running to setup.py, things like that.
0:17 So let's just see where we are.
0:20 It's looking good. Our sites are really coming along.
0:22 Alright, quick on logging though.
0:24 Check out the URL. See, there's nothing here.
0:26 Click on this. Hash, hash. That's not amazing.
0:31 That means basically this is not implemented.
0:34 All right, over here in the AccountController
0:36 we have a little bit of information and I think I had left
0:39 more than I intended to in there before.
0:42 So we're going to start from this.
0:44 This allows us to show.
0:46 Well, it did not actually show or anything
0:48 because we can't get to it.
0:49 We could come over here and type just /account
0:52 and it says, "Hey, here's an account."
0:55 Not a whole lot of details.
0:57 Also notice we're not checking to see that we're logged in.
1:00 So it could say your account is such and such, right?
1:03 I mean, we'd really come up with no data
1:05 but still, well we don't want people to get to their account
1:08 if they're not logged in or have an account.
1:10 We also have over here our templates.
1:12 We have an account that has a truly bare login page
1:16 and sort of details, right, the login and register.
1:20 They all just look like this.
1:21 I guess it's with pointing out.
1:23 We also have already added some routes for this.
1:26 We do that before. We have /account/login
1:27 /account/register, /account/logout.
1:34 Place to start would be register
1:35 because we're going to need an account to login.
1:37 Let's create it by registry.
1:39 So we have index and index is really basic.
1:41 It's just basically a static HTML page
1:45 but let's go and create another section
1:48 and these dividers become more helpful
1:49 when we're working on these forms.
1:50 This would be register.
1:53 And this is really easy to forget.
1:54 Do not forget to change this.
1:56 If you change like information up here
2:01 but you don't change the name
2:02 it's just going to throw away that function
2:04 and redefine it to be, guess what, register.
2:07 All right, so let's go to register.
2:09 Now, like what I was just saying
2:10 we actually want to have get post redirect pattern.
2:14 So how does that look?
2:16 Well, we're going to come over here and say
2:19 the method equals GET and POST.
2:26 So this method is going to handle displaying the form.
2:28 In this case, maybe there's nothing
2:30 but maybe we pass over data
2:31 like here's all the countries you can pick from
2:34 or here's, I don't know, right
2:35 maybe filling out, drop down, and things like that.
2:38 In this one, we're going to actually process their request.
2:41 But the thing is set about the function names
2:43 also applies if we just leave it like this.
2:46 There only be one function at the end of this module
2:49 and when it's loaded
2:50 and that's the one that only handles POST.
2:52 So the GET would be 404.
2:53 So come over here and we can do a GET, and a POST.
2:58 Now let's just make sure everything
2:59 is hanging together here. Boom, register.
3:04 Register seems to be working. It's all wired up.
3:07 Okay, so this is the starting structure
3:10 of our get post redirect pattern.
3:12 We're going to have a form in here.
3:16 Put our form details in there
3:18 and then we're going to submit that form.
3:20 First, I'm going to show the form here
3:22 and we're going to submit and process it here.
3:24 In ideal situations we technically won't go back to this page.
3:28 They submit it, we process it. We move along somewhere else.
3:31 But if they get something wrong, if they've
3:33 if I don't fill out the email address
3:35 well have to have that. We can't register that.
3:37 So we're going to use the same template
3:39 to render same details plus an error.
3:43 If things got successful, when we want to
3:45 sometimes you can meet this render
3:46 but if you have any possible chance of an error, you can't.
3:50 Now one more thing, this drives me crazy.
3:52 Over here, notice we're not using request.
3:54 Similarly here, we put underscore
3:59 but this one we're going to need to use the request.
4:01 That's where we get the form data from
4:03 so we're just going to leave it like this.