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Welcome back, everyone, and the previous lecture, we used a create view to create a new instance

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of our model in this particular case, a teacher.

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Now I did tell you you could go through the admin panel to confirm that actually worked, but we could

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also do is create a list for you, which is going to list all the instances for a particular model.

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Let's check it out.

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OK, so here I am back underneath views.

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What I'm going to do is create a new view that can list all the instances and any particular model.

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So we scroll back up here and again from jangled up views that generic I'm going to import a list view

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and then we'll scroll down here and it's going to look quite similar to the create view.

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As I mentioned earlier, these are going to start to look a little repetitive, but that's kind of the

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point.

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It should be easy, repetitive and simple to remember how to use these views.

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So we're going say class and we'll say teacher list view and we inherits from list view.

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And again, all we need to do is connect this to the model.

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That we're looking for.

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So we'll say connect it to the teacher model, and actually it could just work with that.

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So I'm going to save this for right now.

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Essentially, all this says is list every instance of a teacher now by default.

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This also has a template name that it looks for, and that template name is going to be model underscore

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lists dot each HTML in the same way we had great view.

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Look for teacher underscore form, but it's HTML.

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This is not looking for model underscore lists that each HTML.

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In fact, let's create that teacher list now.

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So I'll go to a classroom.

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Create a new file and call it teacher underscore list.

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Thought each HTML.

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And this is going to be a list of all the teachers.

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So say each one list of teachers, and I'll let you know it's a list of you.

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And then what I'm going to do here is create an ordered list.

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And this is where I can begin to use some jingo.

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So I'll say four and I'll say for teacher.

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In and then object underscore list, I'll talk more about how I know this called object list later on.

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And then what I want to do is pretty much for every teacher here.

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I'm going to create a list item and we can just say this is a teacher, and let's just use, let's say,

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their first name.

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And then we'll insert teacher.

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Last name.

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OK.

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And that's pretty much what we're going to do here now.

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Next, I need to actually connect this view to a URL, so we'll go ahead.

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And after we save that change under teacher list of you come to your URLs and imports on, I start breaking

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this up into multiple lines of parentheses, just so it's easier to see all the views I'm importing.

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So I'm going to import list.

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Actually, it's teacher list, view, teacher list, view close parentheses there to have this on multiple

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lines, and let's create that new URL path will say this goes under list underscored teacher or teacher

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lists kind of whatever you really want to call it here.

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It's just the URL path.

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And then we say teacher list of you.

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And remember for these because they're class based views and path expects a function.

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We say as view, and then I can give it a name like list teacher.

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OK.

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Save those changes, and the last thing I want to do is actually connect this to a link inside home

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that HTML.

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So I will copy what we've been doing before.

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And then create a new list item here, but this will be not great teacher, but list teacher, and then

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we'll say this is the List Teacher page link.

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So let's save those changes and come back to my original welcome page.

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Make sure we didn't commit any typos or errors.

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So now my welcome home page, I have that new link list teacher page link.

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I click on that and I see a list, the teacher list view.

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Jose Padilla the first name and the last name.

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Let's go back and go to create New Teacher Page Link and check it out just to confirm it's working.

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So I'll say Adam Smith and subject, let's say economics.

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OK.

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Hit submit.

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We're now at the Thank You page.

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And now let's go back to our home page and then what we can do here is check out the List Teacher Page

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Link and now I see Adam Smith perfect.

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Now, let's discuss a few more options for the list of you, so by default, you can see it's extremely

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simple to set up a list of you.

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You just connect the model and boom.

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By default, it's going to do a query request for all the objects inside that model and then just send

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them back.

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And what it does is it sends them back as this object underscore list now object underscore list.

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This can be a little cryptic if maybe you have a really confusing set of views.

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Not really confusing, but let's say you have a lot of use and you just have a front end developer who's

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just looking at this and they start scratching their head.

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What is object list?

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What you could do is actually change this variable name.

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The way you do that is you come back to views and then here on their teacher list view what you can

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say is context.

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Object name.

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And then you pass in a string of what you actually want to have as the object name, so then you could

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say something like teacher list and then instead of the object list, you could call this teacher list.

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So let's confirm that worked.

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You should be able to just come back here and refresh this and you see, have the teachers working again.

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And if you ever want, you can come back here, create a new teacher.

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Let's call this third teacher.

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Teaches math, submit.

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Come back to the classroom page, and we may want to put a link to the home page, and we'll be doing

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that a lot and then we can go to last page here.

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Jose Arrowsmith, third teacher So it looks like that's all working again that allows you to edit what

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this particular variable name is.

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I would recommend that you typically overwrite that object list can be a little confusing, especially

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as you get more and more views and more and more HTML files.

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So it's much easier to understand what teacher list is than what object list is.

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OK, so the other thing on a point out is you actually have a lot of flexibility over what actual query

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is created to grab all the instances in this model.

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So what do I mean by that?

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Well, what you could do is call query set, and let's make sure we spell that right.

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Query set is equal to.

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And here you can override the default query.

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By default, your query looks something like this.

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It's just saying teacher objects.

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All this is essentially the default query set that a list view does.

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But perhaps you may want to actually sort or order the teachers.

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So it's really up to you.

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What other factors you may want inside this query set?

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In fact, later on then you can have multiple lists for different factors.

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But what you do is you override the actual query set that ends up being sent back as this context object.

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So, for example, I can say teacher the objects and then say something like, well, actually order

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by an order by, let's say, their first name.

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And this is where you can use all the skills you learned back in the model section on things about querying

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or filtering, etc. You can use that filter that order by whatever you want really to override this

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query set that way.

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Maybe you don't want to actually list every single teacher, but only maybe certain teachers or something

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like that.

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So you just override the query set attribute, go ahead and save that change.

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And then I'm going to come back here to list the teachers and to refresh this, and you can see now

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it's in alphabetical order.

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A J.

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And T..

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OK.

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So those are the three main attributes that you should know about for a list view.

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Again, the one that's required is to connect it to a model, and we saw technically a one liner.

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That's all you need to do.

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But then if you want to edit the context, object name that's passed back to the model underscore list

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h html.

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You can overwrite that this attribute, and you can even overwrite the actual query set on what does

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actually mean by a list of everything.

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OK.

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Pretty cool.

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Now, so far we have the ability to create a new teacher and list all the teachers.

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But imagine I wanted to be able to get the specific details of a teacher.

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Notice here.

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I don't actually see what each teacher ends up teaching as a subject, so maybe I want to actually get

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what's known as a detail view.

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We'll learn about that in the next lecture.