WEBVTT 00:01.940 --> 00:02.510 Okay. 00:02.510 --> 00:06.290 Let's talk about URLs in this video. 00:07.310 --> 00:17.960 So inside our project, if we open our project here, we have URLs and that's main URLs that are responsible 00:17.960 --> 00:20.900 for our routing in our application. 00:20.900 --> 00:28.040 So if will open this, I can actually remove all that, but feel free to read this. 00:28.040 --> 00:30.440 That's very useful information here. 00:30.440 --> 00:35.840 What kind of different URLs we might use in our application, but I will remove it from here. 00:36.440 --> 00:44.690 So what's happening here is that we have at the moment one URL, one extra URL, because if we go to 00:44.690 --> 00:54.530 this base URL, I can see here that basic Django site is displayed and it means really nothing because 00:54.530 --> 00:56.870 it's just a placeholder for application. 00:56.870 --> 01:04.700 It's telling us that this is the Django has been successfully installed, but we need to do our own 01:04.700 --> 01:11.050 URLs and if we come back to our application here at the moment we have admin and we already visited 01:11.060 --> 01:12.080 admin here. 01:12.080 --> 01:21.710 So what we can do here and this is on the project level, we can do a reference to another URL file. 01:21.710 --> 01:27.590 So what I will do is I will go to the demo and I will create another URL file. 01:29.470 --> 01:31.540 So new file. 01:31.960 --> 01:35.950 Right click on the folder, new file and then I will do urls. 01:36.260 --> 01:40.540 PY and I have two files. 01:40.630 --> 01:41.230 URLs. 01:41.230 --> 01:51.280 Basically I will close others and I have one file that is for the project which is main file and another 01:51.280 --> 01:52.870 for our application. 01:52.870 --> 02:01.450 What I can do is basically I will copy what I have here and I will paste it for now here and in this 02:01.450 --> 02:03.180 part I can leave it blank. 02:03.190 --> 02:07.680 We don't have anything here for now, but I will add it later on. 02:07.690 --> 02:14.020 So what we can do is we might have some kind of folders in our URL. 02:14.020 --> 02:15.850 So if I will go to. 02:17.720 --> 02:22.390 At the end to slash demo and then slash something. 02:22.400 --> 02:26.690 I will use URL URLs from this application. 02:26.690 --> 02:33.830 So basically on the main project URLs, I will have that reference to demo and that will reference another 02:33.830 --> 02:39.650 file and I will go deeper and deeper and I might have a more than one level. 02:39.650 --> 02:41.480 It's all depend on us. 02:41.480 --> 02:46.490 So basically what we need to do is we need to add extra path here. 02:46.490 --> 02:54.860 I will just duplicate it here and I will do demo and wherever we go to demo we will need to do include. 02:56.710 --> 03:02.230 We need to also import that include from URLs. 03:02.230 --> 03:06.700 So include will give us an option to include some other urls. 03:06.700 --> 03:12.970 So urls is sorry, demo dot URLs. 03:13.300 --> 03:18.910 So basically what we are doing here, if we fill in our URL, we'll have a demo. 03:18.940 --> 03:24.010 We will include the URLs from this file which is inside the demo. 03:24.010 --> 03:26.680 So we might have another level here. 03:27.340 --> 03:31.210 So if I will save it now and then I will. 03:33.960 --> 03:35.460 Refresh it like this. 03:36.970 --> 03:38.450 And if going to be rich. 03:38.470 --> 03:46.990 Probably our server is not working at the moment because we need to include some extra information. 03:46.990 --> 03:51.130 So we need to go here and then we need to do something there. 03:51.130 --> 03:57.580 So basically what we will do, I will finish this exercise first and I will show you how it works later 03:57.580 --> 03:57.970 on. 03:57.970 --> 04:04.480 So what we will need to do is we'll need to have at least one reference so we'll have a path like this, 04:04.480 --> 04:10.690 which is kind of empty path, but that will be on the level demo is already we are in the demo and then 04:10.690 --> 04:15.400 we'll use our views and in views I can open views. 04:17.300 --> 04:19.280 We don't have anything here. 04:19.280 --> 04:22.400 So what we can do is we can create a simple function. 04:22.400 --> 04:27.500 So let's say first function here, and that's our definition first. 04:27.500 --> 04:32.210 And then so request will be part of this. 04:32.240 --> 04:33.620 We're not going to use it here. 04:33.620 --> 04:43.520 We will do return simple Http response and we need to import that. 04:43.550 --> 04:44.810 So from. 04:46.010 --> 04:47.810 Django http. 04:48.950 --> 04:52.760 Import that http response. 04:52.760 --> 04:59.240 And in this http response, what we can do is we can include some something. 04:59.240 --> 05:00.020 So. 05:00.860 --> 05:07.670 First search from views will include that. 05:07.670 --> 05:16.130 And that's a simple function we have in our Python on the views level so that first I can use it here. 05:16.340 --> 05:26.420 So what we need to do first we need to import so from current folder import views and that views are 05:26.420 --> 05:30.710 available here and inside here I can do views. 