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24.9
So I can specify, I would like to use these particular settings
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3.61
when you view the admin interface.
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2.85
And so now, if I go back and go ahead and click on flights,
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3.78
then now in this list display, whereas before I only
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3.03
saw IDs and origins and destinations, now I
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2.52
can configure it to show me all of the IDs and origins and destinations
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3.75
and durations as well.
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1.38
I've been able to configure this display to work the way I would like it to.
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3.96
And there are other configurations you can do as well.
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2.4
One that I quite like to use is if I want to update my passenger admin,
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3.84
so when I'm editing a passenger, you can have
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3.12
a special way of manipulating many to many relationships inside
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3.57
of an attribute called filter horizontal.
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2.85
And if I use a horizontal filter on flights,
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3.48
this will just make it a little bit nicer for manipulating
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2.79
the flights that a passenger is on.
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1.62
And again, the specific syntax of this not as important as the idea
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3.06
that these are all just configurable settings that Django has documented.
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3.27
That you can look at to see how to configure the Admin interface to work
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3
exactly the way you want it to work.
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2.85
And so now, if I go back home and go to passengers,
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2.99
and maybe click on a passenger like Harry Potter,
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2.58
I now see this horizontal filter, which is
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2.28
a very nice way of being able to manipulate flights
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2.82
that the person is on.
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1.17
I see on the left a list of their available flights
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2.16
that I could add them to.
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1.47
On the right, a list of their chosen flights.
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1.98
Flights that they're already on.
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1.53
And it becomes very easy for me to just take a flight and double click on it
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3.75
to move it from an available flight to a flight that they're on and vise versa.
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4.05
Just very quickly being able to control and manipulate these models.
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3.57
And this is all stuff that Django just gives to you right out of the box.
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4.89
So Django now has given us a lot of features.
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2.32
The ability to represent models very succinctly.
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2.6
A migration method for being able to very quickly apply
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2.64
those changes to our database.
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1.92
And the last thing we'll take a look at is this idea of authentication.
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3.668
That on many websites, we want some method of authentication.
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2.542
Some ability for users to be able to log in and log out.
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3.15
For Django to remember who a particular user happens to be.
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3.57
And what we're going to do now is introduce
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1.83
an application that lets us interact with this authentication method.
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3.7
Because Django has a whole bunch of authentication features
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2.78
built right into the framework that we can take advantage of so
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2.87
that we don't need to rewrite all the logic for how do you log someone in,
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3.55
and what does it mean to represent the user.
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1.89
Django has done a whole lot of that for us.
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2.7
So we'll go ahead and create an application to do that now.
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3.1
All right, so let's go back into my terminal now.
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2.18
And now, I have this airline project inside
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2.01
of which is one app called flights.
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1.86
And I'd like to now create another app that's going to maintain users inside
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3.18
of this application.
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1.3
So I'll go ahead and run python manage.py start app users.
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3.89
Which will just be an app that's going to allow me to represent users.
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3.63
As before, when I create a new application,
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4.01
I'll need to go into settings.py.
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2.08
Add users as one of the installed apps inside of this project.
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5.46
And I'll go into urls.py to say I'd also like when I go to users,
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6.44
we'll go ahead and include users.urls.
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4
So all the URLs that are associated with my user's application.
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3.75
Now, I'll need to actually create those URLs.
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2.51
So I'll go ahead and go down into my users application,
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3.05
create a new file called urls.py, inside of which
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3.74
is the same as what we've normally see inside of these URLs files.
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3.15
I need to import path, import my views, and then define some URL patterns.
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4.125
Where here what I'd like to do is define one path that takes me to views.index.
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7.4
And we'll call this one index.
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2.01
Then I'll create another path that takes me to log in, called the log in view.
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6.01
And the name will be log in.
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2.36
And we'll have another path called log out for a function called log out
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4.85
view that will be associated with it.
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2.258
So we'll effectively have three different routes.
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2.042
One main index route that's just going to display information about the
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3.09
currently signed in user.
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1.6
One route for logging someone in, a form that
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1.94
will display the place where they can type in a user name
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2.4
and password to log in.
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1.26
And then, one route to allow users to be able to log out from this application
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4.08
as well.
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1.285
So let's go ahead now and actually write these functions.
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2.375
We need one function called index, one function
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2.07
called log in view, one function called log out view.
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3.57
So we'll go into views.py, and we'll start with index.
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4.22
And so what does the index function need to do?
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1.96
It's going to display information about the currently signed in user.
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3.84
That I sign into this website, and then I'm presented with the index page.
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3.83
Because if we think about this programmatically,
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2.14
we first need to think about what should happen
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2.4
if someone tries to access this page but they're not authenticated.
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3.9
How would we even find that out, and what do we do in that situation?
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3.1
Well, let's say, if not request.user.is_authenticated.
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6.25
The request object that gets passed in as part of the request
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2.84
to every user in Django automatically has
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2.27
a user attribute associated with it.
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2.22
And that user object has an is authenticated attribute that tells us
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4.08
if the user is signed in or not.
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2.4
If they're not signed in, we'll go ahead and HTTP response
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3.9
redirect them to the log in view.
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4.442