1 00:00:05,210 --> 00:00:09,590 Welcome back, everyone, to this lecture, we're going to give you an overview of some of the jingo 2 00:00:09,590 --> 00:00:14,690 theory behind connecting a view and a URL before we actually start cutting it out in the next lecture. 3 00:00:16,110 --> 00:00:22,650 So as a refresher in jingo views essentially dictate what information is being shown to the client, 4 00:00:23,070 --> 00:00:27,360 you URLs dictate where that information is shown on the actual website. 5 00:00:27,750 --> 00:00:32,880 And these work in concert, so you can essentially think of each of you and you are appearing as a specific 6 00:00:32,880 --> 00:00:34,290 web page on the website. 7 00:00:34,680 --> 00:00:40,170 So very simply, you can just think of a view as a particular web page on your overall website. 8 00:00:40,500 --> 00:00:42,560 But keep in mind, the view can't do it alone. 9 00:00:42,570 --> 00:00:44,880 It needs to be routed through a URL. 10 00:00:47,080 --> 00:00:51,490 You should also keep in mind that not every permutation of a Web page can be known in advance. 11 00:00:51,700 --> 00:00:56,170 For example, how many total blog posts will a website blog eventually have? 12 00:00:56,200 --> 00:00:57,970 You couldn't really know that ahead of time. 13 00:00:58,390 --> 00:01:04,330 So luckily, jingo views and URLs actually support a lot of dynamic and logic features to help with 14 00:01:04,330 --> 00:01:05,349 this sort of task. 15 00:01:05,470 --> 00:01:11,110 For example, instead of having to hard code in an extension on your domain like blog, one block to 16 00:01:11,110 --> 00:01:12,580 block three and so on. 17 00:01:12,910 --> 00:01:15,670 You could have it be dynamic, so it should be blog RN. 18 00:01:15,900 --> 00:01:21,130 And then every time a new template gets added, then you're going to automatically be able to route 19 00:01:21,130 --> 00:01:23,380 that user to the correct blog post. 20 00:01:23,380 --> 00:01:28,150 And it can be dynamic in the sense that if a blog post hasn't been created yet, you send them to a 21 00:01:28,150 --> 00:01:29,220 404 page. 22 00:01:29,230 --> 00:01:30,820 So we'll be learning about that later on. 23 00:01:32,240 --> 00:01:39,560 Now, recall that we have essentially two main URLs that PY files and one is a URL configuration at 24 00:01:39,560 --> 00:01:42,610 a project level, and then the other one is going to be at the app level. 25 00:01:42,620 --> 00:01:46,940 And keep in mind, you can have multiple apps with multiple URLs that pays for each app. 26 00:01:47,450 --> 00:01:54,230 Well, we end up doing is we connect that view through the URL in the app level all the way to the URL 27 00:01:54,230 --> 00:02:00,080 and the project level through the use of path and include Django functions and a list of the view routes 28 00:02:00,080 --> 00:02:04,820 is defined in a list variable called URL patterns, which we've already seen a little bit of. 29 00:02:06,750 --> 00:02:12,600 So recall, previously we ended the last section by creating a view, connecting it to a URL route within 30 00:02:12,600 --> 00:02:17,310 the application and then connecting that URL to the project level URLs that file. 31 00:02:17,610 --> 00:02:22,050 And we're really going to focus on this particular dynamic for the rest of this section, and we'll 32 00:02:22,050 --> 00:02:23,730 get into more and more complex. 33 00:02:23,730 --> 00:02:29,550 These functionalities feature sets for what you can actually do with these URL routes and their particular 34 00:02:29,550 --> 00:02:30,030 views. 35 00:02:31,510 --> 00:02:36,970 Now, when we actually connect a view to our U you l, we do it with a path function call, and the 36 00:02:36,970 --> 00:02:40,600 first argument that's required any path function call is the actual route. 37 00:02:40,960 --> 00:02:43,660 That's going to be the string code that contains the URL pattern. 38 00:02:44,050 --> 00:02:50,230 And what ends up happening is Django actually scans the relevant URL patterns list until it finds a 39 00:02:50,230 --> 00:02:53,620 matching string route, for example, app forward slash. 40 00:02:53,770 --> 00:02:55,290 And keep in mind, later on, we'll see. 41 00:02:55,480 --> 00:03:01,180 We can actually make these sort of routes dynamic to take in an integer that we don't actually know 42 00:03:01,180 --> 00:03:01,770 ahead of time. 43 00:03:03,590 --> 00:03:09,230 Then we have the second required argument underneath the path function, which is the actual view. 44 00:03:09,680 --> 00:03:14,840 So once the matching route is found, the view argument connects to a function or view. 45 00:03:15,080 --> 00:03:18,320 Typically, the find the views that profile the relevant Django app. 46 00:03:18,710 --> 00:03:23,720 So these are the two main arguments you need to be concerned with whenever you're defining path inside 47 00:03:23,720 --> 00:03:30,950 some URLs that pie file, it's where is the actual route to show either a template or your URL on the 48 00:03:30,950 --> 00:03:31,520 website. 49 00:03:31,970 --> 00:03:33,890 And then what view should I be showing it? 50 00:03:33,920 --> 00:03:38,840 So where is the information going to be shown and then what is the information that's going to be shown? 51 00:03:40,230 --> 00:03:43,720 The other two optional arguments are keyword arguments. 52 00:03:43,740 --> 00:03:48,300 So we'll see that later on, we can actually pass in keyword arguments as a dictionary to the view and 53 00:03:48,300 --> 00:03:49,410 have a lot more flexibility. 54 00:03:49,770 --> 00:03:56,280 And then the fourth optional argument is name and actually allows us to name a URL in order to reference 55 00:03:56,280 --> 00:03:57,690 it elsewhere in Django. 56 00:03:58,080 --> 00:03:59,950 We're going to see when we start introducing templates. 57 00:03:59,970 --> 00:04:05,670 This is a very powerful feature that allows us to simply reference a view and URL route through the 58 00:04:05,670 --> 00:04:07,800 use of a custom defined name. 59 00:04:09,500 --> 00:04:13,490 So coming up next, we're to create some simple views in our app and connect them to our project, your 60 00:04:13,690 --> 00:04:14,180 roots. 61 00:04:14,570 --> 00:04:16,220 Let's go ahead and do that in the next lecture.