05:31.730 --> 05:33.170 And I can do. 05:33.210 --> 05:35.360 First I need to call it. 05:35.360 --> 05:39.340 So it is a reference to our view first. 05:39.350 --> 05:46.070 So now I will run the server and we don't have any issues. 05:46.070 --> 05:53.150 Now if we come back here and then I will refresh this changed. 05:53.180 --> 05:59.990 This changed because now we have our URLs in place, so there is no default page displayed with the 05:59.990 --> 06:00.390 Django. 06:00.410 --> 06:08.690 Now we have this demo and this admin, by the way, you see that screen because you have the back through 06:08.720 --> 06:09.830 in the settings file. 06:09.830 --> 06:17.570 So if you will put your application on the server, it will be better to go to the settings. 06:18.510 --> 06:21.350 And the back change it to false here. 06:21.360 --> 06:27.810 So for us to work on the on the testing environment on our machine, we can have it true because it's 06:27.810 --> 06:30.690 actually very, very handy to see that kind of thing. 06:30.690 --> 06:35.940 So basically the URL without anything here is not acceptable anymore. 06:35.940 --> 06:38.700 We need to put it demo or admin. 06:38.700 --> 06:41.820 And that's coming from our file, which is. 06:43.280 --> 06:44.800 This one URL. 06:44.810 --> 06:47.080 So we have demo and admin. 06:47.090 --> 06:51.770 If we go to admin, we'll go to admin as we did before. 06:51.770 --> 06:54.620 But if we go to demo, let's see what will happen. 06:54.830 --> 06:59.060 So let's go to the at the end of the our evil demo. 07:03.730 --> 07:06.550 And nothin is happening here. 07:06.550 --> 07:08.950 I think I need to put a blank. 07:11.850 --> 07:12.420 Bad. 07:12.450 --> 07:20.130 So let me refresh it again and let's come back here so you can see first message from views. 07:20.130 --> 07:21.540 So what is happening here? 07:21.540 --> 07:24.510 We have our URL and then we have slash demo. 07:24.510 --> 07:30.180 So we are coming from here, which is main URL for our project. 07:30.180 --> 07:37.980 Slash demo will send us two demo URLs and demo URLs, which is our application URLs. 07:38.070 --> 07:39.180 Has that. 07:39.180 --> 07:43.230 So empty path will use this view. 07:43.230 --> 07:49.470 And this view is a simple function that will return the string and that's the reason we see that string 07:49.470 --> 07:50.250 here. 07:50.340 --> 07:54.390 So if we would like to have this. 07:55.230 --> 07:59.040 Part something else, let's say first. 08:00.270 --> 08:02.910 Function like that. 08:04.570 --> 08:07.420 If I will copy that URL now. 08:08.360 --> 08:15.680 And if I would go to demo, this site is not available because demo and slash and not an else. 08:15.710 --> 08:17.510 It's not acceptable anymore. 08:17.540 --> 08:25.010 We have demo first function so I can go at the end and I can do first function here and you can see 08:25.040 --> 08:27.620 first message from the views is displayed. 08:27.620 --> 08:36.140 So it's really up to us how we will design our URLs and what will be URLs to use a specific parts of 08:36.140 --> 08:37.190 our application. 08:37.190 --> 08:39.440 We don't need to stick with one function. 08:39.530 --> 08:41.990 We don't need to stick with function at all. 08:41.990 --> 08:48.080 I will show you later on how we can actually use a more sophisticated way to display something on the 08:48.080 --> 08:48.410 screen. 08:48.410 --> 08:51.440 But this is very simple example how we can do it. 08:51.440 --> 08:57.650 So in our case it's just a simple function that return Http response and a simple text here. 08:58.610 --> 09:07.460 But in this URL you might have a lot of them and each of these will have a different URL so you can 09:07.460 --> 09:08.400 build a level. 09:08.420 --> 09:15.830 So you have main application and then demo will be first level like a folder and another folder will 09:15.830 --> 09:18.400 be here and you might have more than one here. 09:18.410 --> 09:23.090 So basically that's how URL works and we'll stick with that pattern. 09:23.090 --> 09:29.090 So basically the main URL will be whatever that is at the moment is localhost, but later on it will 09:29.090 --> 09:35.840 be your production server and then you have it here, then you have port slash and we go, we go here. 09:35.840 --> 09:40.520 If you go demo, you will go to the demo application and you will go URLs here. 09:40.520 --> 09:47.420 And then you have another level, which is another part which is will be slash, demo, slash whatever 09:47.420 --> 09:48.380 is in here. 09:48.380 --> 09:49.820 So we can do first. 09:51.690 --> 09:53.280 First for Shorter. 09:55.200 --> 09:57.360 And then we will display it here. 09:57.360 --> 09:59.940 So that's how URLs work. 09:59.940 --> 10:07.860 And later on I will show you also how we can include all the URLs that are available for our views, 10:07.860 --> 10:09.660 but class based view.