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Quizzes aren't much use without questions, and questions usually need an answer, so let's see what we can do about this.
Since we've used it a time or two, here's more information about get_absolute_url. I definitely encourage you to provide this for every model that has a detail view.
Our question and
0:00
answer models actually won't need any
inheritance, at least not right away.
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This will give us some good
practice with foreign keys, though.
0:06
So I wanted to show what I did as
far as the HTML and stuff goes.
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So we now have a text detail and
a quiz detail.
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If you were to look at a text one,
it's still gonna look exactly the same.
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If you were to look at a quiz one,
it now just says, quiz questions here.
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It's the same idea, basically.
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Added a quiz in here that belongs
to our particular course.
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So, let's go,
we need to make a couple of new models.
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You need to make like a question model and
an answer model because we have quizzes,
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but we have no questions,
and we have no answers.
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So our question model's gonna be pretty
simple, actually, for right now.
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We're gonna make it a little more
complicated in a bit, so don't get too
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comfortable, but let's call it a question,
and we'll say it's models.Model,
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like we've done before, and
we need a foreign key back to the quiz.
1:00
So models.ForeignKey(Quiz), and
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we need to know the order for
the question,
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like, which question should we ask first?
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And by default, it's gonna be 0,
and then prompt.
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It's gonna be a text field, and
this is where you type in the prompt
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for the question, right?
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Like the text that shows up.
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So, class Meta, we're gonna say
ordering is equal to order,
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cuz we want it ordered by the order.
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And then,
let's define a get_absolute_url, and
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I don't wanna have a link
to a specific question.
1:50
That seems kind of silly, but I do wanna
have a link directly to the quiz so
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we're gonna return
self.quiz.get_absolute_url.
1:59
I have to be able to spell
all of this stuff, and
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I wanted to find a string method, and
I'm just gonna return self.prompt so
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that way, if I wanted to, I could just
print out the question and I'm good.
2:13
I've got the thing, so I like to
do migrations for each model, for
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each change.
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I know we did a couple of changes before.
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We did the abstract and
the moving content to text but
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it doesn't change the database
in more than one way.
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It did one change to the database, so for
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this one we're gonna be adding one
new model, so let's add a new model.
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So python manage.py makemigrations courses
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Okay, now we don't have to apply it right
now, I just like to make it for each one.
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So let's go ahead and
make out answer model as well.
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So, answers, [SOUND],
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obviously belong to a question, right?
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So, models.model.
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So our answer should have
a ForeignKey back to the question.
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That they belong to.
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If we want to specify the order of the
answers then we can, but we don't have to.
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And then we need a text that'll
show up in the answer and
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we'll say that it can, at most,
be 255 characters long.
3:34
And then,
we need an ability to say whether or
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not a particular answer
is the correct answer.
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So we'll do a boolean field and
we'll default this to false.
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Because by default the answers are gonna
be wrong we're gonna specify exactly which
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answer is correct so
we'll do class meta again ordering
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equals order you'll find yourself
doing that quite a bit and
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we'll define the STR
again Return self.text.
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Partly this is because we want it
to look nice in the admin, but
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also just because these are handy
things to always have on your models.
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You want to be able to pull up your
model in Python's, or in Django's shell,
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rather, and be able to get something
that makes sense when you look at it.
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You don't want to just see, like, the ID
number or the memory address or whatever,
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So let's make another migration real
quick, and there's that one, and
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then let's run both of those, python
manage.py migrate courses and there we go.
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It applies number 6 and
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it applies number 7, so cool,
we should be good to go on those.
4:45
And let's just,
we'll go ahead and run our side.
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And we can add them into
the admin real quick even though
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I don't think we'll use them
in the admin a whole lot.
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Let's change this to that.
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And then we'll do models.Text.
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[NOISE] Let's just take out this end line.
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That end line is stupid.
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We're never gonna use that.
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Which means we don't need this anymore so
that's nice.
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All right, and
then admin.site.register(models.Question).
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I'll go and add the models into
those other things in just a minute.
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Register(models.Answer).
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So this means models.,
models., models., cool.
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So now, if I go over here to courses and
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I refresh, I should see answers,
questions, quizzes, tests, courses.
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They're always in alphabetical order.
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So, whatever.
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There are things you can go to
change the order of them, but
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I don't usually find
it all that important.
6:02
It's a really good idea to get use to
creating that get absolute URL method too.
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It makes it easier to get to
specific model instances.
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And in admin we'll use it too To give you
a view on site button for each instance.
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And who doesn't like shortcuts?
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So, like I said before, these are simple,
everyday utilitarian models.
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But now that we have
a solid question model,
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we can diversify it with two new
models that both extend question.
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